Measurement of the photon structure function (x,q 2 ) with the LUMI detector at L3. Gyongyi Baksay
|
|
|
- Beryl Phillips
- 5 years ago
- Views:
Transcription
1 Measurement of the photon structure function F (x,q ) with the LUMI detector at L3 Gyongyi Baksay Florida Institute of Technology Melbourne, Florida, USA Advisor: Dr. Marcus Hohlmann Orlando, March -3, 004
2 Topics of Discussion Introduction:CERN, L3, LUMI Theoretical considerations Data analysis and results Summary Orlando, March -3, 004
![L3 e + e e + e hadrons W > 5 GeV σ [nb] 0-0 - 0-3 s' / s > 0.](/docs-images/96/127330290/images/3-1.jpg "85 e + e /Z qq _ () e + e W + W qq _ qq _ 0-4 m H =4 GeV e +")
3 Introduction Two-photon reactions dominant LEP, CERN, Switzerland, France (future LHC) L [pb - ] L3 e + e e + e hadrons W > 5 GeV σ [nb] s' / s > 0.85 e + e /Z qq _ () e + e W + W qq _ qq _ 0-4 m H =4 GeV e + e HZ qq _ qq _ e + e ZZ qq _ qq _ s [GeV] highest centre-of-mass energy : 07 GeV (Giga-electron Volts) 3
4 The L3 experiment MAIN SUBSYSTEMS: central tracker (SMD, TEC) electromagnetic (ECAL), hadronic (HCAL) calorimeters, and muon chambers. e + e - Tagging: Luminosity Monitor (LUMI), Very Small Angle Tagger (VSAT), Active Lead Rings (ALR), Electromagnetic Calorimeter endcaps Orlando, March -3, 004 4
5 The photon QED: Photon mediator. Photon structureless: direct/bare photon Heisenberg uncertainty principle: Photon violates conservation of energy: f E t > f f f or interacts => parton content resolved, photon reveals its structure. Photon extended object=> charged fermions+gluons Dual nature of photon: direct or resolved One possible description: Photon Structure Function Orlando, March -3, 004 5
6 The different appearances of the photon Photon: QED-photon couples to fermions (quarks & leptons) Lepton pair production => process can be calculated in QED Quark pair production => QCD corrections Photon interactions receive several contributions: photon fluctuates into a hadronic state which subsequently interacts bare photon Does not reveal a structure The QED structure functions can only be used for the analysis of leptonic final states. For hadronic final states the leading order QED diagrams are not sufficient and QCD corrections are important. Orlando, March -3, 004 6
7 e + e - e + e - * * e + e - + hadrons deep-inelastic scattering reaction θ tag >> 0 electron observed inside the detector θ antitag 0 other electron undetected single-tag HADRON CALORIMETER ELECTROMAGNETIC CALORIMETER LUMI e - tag LUMI θ tag e - BEAM PIPE * e + (*) LUMI e + antitag θantitag 0 LUMI ELECTROMAGNETIC CALORIMETER HADRON CALORIMETER Orlando, March -3, 004 7
8 Photon Structure Function F (x,q ) ~ probability that the probe photon with virtuality Q sees a parton (quark or gluon) with momentum fraction x inside the target quasi-real photon. dσ * e(k) (q) e tag dxdq (k )X (x,q y = (p q)/(p K) ' ) πα = [(+ ( y) )F 4 xq (x,q ) y ( E E ) cos (θ ), y 0 tag beam tag F L (x,q )] Single-tag variables: Q x = = q Q ( Q + W + P ) = Q ( p q) E E tag beam( cos θ tag ) q q k i i q q = ( E = E * i * i = Q = ( xq, p = Q * i p 0 * masssquaredof + q ), Q ) q x = q q i ( i =,) > 0 the outgoinginteracting fermion: = q + xq Q = q q q 0 W + = ( q + q) = ( E * + E ) ( q p) q = ( E *, q), q ( E, p) = For single tagged events: P 0 Q x = Q + W The Bjorken variable x tells us what fraction of the photon four momentum was carried by the particle which participated to the interaction: the target photon itself or a parton (quark or gluon) inside the photon. Orlando, March -3, 004 8
9 Analysis Method ) Selection ) Split x and Q in several bins 3) Unfolding energy of the target photon is not known Correction with MC (Pythia, Phojet, Twogam) 4) Calculate measured cross section: unfolding Example: selection 998 Q well measured N unfolded N background L acceptance trigger efficiency 5) F (x,q ) obtained using analytically calculated differential cross section (program Galuga) Correlations between the generated and measured Q, x, W; MC: Phojet 9
10 Orlando, March -3, 004 0
11 Evolution of F with x F /α F (x,q ) vs x with the different contributions: VDM, QCD, QPM quarks Preliminary results: gluons F (VDM) x
12 Q evolution of F Expected LUMI-L3 results add data points to the low x region! High statistics! Test of QCD and QED. Orlando, March -3, 004
13 The Grand Daddy prominence Summary Photon is not just a simple structureless object. It s more than that! It can fluctuate into other states (resolved photon, QCD corrections). The photon can be regarded as an object with an internal structure consisting of charged fermions and gluons. Photon structure function analyzed for e + e - e + e - * * e + e - + hadrons Results obtained at LEP/ L3 (using LUMI for tagging the scattered electron) provides the highest statistics ever obtained (highest c.m. energy). Orlando, March -3, 004 3
14 Thank you! Orlando, March -3, 004 4
Measurements of the Proton F L and F 2 Structure Functions at Low x at HERA
Measurements of the Proton F L and F 2 Structure Functions at Low x at HERA Andrei Nikiforov DESY on behalf of the H1 and ZEUS collaborations Moriond QCD, La Thuile, 13 March 2008 Andrei Nikiforov DESY
Measurement of the photon structure function F 2 γ (x,q 2 ) with the LUMI detector at L3
Measurement of the photon structure functon F (x,q ) wth the LUMI detector at L3 Gyongy Baksay Florda Insttute of Technology Florda, USA Advsors: Marcus Hohlmann Florda Insttute of Technology Mara Kenzle-Focacc
Leptonic Two-Photon Events Measured with L3 at the Large Electron Positron Collider (LEP)
Leptonic Two-Photon Events Measured with L3 at the Large Electron Positron Collider (LEP) by Klaus Dehmelt Diplom-Physiker University of Hamburg, Germany 1999 A dissertation submitted to Florida Institute
Two Photon Physics at a Linear Collider. Richard Nisius, CERN Lund, 13 September 1998
Two Photon Physics at a Linear Collider Richard Nisius, CERN Lund, 3 September 998 Introduction. The instruments 2. The physics Conclusions VLEPP Photon;photon scattering ( ) ( ) Interaction of two quasi-real
QCD cross section measurements with the OPAL and ATLAS detectors
QCD cross section measurements with the OPAL and ATLAS detectors Abstract of Ph.D. dissertation Attila Krasznahorkay Jr. Supervisors: Dr. Dezső Horváth, Dr. Thorsten Wengler University of Debrecen Faculty
Detecting. Particles
Detecting Experimental Elementary Particle Physics Group at the University of Arizona + Searching for Quark Compositeness at the LHC Particles Michael Shupe Department of Physics M. Shupe - ATLAS Collaboration
Structure Functions at Very High Q 2 From HERA
Structure Functions at Very High Q 2 From HERA Christopher M. Cormack For the H1 and ZEUS Collaborations Rutherford Appleton Laboratory, Chilton, Didcot, Oxford, OX11 0QX, United Kingdom Abstract. Measurements
Measurement of F L at HERA. S. Glazov, DESY, Ringberg 2008
Measurement of F L at HERA S. Glazov, DESY, Ringberg 8 DIS kinematics Kinematics of inclusive scattering is determined by and Bjorken x. In x scale parameter / - equal sharing among quarks. Proton structure
The achievements of the CERN proton antiproton collider
The achievements of the CERN proton antiproton collider Luigi DiLella Scuola Normale Superiore, Pisa, Italy Motivation of the project The proton antiproton collider UA1 and UA2 detectors Discovery of the
Charged current DIS with polarised e ± beams at HERA. Alex Tapper
Charged current DIS with polarised e ± beams at HRA Alex Tapper The HRA accelerator e± p 27.5 GeV 920 GeV s=320 GeV Page 2 Longitudinal polarisation at HRA Longitudinal polarisation of the lepton beam
Electroweak results. Luca Lista. INFN - Napoli. LHC Physics
Electroweak results Luca Lista INFN - Napoli EWK processes at LHC p p W and Z production in pp collisions proceeds mainly form the scattering of a valence quark with a sea anti-quark The involved parton
Novel Measurements of Proton Structure at HERA
Introduction Combined Cross Sections & QCD Fits NC & CC Cross Section Measurements F L Summary Novel Measurements of Proton Structure at HERA Katie Oliver University of Oxford On behalf of the H1 and ZEUS
LHC Collider Phenomenology
LHC Collider Phenomenology Theorist! You are a theorist working in the CMS experimental collaboration You work on LHC Collider Phenomenology related to CMS By working in the experimental collaboration
Observation of a New Particle with a Mass of 125 GeV
Observation of a New Particle with a Mass of 125 GeV CMS Experiment, CERN 4 July 2012 Summary In a joint seminar today at CERN and the ICHEP 2012 conference[1] in Melbourne, researchers of the Compact
Neutral Current Cross Sections With Polarised Lepton Beam At ZEUS
Neutral Current Cross Sections With Polarised Lepton Beam At Syed Umer Noor York University, Canada On Behalf of the Collaboration DIS 6, - 4 April 6, Tsukuba, Japan Syed Umer Noor (York University) NC
High Energy Physics. Lecture 9. Deep Inelastic Scattering Scaling Violation. HEP Lecture 9 1
High Energy Physics Lecture 9 Deep Inelastic Scattering Scaling Violation HEP Lecture 9 1 Deep Inelastic Scattering: The reaction equation of DIS is written e+ p e+ X where X is a system of outgoing hadrons
Richard Hall-Wilton University College London. July 2002
PPRP, Richard Hall-Wilton University College London July 2002 July 2002, RAL Overview Introduction to HERA and ZEUS Detector Status Central Tracking Detector Microvertex Detector Global Tracking Trigger
Physics at Hadron Colliders Partons and PDFs
Physics at Hadron Colliders Partons and PDFs Marina Cobal Thanks to D. Bettoni Università di Udine 1 2 How to probe the nucleon / quarks? Scatter high-energy lepton off a proton: Deep-Inelastic Scattering
Collider overview and kinematics
1 Collider overview and kinematics QCD studies at colliders 2 ee - ep - pp QCD collider studies Short Long distance Q: large momentum scale PEP, PETRA, Cornell, LEP, SLD, NLC SLAC, FNAL, CERN, HERA, erhic
Open Issues in DIS The High Energy Perspective
Open Issues in DIS The High Energy Perspective My private point of view using data from DIS in collider mode: Accelerator and Experiments HERA success story: Precision cross sections, structure functions
Multi Lepton events at HERA
St. Petersburg, 25/04/2003 DIS03 Conference Multi Lepton events at HERA Andrea Parenti (on behalf of H and ZEUS Collabs.) Padova University and INFN A.Parenti - Multi Lepton Events at HERA p./?? Outline
Deep Inelastic Scattering in Lepton-Hadron Collisions Probing the Parton Structure of the Nucleon with Leptons Basic Formalism (indep.
Deep Inelastic Scattering in Lepton-Hadron Collisions Probing the Parton Structure of the Nucleon with Leptons Basic Formalism (indep. of strong dynamics and parton picture) Experimental Development Fixed
QCD and jets physics at the LHC with CMS during the first year of data taking. Pavel Demin UCL/FYNU Louvain-la-Neuve
QCD and jets physics at the LHC with CMS during the first year of data taking Pavel Demin UCL/FYNU Louvain-la-Neuve February 8, 2006 Bon appétit! February 8, 2006 Pavel Demin UCL/FYNU 1 Why this seminar?
hep-ex/ Jun 1995
Department of Physics & Astronomy Experimental Particle Physics Group Kelvin Building, University of Glasgow, Glasgow, G 8QQ, Scotland Telephone: +44 ()4 9 8855 Fax: +44 ()4 4 99 GLAS{PPE/95{ 9 th June
Differential photon-jet cross-section measurement with the CMS detector at 7 TeV
Differential photon- cross-section measurement with the CMS detector at 7 ev On behalf of the CMS Collaboration Necmettin Erbakan University, Buyuk Ihsaniye Mh. Kazim Karabekir Cd. No:8, 4080 Selcuklu,
Rho-rho production in two-photon collisions
Labor für Hochenergiephysik, ETH Zürich, Switzerland E-mail: Klaus.Freudenreich@cern.ch The measurement of exclusive ρρ production in two-photon interactions at LEP, γγ ρρ, was studied at two-photon center-of-mass
Results on the proton structure from HERA
Results on the proton structure from HERA Shima Shimizu (CERN) 7/Jan/ @ KEK The world only e-p collider: HERA electron proton A unique collider at DESY, Hamburg H ZEUS Circumference: 6.3 km Operated since
Physics at HERA. Summer Student Lectures August Katja Krüger Kirchhoff Institut für Physik H1 Collaboration
Physics at HERA Summer Student Lectures 10 13 August 009 Kirchhoff Institut für Physik H1 Collaboration email: katja.krueger@desy.de Overview Introduction to HERA Inclusive DIS & Structure Functions formalism
Measurements of charm and beauty proton structure functions F2 c c and F2 b b at HERA
Measurements of charm and beauty proton structure functions F c c and F b b at HERA Vladimir Chekelian MPI for Physics, Germany E-mail: shekeln@mail.desy.de Inclusive charm and beauty production is studied
Heavy Ion Collision Measurements at the LHC Using the CMS Detector
Heavy Ion Collision Measurements at the LHC Using the CMS Detector David Krofcheck on behalf of the CMS Collaboration IAS-CERN Workshop, Singapore, March 26 th So, what happens at the LHC besides Higgs
Beauty contribution to the proton structure function and charm results
and charm results Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Frascati E-mail: andrea.longhin@lnf.infn.it Recent heavy quark production results in deep inelastic scattering and photoproduction
The Z lineshape using data from ALEPH
The Z lineshape using data from ALEPH Standard Model Building blocks of matter Leptons and Quarks Fundamental interactions Coupling between matter ( ν e ) e ν µ µ ( ) ν τ τ ( ) Interaction Carrier ( u
Experimental Aspects of Deep-Inelastic Scattering. Kinematics, Techniques and Detectors
1 Experimental Aspects of Deep-Inelastic Scattering Kinematics, Techniques and Detectors 2 Outline DIS Structure Function Measurements DIS Kinematics DIS Collider Detectors DIS process description Dirac
Hadron multiplicities at the HERMES experiment
A. I. Alikhanyan National Science Laboratory, Yerevan, Armenia E-mail: gevkar@mail.desy.de The HERMES collaboration has measured charge-separated pion and kaon multiplicities in semiinclusive deep-inelastic
Nucleon Valence Quark Structure
Nucleon Valence Quark Structure Z.-E. Meziani, S. Kuhn, O. Rondon, W. Melnitchouk Physics Motivation Nucleon spin and flavor structure High-x quark distributions Spin-flavor separation Moments of structure
Physics Results on the Tagged Structure Functions at HERA
Physics Results on the Tagged Structure Functions at HERA DESY on behalf of H1 and ZEUS Thomas Jefferson National Accelerator Facility Newport News, VA January 16-18 014 Page 1 Exploring Hadron Structure
Discovery of the W and Z 0 Bosons
Discovery of the W and Z 0 Bosons Status of the Standard Model ~1980 Planning the Search for W ± and Z 0 SppS, UA1 and UA2 The analyses and the observed events First measurements of W ± and Z 0 masses
Atlas results on diffraction
Atlas results on diffraction Alessia Bruni INFN Bologna, Italy for the ATLAS collaboration Rencontres du Viet Nam 14th Workshop on Elastic and Diffractive Scattering Qui Nhon, 16/12/2011 EDS 2011 Alessia
Conference Report Mailing address: CMS CERN, CH-1211 GENEVA 23, Switzerland
CMS CR - he Compact Muon Solenoid Experiment Conference Report Mailing address: CMS CERN, CH- GENEVA 3, Switzerland 8/5/6 Charmonium production measured in and pp collisions by CMS arxiv:7.5v [nucl-ex]
Introduction of CMS Detector. Ijaz Ahmed National Centre for Physics, Islamabad
Introduction of CMS Detector Ijaz Ahmed National Centre for Physics, Islamabad Layout of my Lectures: 1) Introduction of CMS Detector 2) CMS sub-detectors 3) CMS Trigger System Contents Introduction of
Mojtaba Mohammadi Najafabadi School of Particles and Accelerators, IPM Aban 22- IPM Workshop on Electroweak and Higgs at the LHC
Electroweak studies for the LHC Mojtaba Mohammadi Najafabadi School of Particles and Accelerators, IPM Aban 22- IPM Workshop on Electroweak and Higgs at the LHC 1 Why accelerator? We live in a cold and
Di muons and the detection of J/psi, Upsilon and Z 0 Jets and the phenomenon of jet quenching
collisions in CMS Bolek Wyslouch École Polytechnique Massachusetts Institute of Technology on behalf of CMS Collaboration CERN, December 2, 2010 1 Heavy Ions at the LHC Huge energy jump from RHIC: factor
Distinguishing quark and gluon jets at the LHC
Distinguishing quark and jets at the LHC Giorgia Rauco (on behalf of the ALAS and CMS Collaborations) Universität Zürich, Zürich, Switzerland Abstract: Studies focused on discriminating between jets originating
Measurements of Proton Structure at Low Q 2 at HERA
Measurements of Proton Structure at Low Q 2 at HERA Victor Lendermann Kirchhoff-Institut für Physik, Universität Heidelberg Im Neuenheimer Feld 227, 69120 Heidelberg Germany Abstract. Inclusive ep scattering
PoS(DIS 2010)190. Diboson production at CMS
(on behalf of the CMS collaboration) INFN-Napoli & University of Basilicata E-mail: fabozzi@na.infn.it We present an analysis strategy based on Monte Carlo simulations for measuring the WW and WZ production
Transverse momentum and pseudorapidity distributions with minimum bias events in CMS at the LHC
Transverse momentum and pseudorapidity distributions with minimum bias events in CMS at the LHC Christof Roland/ MIT For the CMS Collaboration Rencontres de Moriond QCD Session 14 th March, 2010 Moriond
The W-mass Measurement at CDF
2010-05 - 10 The W-mass Measurement at CDF Ilija Bizjak, University College London 1/33 Outline 1) Motivation for a W mass measurement Implications for the EW constraints on Higgs mass 2) Measurement of
arxiv:hep-ph/ v1 4 May 1995
CERN-TH/95-103 SMU HEP 95-02 arxiv:hep-ph/9505230v1 4 May 1995 CHARM PRODUCTION IN DEEP-INELASTIC eγ SCATTERING TO NEXT-TO-LEADING ORDER IN QCD 1 Eric Laenen CERN TH-Division 1211-CH, Geneve 23, Switzerland
arxiv: v1 [hep-ex] 16 Aug 2010
![arxiv: v1 [hep-ex] 16 Aug 2010](/thumbs/91/106377886.jpg "arxiv: v1 [hep-ex] 16 Aug 2010")
arxiv:8.75v1 [hep-ex] 16 Aug Measurement of inclusive diffractive deep inelastic scattering using VFPS at H1 Université Libre de Bruxelles E-mail: hreus@mail.desy.de Performances of the Very Forward Proton
THE PHOTON STRUCTURE FROM DEEP INELASTIC ELECTRON}PHOTON SCATTERING
R. Nisius / Physics Reports 332 (2000) 165}317 165 THE PHOTON STRUCTURE FROM DEEP INELASTIC ELECTRON}PHOTON SCATTERING Richard NISIUS CERN, CH-1211 Gene` ve 23, Switzerland AMSTERDAM } LAUSANNE } NEW YORK
The rejection of background to the H γγ process using isolation criteria based on information from the electromagnetic calorimeter and tracker.
Available on CMS information server CMS NOTE 22/3 The Compact Muon Solenoid Experiment CMS Note Mailing address: CMS CERN, CH-1211 GENEVA 23, Switzerland September 9, 22 The rejection of background to
Photoproduction of Events with Rapidity Gaps Between Jets with ZEUS at HERA. PhD Defense May 5, Patrick Ryan, Univ.
Photoproduction of Events with Rapidity Gaps Between Jets with ZEUS at HERA Patrick Ryan University of Wisconsin PhD Defense May 5, 2006 Rapidity Gaps Between Jets in PHP PhD Defense, May. 5 2006-1 Outline
Study of Two-Photon processes at low Q 2 using the VSAT calorimeter in the DELPHI experiment
Organization Document name LUND UNIVERSITY DOCTORAL DISSERTATION Date of issue Department of Physics 17th of September 2004 Professorsgatan 1, Box 118 CODEN: SE-221 00, LUND LUNFD6/(NFFL-7221) 2004 Author(s)
Experimental verification of the Salaam-Weinberg model. Pásztor Attila, Eötvös University Experimental Particle Physics Student Seminar
Experimental verification of the Salaam-Weinberg model Pásztor Attila, Eötvös University Experimental Particle Physics Student Seminar Contents Theoretical considerations Discovery of W and Z bosons (and
3.2 DIS in the quark parton model (QPM)
Experimental studies of QCD 1. Elements of QCD 2. Tests of QCD in annihilation 3. Studies of QCD in DIS 4. QCD in collisions 3.2 DIS in the quark parton model (QPM) M W Elastic scattering: W = M only one
Measurements of the Cross Section for the Process γγ pp at s ee = GeV with the OPAL Detector at LEP
Measurements of the Cross Section for the Process γγ pp at s ee = 183 189 GeV with the OPAL Detector at LEP Teresa Barillari, MPI Munich Photon 2003, Frascati 10 April 2003 Introduction Kinematics Theory
Ridge correlation structure in high multiplicity pp collisions with CMS
Ridge correlation structure in high multiplicity pp collisions with CMS Dragos Velicanu for the CMS Collaboration MBUEWG CERN, Geneva, June 17 2011 Results from High Multiplicity pp Dragos Velicanu (MIT)
The Development of Particle Physics. Dr. Vitaly Kudryavtsev E45, Tel.:
The Development of Particle Physics Dr. Vitaly Kudryavtsev E45, Tel.: 0114 4531 v.kudryavtsev@sheffield.ac.uk The structure of the nucleon Electron - nucleon elastic scattering Rutherford, Mott cross-sections
Electroweak Physics and Searches for New Physics at HERA
Electroweak Physics and Searches for New Physics at HERA Uwe Schneekloth DESY On behalf of the H1 and ZEUS Collaborations 14th Lomonosov Conference on Elementary Particle Physics 5.08.009 Outline Introduction
How to Measure Top Quark Mass with CMS Detector??? Ijaz Ahmed Comsats Institute of Information Technology, Islamabad
How to Measure Top Quark Mass with CMS Detector??? Ijaz Ahmed Comsats Institute of Information Technology, Islamabad Outlines o o o o o o o High Pt top basic idea Methods for jets selection Top quark mass
Physics at Hadron Colliders Part II
Physics at Hadron Colliders Part II Marina Cobal Università di Udine 1 The structure of an event One incoming parton from each of the protons enters the hard process, where then a number of outgoing particles
Recent Results of + c + X and + b + X Production Cross Sections at DØ
Recent Results of + c + X and + b + X Production Cross Sections at DØ Florida State University Wednesday March 18th Virginia HEP Seminar 1 The Standard Model (SM) The Standard Model (SM) describes the
Hadronic events in e + e -
Hadronic events in e + e - Hadronic cross-section, asymmetry (Very short on) Accelerators and detectors Events in the continuum; below, above and at the Z Event selection, ISR WW events Selection of heavy-uark
Observation of Isolated High-E T Photons in Photoproduction at HERA
University of Wisconsin January1999 Observation of Isolated High-E T Photons in Photoproduction at HERA ZEUS Collaboration introduction prompt photons in photoproduction at HERA event selection rejecting
Lecture 3 Cross Section Measurements. Ingredients to a Cross Section
Lecture 3 Cross Section Measurements Ingredients to a Cross Section Prerequisites and Reminders... Natural Units Four-Vector Kinematics Lorentz Transformation Lorentz Boost Lorentz Invariance Rapidity
Physics at the LHC: from Standard Model to new discoveries
Physics at the LHC: from Standard Model to new discoveries Kirill Melnikov University of Hawaii May 2006 Sendai, June 2006 Physics at the LHC: from Standard Model to new discoveries p. 1/22 Outline Standard
arxiv: v1 [hep-ex] 2 Nov 2010
![arxiv: v1 [hep-ex] 2 Nov 2010](/thumbs/74/69991853.jpg "arxiv: v1 [hep-ex] 2 Nov 2010")
Early b-physics at CMS Andrea Rizzi EH Zurich, Switzerland arxiv:.64v [hep-ex] Nov he CMS experiment at the Large Hadron Collider collected in the first months of operation a luminosity of about /nb. he
4th Particle Physcis Workshop. National Center for Physics, Islamabad. Proton Structure and QCD tests at HERA. Jan Olsson, DESY.
th 4 Particle Physics Workshop National Center for Physics, Islamabad Proton Structure and QCD tests at HERA Part 2 The proton structure function F2 NLO QCD describes data over >4 orders of magnitude in
Charged Particle Multiplicity in pp Collisions at s = 13 TeV
Charged Particle Multiplicity in pp Collisions at s = 13 TeV Khadeejah ALGhadeer PhD in Engineering, Physics The Workshop of the APS Topical Group on Hadronic Physics Charged Particle Multiplicity IN PP
STANDARD MODEL AND HIGGS BOSON
PHENIICS DAYS Title : Search for the Higgs boson decaying to two photons and produced in association with a pair of top quarks in the CMS experiment at LHC Thématique : Particle physics Encadrant CEA -
in photon-photon interactions at L3 production Jet and hadron Jet cross-sections Conclusions Inclusive π 0 production Inclusive h ± production
Jet and hadron production in photon-photon interactions at L3 Maria Novella Kienzle-Focacci Université degenève e + e e + e hadrons event selection Inclusive π 0 production Inclusive h ± production Jet
PRECISION&MEASUREMENTS&
PRECISION&MEASUREMENTS& AT&Z&RESONANCE Z&Lineshape&and&number&of&neutrinos Lecture'2 Shahram&Rahatlou Fisica&delle&Par,celle&Elementari,&Anno&Accademico&2138214 http://www.roma1.infn.it/people/rahatlou/particelle/
QCD at CDF. Régis Lefèvre IFAE Barcelona On behalf of the CDF Collaboration
QCD at CDF Régis Lefèvre IFAE Barcelona On behalf of the CDF Collaboration Jet Inclusive Cross-Section Underlying event studies Jet Shapes Specific processes _ W+Jets, γ + γ, γ + b/c, b-jet / bb jet Diffraction
Some studies for ALICE
Some studies for ALICE Motivations for a p-p programme in ALICE Special features of the ALICE detector Preliminary studies of Physics Performances of ALICE for the measurement of some global properties
WW Same-Sign Double Parton Scattering CMS Experiment
WW Same-Sign Double Parton Scattering CMS Experiment Eleanor Fascione Supervisors: M. Dünser and G. Petrucciani Abstract Data collected by the CMS detector of 13 ev centre of mass proton-proton collisions,
7 Physics at Hadron Colliders
7 Physics at Hadron Colliders The present and future Hadron Colliders - The Tevatron and the LHC Test of the Standard Model at Hadron Colliders Jet, W/Z, Top-quark production Physics of Beauty Quarks (T.
Studies of the diffractive photoproduction of isolated photons at HERA
Studies of the diffractive photoproduction of isolated photons at HERA P. J. Bussey School of Physics and Astronomy University of Glasgow Glasgow, United Kingdom, G12 8QQ E-mail: peter.bussey@glasgow.ac.uk
Proton Structure Functions: Experiments, Models and Uncertainties.
Proton Structure Functions: Experiments, Models and Uncertainties. S. Glazov, DESY IKTP seminar, July 8. Disclaimer Nothing in this talk should be interpreted as the final knowledge on proton structure.
Physics at Hadron Colliders
Physics at Hadron Colliders Part 2 Standard Model Physics Test of Quantum Chromodynamics - Jet production - W/Z production - Production of Top quarks Precision measurements -W mass - Top-quark mass QCD
Z boson studies at the ATLAS experiment at CERN. Giacomo Artoni Ph.D Thesis Project June 6, 2011
Z boson studies at the ATLAS experiment at CERN Giacomo Artoni Ph.D Thesis Project June 6, 2011 Outline Introduction to the LHC and ATLAS ((Very) Brief) Z boson history Measurement of σ Backgrounds Acceptances
Beauty jet production at HERA with ZEUS
DESY and University of Hamburg E-mail: mlisovyi@mail.desy.de wo recent measurements of beauty production in deep inelastic ep scattering with the detector are presented. In the first analysis, beauty production
Last Friday: pp(bar) Physics Intro, the TeVatron
Last Friday: pp(bar) Physics Intro, the TeVatron Today: The Large Hadron Collider (LHC) The Large Hadron Collider (LHC) 7 TeV + 7 TeV Protons Protons 10 11 Protons per bunch Bunch Crossings 4x10 7 Hz Proton
Measuring Form Factors and Structure Functions With CLAS
Measuring Form Factors and Structure Functions With CLAS Jerry Gilfoyle for the CLAS Collaboration Physics Department, University of Richmond, Virginia Outline: 1. Jefferson Lab and the CLAS Detector..
Structure Functions and Parton Distribution Functions at the HERA ep Collider
Structure Functions and Parton Distribution Functions at the HERA ep Collider by Chris Targett Adams (University College London) on behalf of the ZEUS and H1 collaborations. Moriond QCD, 16/03/2005 Contents
Drell Yan process at Large Hadron Collider
PRAMANA c Indian Academy of Sciences Vol. 76, No. 3 journal of March 0 physics pp. 4 430 Drell Yan process at Large Hadron Collider MJINDAL, D BOURILKOV, K MAZUMDAR 3, and J B SINGH Panjab University,
Factorisation in diffractive ep interactions. Alice Valkárová Charles University, Prague
Factorisation in diffractive ep interactions Alice Valkárová Charles University, Prague 8th International Workshop on Multiple Partonic Interactions at the LHC, San Cristóbal de las Casas, 2016 HERA collider
Searches for new Physics at HERA
Peter Schleper, Hamburg University LHC 2008 Searches at HERA 1 Searches for new Physics at HERA HERA data & experiments Model independent Search Single top & lepton + P T,miss Supersymmetry Contact Interactions
HERA. Daniel Pitzl, DESY FH1 WA HERA running Status of the experiments Selected physics results. HERA and LHC
HERA Daniel Pitzl, DESY FH1 WA 23.5.2006 HERA running Status of the experiments Selected physics results FL HERA and LHC 1 Luminosity collection H1 luminosity 2005-2006 2005 was HERA's best year so far!
Physics with Jets at the LHC
XXXIV Int. Symp. on Multiparticle Dynamics, Sonoma County, July 29, 2004 ISMD Rohlf p.1/50 Physics with Jets at the LHC Jim Rohlf Boston University Outline Introduction Detectors and expected performance
Identifying Particle Trajectories in CMS using the Long Barrel Geometry
Identifying Particle Trajectories in CMS using the Long Barrel Geometry Angela Galvez 2010 NSF/REU Program Physics Department, University of Notre Dame Advisor: Kevin Lannon Abstract The Compact Muon Solenoid
Photoproduction of Events with Rapidity Gaps Between Jets with ZEUS at HERA. Michigan State HEP Seminar May 2, 2006
Photoproduction of Events with Rapidity Gaps Between Jets with ZEUS at HERA Patrick Ryan University of Wisconsin Michigan State HEP Seminar May 2, 2006 Rapidity Gaps Between Jets in PHP MSU HEP Seminar,
Electron-Positron Annihilation
Evidence for Quarks The quark model originally arose from the analysis of symmetry patterns using group theory. The octets, nonets, decuplets etc. could easily be explained with coloured quarks and the
Introduction to the Standard Model
Introduction to the Standard Model Bill Murray, RAL, Quarks and leptons Bosons and forces The Higgs March 2002 1 Outline: An introduction to particle physics What is the Higgs Boson? Some unanswered questions
Subatomic Physics: Particle Physics Study Guide
Subatomic Physics: Particle Physics Study Guide This is a guide of what to revise for the exam. The other material we covered in the course may appear in uestions but it will always be provided if reuired.
The ATLAS Detector at the LHC
The ATLAS Detector at the LHC Results from the New Energy Frontier Cristina Oropeza Barrera Experimental Particle Physics University of Glasgow Somewhere near the Swiss Alps... A Toroidal LHC ApparatuS
Measurement of photon production cross sections also in association with jets with the ATLAS detector
Nuclear and Particle Physics Proceedings 00 (07) 6 Nuclear and Particle Physics Proceedings Measurement of photon production cross sections also in association with jets with the detector Sebastien Prince
From ZZ 4l to Vector Boson Scattering at LHC
From ZZ 4l to Vector Boson Scattering at LHC Linda Finco Supervisor: Nicola Amapane Second Year Seminar Outline LHC and the CMS Experiment VBS: theoretic introduction and motivations ZZ+2jets Channel ZZ
Particles and Deep Inelastic Scattering
Particles and Deep Inelastic Scattering University HUGS - JLab - June 2010 June 2010 HUGS 1 k q k P P A generic scatter of a lepton off of some target. k µ and k µ are the 4-momenta of the lepton and P
2 ATLAS operations and data taking
The ATLAS experiment: status report and recent results Ludovico Pontecorvo INFN - Roma and CERN on behalf of the ATLAS Collaboration 1 Introduction The ATLAS experiment was designed to explore a broad
TESTING THE STANDARD MODEL IN THE FORWARD REGION AT THE LHC
TESTING THE STANDARD MODEL IN THE FORWARD REGION AT THE LHC Ronan McNulty (UCD Dublin) Irish Quantum Foundations, Castletown House, 3,4 th May 2013 Ronan McNulty, Irish Quantum Foundations 2 Outline Theory: