MASS OF THE TOP QUARK
|
|
|
- Peter Cooper
- 6 years ago
- Views:
Transcription
1 MASS OF THE TOP QUARK The purpose of this activity is to determine the mass of the top from proton antiproton collision data gathered at Fermi National Accelerator Laboratory in When a proton meets an antiproton with just the right energy in a head on collision, a top antitop pair may form. These decay after s into particles that themselves decay finally into a muon, an antimuon, a neutrino, and four jets of mixed particles called hadrons. (See the diagram to the right.) The top is so exotic that in the billions of collisions performed at Fermilab only about a dozen events fit this profile. Four of the best candidate events were selected for this activity. You have been assigned one of them at random. Find three other students so that you form a group with all four events. You will work together on this project, but each of you will be responsible for processing the data from one event. proton particles bottom top top bottom 1. Since protons have the same mass as antiprotons and since they enter the target chamber from opposite sides with the same speed, their total momentum before annihilation is zero. By conservation of momentum, then, the total momentum of all the decay products must also be zero You will use this fact to begin your analysis. Each data set shows the momentum of the annihilation products in GeV/c (a convenient unit for high energy physics). The momentum of the muon and antimuon are represented with solid green and dashed green lines, respectively. The total momentum of the hadron jets are represented with solid blue brackets. The momentum of the neutrino is not shown. (Neutrinos are extremely difficult to detect.) Since the total momentum must equal zero, the momentum of the neutrino will be equal and opposite the sum of the momenta of the other decay products. Determine the x and y components of these momenta using a protractor and calculator. (The direction of the muon and antimuon are quite definite, but the direction of the momentum of the jets is subjective. Choose a mean direction for these clusters of particles.) Find the vector sum of the components along each axis; that is, the total momentum in the x direction and the total momentum in the y direction. Combine these two numbers using Pythagorean Theorem to find the resultant momentum of the decay products. The momentum of the neutrino will be equal and opposite this vector sum. State it. 2. The units in this experiment were chosen to eliminate the need for conversions. In high energy collisions, the magnitude of the momentum of a particle in GeV/c is the same as its energy in GeV and the energy of the decay products in GeV is also equal to the mass of the pair produced in GeV/c 2. Energy is a scalar quantity. Add the energies of the decay products: muon, antimuon, the four jets, and the elusive neutrino (which you determined in step one). Take this number and divide by two (since this reaction produced a top antitop pair). This is the mass of the top in GeV/c 2. State it. 3. Your group should now have four pages of data and analysis, one for each of the four data sets. Be sure that the name of the student responsible appears at the top of the page and that the results from steps one and two are circled. Now prepare a cover sheet. Write the title of this activity, the names of the group members, a purpose statement, and a conclusion (that is, the average of the four calculations). Staple all five pages together and submit them before the end of the second period. W boson muon W boson low energy muon neutrino antiparticles antiproton
2 82.2 GeV/c 34.2 GeV/c 39.8 GeV/c 8.6 GeV/c 18.8 GeV/c 48.3 GeV/c Run Event 00026
3 92.7 GeV/c 52.0 GeV/c 33.3 GeV/c 54.9 GeV/c 65.0 GeV/c Run Event GeV/c
4 94.0 GeV/c 9.2 GeV/c 48.3 GeV/c 59.7 GeV/c 40.2 GeV/c 63.0 GeV/c Run Event 00553
5 54.8 GeV/c 17.0 GeV/c 61.2 GeV/c 95.5 GeV/c 58.6 GeV/c 7.3 GeV/c Run Event 14022
The Particle World. This talk: What is our Universe made of? Where does it come from? Why does it behave the way it does?
The Particle World What is our Universe made of? Where does it come from? Why does it behave the way it does? Particle physics tries to answer these questions. This talk: particles as we understand them
GET STARTED ON THE WEB WITH HYPATIA AND OPloT
GET STARTED ON THE WEB WITH HYPATIA AND OPloT You will now analyze up to 50 particle collisions (events) by using the visualization application HYPATIA. From these collisions, you shall try to find the
The ATLAS Experiment and the CERN Large Hadron Collider
The ATLAS Experiment and the CERN Large Hadron Collider HEP101-4 February 20, 2012 Al Goshaw 1 HEP 101 Today Introduction to HEP units Particles created in high energy collisions What can be measured in
Elementary Particle Physics Glossary. Course organiser: Dr Marcella Bona February 9, 2016
Elementary Particle Physics Glossary Course organiser: Dr Marcella Bona February 9, 2016 1 Contents 1 Terms A-C 5 1.1 Accelerator.............................. 5 1.2 Annihilation..............................
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
PhysicsAndMathsTutor.com 1
Q1. (a) The K meson has strangeness 1. State the quark composition of a meson... State the baryon number of the K meson... (iii) What is the quark composition of the K meson?.... The figure below shows
GET STARTED ON THE WEB WITH HYPATIA AND OPloT
GET STARTED ON THE WEB WITH HYPATIA AND OPloT You will now analyze up to 50 particle collisions (events) by using the visualization application HYPATIA. From these collisions, you shall try to find the
Lecture 11. Weak interactions
Lecture 11 Weak interactions 1962-66: Formula/on of a Unified Electroweak Theory (Glashow, Salam, Weinberg) 4 intermediate spin 1 interaction carriers ( bosons ): the photon (γ) responsible for all electromagnetic
Dissecting the Higgs Discovery: The Anatomy of a 21st Century Scientific Achievement
Dissecting the Higgs Discovery: The Anatomy of a 21st Century Scientific Achievement Lauren Tompkins Arthur H. Compton Lectures October 19th, 2013 Lecture 6 Adding particles with a little help from Einstein
Particle Physics: Problem Sheet 5
2010 Subatomic: Particle Physics 1 Particle Physics: Problem Sheet 5 Weak, electroweak and LHC Physics 1. Draw a quark level Feynman diagram for the decay K + π + π 0. This is a weak decay. K + has strange
Particle Physics Outline the concepts of particle production and annihilation and apply the conservation laws to these processes.
Particle Physics 12.3.1 Outline the concept of antiparticles and give examples 12.3.2 Outline the concepts of particle production and annihilation and apply the conservation laws to these processes. Every
Search for non-thermal dark matter and new scalar boson at the LHC
Search for non-thermal dark matter and new scalar boson at the LHC 2015/10/21 KPS meeting/gyeongju Namgyun Jeong*, YoungDo Oh and DongHee Kim Department of physics, Kyungpook National University KPS Oct.
INTRODUCTION TO THE STANDARD MODEL OF PARTICLE PHYSICS
INTRODUCTION TO THE STANDARD MODEL OF PARTICLE PHYSICS Class Mechanics My office (for now): Dantziger B Room 121 My Phone: x85200 Office hours: Call ahead, or better yet, email... Even better than office
Tutorial on Top-Quark Physics
Helmholtz Alliance at the Terascale Data Analysis Group Introductory School on Terascale Physics 21 25 February, 2011 Tutorial on Top-Quark Physics Introduction to the Tevatron, the CDF Detector and Top-Quark
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
Matter: it s what you have learned that makes up the world Protons, Neutrons and Electrons
Name The Standard Model of Particle Physics Matter: it s what you have learned that makes up the world Protons, Neutrons and Electrons Just like there is good and evil, matter must have something like
Particle accelerators
Particle accelerators Charged particles can be accelerated by an electric field. Colliders produce head-on collisions which are much more energetic than hitting a fixed target. The center of mass energy
14 Top Quark. Completing the Third Generation
14 Top Quark Completing the Third Generation No one could doubt that there would be a sixth quark, the top or t, but it was equally certain that initially no one knew where it would be found. With the
Particle Physics with Electronic Detectors
Particle Physics with Electronic Detectors This experiment performed by the Oxford group on the 7 GeV proton synchrotron, NIMROD, at the Rutherford Laboratory in 1967 gave the first usefully accurate measurement
Modern physics 1 Chapter 13
Modern physics 1 Chapter 13 13. Particle physics Particle studied within the ATLAS-project CERN In the beginning of 1930, it seemed that all the physics fundaments was placed within the new areas of elementary
Precision measurements of the top quark mass and width with the DØ detector
FERMILAB-CONF-10-588-E Precision measurements of the top quark mass and width with the DØ detector for the DØ collaboration Irfu/SPP/CEA Saclay E-mail: agrohsje@fnal.gov Since the discovery of the top
SECOND PUBLIC EXAMINATION. Honour School of Physics Part C: 4 Year Course. Honour School of Physics and Philosophy Part C C4: PARTICLE PHYSICS
A047W SECOND PUBLIC EXAMINATION Honour School of Physics Part C: 4 Year Course Honour School of Physics and Philosophy Part C C4: PARTICLE PHYSICS TRINITY TERM 05 Thursday, 8 June,.30 pm 5.45 pm 5 minutes
Exam Results. Force between charges. Electric field lines. Other particles and fields
Exam: Exam scores posted on Learn@UW No homework due next week Exam Results F D C BC B AB A Phy107 Fall 2006 1 Particles and fields We have talked about several particles Electron,, proton, neutron, quark
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
Neutrino Physics. Kam-Biu Luk. Tsinghua University and University of California, Berkeley and Lawrence Berkeley National Laboratory
Neutrino Physics Kam-Biu Luk Tsinghua University and University of California, Berkeley and Lawrence Berkeley National Laboratory 4-15 June, 2007 Outline Brief overview of particle physics Properties of
THE FLORIDA STATE UNIVERSITY COLLEGE OF ARTS & SCIENCES W BOSON PRODUCTION CHARGE ASYMMETRY IN THE ELECTRON CHANNEL ASHLEY S HUFF
THE FLORIDA STATE UNIVERSITY COLLEGE OF ARTS & SCIENCES W BOSON PRODUCTION CHARGE ASYMMETRY IN THE ELECTRON CHANNEL By ASHLEY S HUFF A Thesis submitted to the Department of Physics In partial fulfillment
Books: - Martin, B.R. & Shaw, G Particle Physics (Wiley) (recommended) - Perkins, D.H. Introduction to High Energy Physics (CUP) (advanced)
PC 3 Foundations of Particle Physics Lecturer: Dr F. Loebinger Books: - Martin, B.R. & Shaw, G Particle Physics (Wiley) (recommended) - Perkins, D.H. Introduction to High Energy Physics (CUP) (advanced)
Option 212: UNIT 2 Elementary Particles
Department of Physics and Astronomy Option 212: UNIT 2 Elementary Particles SCHEDULE 26-Jan-15 13.pm LRB Intro lecture 28-Jan-15 12.pm LRB Problem solving (2-Feb-15 1.am E Problem Workshop) 4-Feb-15 12.pm
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
At this time the quark model consisted of three particles, the properties of which are given in the table.
*1 In 1961 Murray Gell-Mann predicted the existence of a new particle called an omega (Ω) minus. It was subsequently discovered in 1964. At this time the quark model consisted of three particles, the properties
Particles. Constituents of the atom
Particles Constituents of the atom For Z X = mass number (protons + neutrons), Z = number of protons Isotopes are atoms with the same number of protons number but different number of neutrons. charge Specific
The discovery of W ± and Z 0 vector-bosons
The discovery of W ± and Z 0 vector-bosons Giulia De Zordo April 15, 2014 Abstract This article is about the discovery of the W ± and Z 0 vector-bosons, the carriers of weak interaction. The discovery
Episode 536: Vector bosons and Feynman diagrams
Episode 536: Vector bosons and Feynman diagrams You need to check your own specification here for details of what students will need to do in examinations, and to look at past papers: although Feynman
A brief history of accelerators, detectors and experiments: (See Chapter 14 and Appendix H in Rolnick.)
Physics 557 Lecture 7 A brief history of accelerators, detectors and experiments: (See Chapter 14 and Appendix H in Rolnick.) First came the study of the debris from cosmic rays (the God-given particle
FERMI NATIONAL ACCELERATOR LABORATORY
FERMI NATIONAL ACCELERATOR LABORATORY arxiv:0908.1374v1 [hep-ex] 10 Aug 2009 TEVEWWG/WZ 2009/01 FERMILAB-TM-2439-E CDF Note 9859 D0 Note 5965 10 th August 2009 Updated Combination of CDF and D0 Results
3 Charged Particle Motion in a Magnetic Field
3 Charged Particle Motion in a Magnetic Field When you have completed the Particle Annihilation section and read all the text (especially section 2.2), click the Next button in the Particle Annihilation
PoS(ICHEP2012)194. Measurements of the t t forward-backward asymmetry at CDF. Christopher Hays
Measurements of the t t forward-backward asymmetry at CDF On behalf of the CDF Collaboration Oxford University E-mail: hays@physics.ox.ac.uk At next-to-leading order in QCD, the t t forward-backward asymmetry
Chapter 32 Lecture Notes
Chapter 32 Lecture Notes Physics 2424 - Strauss Formulas: mc 2 hc/2πd 1. INTRODUCTION What are the most fundamental particles and what are the most fundamental forces that make up the universe? For a brick
µ = (15.4 ± 0.2) 10 10
L µ L a Exp µ [1 1 ] a µ = a Exp µ a SM µ [1 1 ] 26.1 ± 8. (3.3 ) 31.6 ± 7.9 (4. ) 1165928.9 ± 6.3 33.5 ± 8.2 (4.1 ) 28.3 ± 8.7 (3.3 ) 29. ± 9. (3.2 ) 28.7 ± 8. (3.6 ) a EW µ = (15.4 ±.2) 1 1 µ µ L µ L
Quantum Numbers. F. Di Lodovico 1 EPP, SPA6306. Queen Mary University of London. Quantum Numbers. F. Di Lodovico. Quantum Numbers.
1 1 School of Physics and Astrophysics Queen Mary University of London EPP, SPA6306 Outline : Number Conservation Rules Based on the experimental observation of particle interactions a number of particle
Z 0 Resonance Analysis Program in ROOT
DESY Summer Student Program 2008 23 July - 16 September 2008 Deutsches Elektronen-Synchrotron, Hamburg GERMANY Z 0 Resonance Analysis Program in ROOT Atchara Punya Chiang Mai University, Chiang Mai THAILAND
EVENT SELECTION CRITERIA OPTIMIZATION FOR THE DISCOVERY OF NEW PHYSICS WITH THE ATLAS EXPERIMENT
EVENT SELECTION CRITERIA OPTIMIZATION FOR THE DISCOVERY OF NEW PHYSICS WITH THE ATLAS EXPERIMENT In large experiments, the researchers must analyze millions of events and choose the candidates for discovery.
Super-KamiokaNDE: Beyond Neutrino Oscillations. A. George University of Pittsburgh
Super-KamiokaNDE: Beyond Neutrino Oscillations A. George University of Pittsburgh PART 1: NUCLEON DECAY What s in a name? Various stages of the experiment have been called: o Kamiokande o Kamiokande-II
The Discovery of the Higgs Boson: one step closer to understanding the beginning of the Universe
The Discovery of the Higgs Boson: one step closer to understanding the beginning of the Universe Anna Goussiou Department of Physics, UW & ATLAS Collaboration, CERN Kane Hall, University of Washington
ATLAS-CONF October 15, 2010
ATLAS-CONF-2010-096 October 15, 2010 Data-driven background estimation for the H τ + τ τ h search at 7 TeV with the ATLAS detector Ian Howley 7 December 2010 1 Motivation One of the primary LHC physics
Chapter 8. Experiment 6: Collisions in Two Dimensions. Historical Aside
Chapter 8 Experiment 6: Collisions in Two Dimensions Last week we introduced the Principle of Conservation of Momentum and we demonstrated it experimentally in linear collisions. This week we will extend
Name : Physics 490. Practice Final (closed book; calculator, one notecard OK)
Name : Physics 490. Practice Final (closed book; calculator, one notecard OK) Problem I: (a) Give an example of experimental evidence that the partons in the nucleon (i) are fractionally charged. How can
The Collider Detector at Fermilab. Amitabh Lath Rutgers University July 25, 2002
The Collider Detector at Fermilab Amitabh Lath Rutgers University July 25, 2002 What is Fermilab? A user facility with the Tevatron: 4 mile ring with superconducting magnets. Collides protons with antiprotons.
PhysicsAndMathsTutor.com
OR K π 0 + µ + v ( µ ) M. (a) (i) quark antiquark pair OR qq OR named quark antiquark pair 0 (iii) us (b) (i) Weak any of the following also score mark: weak interaction weak interaction force weak nuclear
Lecture 14. Dark Matter. Part IV Indirect Detection Methods
Dark Matter Part IV Indirect Detection Methods WIMP Miracle Again Weak scale cross section Produces the correct relic abundance Three interactions possible with DM and normal matter DM Production DM Annihilation
Quantum Numbers. Elementary Particles Properties. F. Di Lodovico c 1 EPP, SPA6306. Queen Mary University of London. Quantum Numbers. F.
Elementary Properties 1 1 School of Physics and Astrophysics Queen Mary University of London EPP, SPA6306 Outline Most stable sub-atomic particles are the proton, neutron (nucleons) and electron. Study
Episode 535: Particle reactions
Episode 535: Particle reactions This episode considers both hadrons and leptons in particle reactions. Students must take account of both conservation of lepton number and conservation of baryon number.
Background Analysis Columbia University REU 2015
Background Analysis Columbia University REU 2015 Kylee Branning Northern Michigan University Adviser: Dr. Kalliopi Iordanidou July 31, 2015 Abstract This study focuses on the development of data driven
PA01. General Certificate of Education January 2008 Advanced Subsidiary Examination
Surname Other Names For Examiner s Use Centre Number Candidate Number Candidate Signature General Certificate of Education January 2008 Advanced Subsidiary Examination PHYSICS (SPECIFICATION A) Unit 1
An Introduction to Particle Physics
An Introduction to Particle Physics The Universe started with a Big Bang The Universe started with a Big Bang What is our Universe made of? Particle physics aims to understand Elementary (fundamental)
Optimizing Selection and Sensitivity Results for VV->lvqq, 6.5 pb -1, 13 TeV Data
1 Optimizing Selection and Sensitivity Results for VV->lvqq, 6.5 pb, 13 TeV Supervisor: Dr. Kalliopi Iordanidou 215 Columbia University REU Home Institution: High Point University 2 Summary Introduction
CMS Event Simulation
CMS Event Simulation Nicole A. Larsen Department of Physics, Georgia Institute of Technology, Atlanta, GA, 33 (Dated: August 11, 6) The CMS Detector located at the Large Hadron Collider at CERN recently
Lecture 8. CPT theorem and CP violation
Lecture 8 CPT theorem and CP violation We have seen that although both charge conjugation and parity are violated in weak interactions, the combination of the two CP turns left-handed antimuon onto right-handed
Discovery Physics at the Large Hadron Collider
+ / 2 GeV N evt 4 10 3 10 2 10 CMS 2010 Preliminary s=7 TeV -1 L dt = 35 pb R > 0.15 R > 0.20 R > 0.25 R > 0.30 R > 0.35 R > 0.40 R > 0.45 R > 0.50 10 1 100 150 200 250 300 350 400 [GeV] M R Discovery
Z-Path 2014 Event Displays Examples of l + l -, and 4-lepton events
Z-Path 2014 Event Displays Examples of l + l -, and 4-lepton events This compilation goes through examples of events the students will be looking at. This includes events easy to interpret, as well as
Physics at the Fermilab Tevatron Collider. Darien Wood Northeastern University
Physics at the Fermilab Tevatron Collider Darien Wood Northeastern University 1 Outline Introduction: collider experiments The Tevatron complex (review) Examples of physics studies at the Tevatron jet
Event Shape Variables in Semileptonic Top Decays Final Report - Summer Students 2007 CMS group
Event Shape Variables in Semileptonic Top Decays Final Report - Summer Students CMS group Antonia Mey B.Sc. th, September Supervisor: Prof. Dr. Mnich Abstract A Monte Carlo generator study was conducted
Single top quark production at CDF
Available online at www.sciencedirect.com Nuclear and Particle Physics Proceedings 73 75 (16) 74 79 www.elsevier.com/locate/nppp Single top quark production at CDF Sandra Leone, on behalf of the CDF Collaboration
W/Z Production Cross Sections and Asymmetries at ECM = 2TeV
W/Z Production Cross Sections and Asymmetries at ECM = 2TeV Dr. Angela Bellavance (University of Nebraska for the CDF and DØ collaborations ) Motivation Experiments and Detectors Z and W Cross Sections
The Particle Adventure Internet Activity-III
Name The Particle Adventure Internet Activity-III Directions: Proceed to http://particleadventure.org Click on Start Here On the Home Glossary/Table of Contents at left, go to the How Do We Experiment
Highlights of top quark measurements in hadronic final states at ATLAS
Highlights of top quark measurements in hadronic final states at ATLAS Serena Palazzo 1,2,, on behalf of the ATLAS Collaboration 1 Università della Calabria 2 INFN Cosenza Abstract. Measurements of inclusive
Electroweak Physics. Krishna S. Kumar. University of Massachusetts, Amherst
Electroweak Physics Krishna S. Kumar University of Massachusetts, Amherst Acknowledgements: M. Grunewald, C. Horowitz, W. Marciano, C. Quigg, M. Ramsey-Musolf, www.particleadventure.org Electroweak Physics
The LHC The Large Hadron Collider and ATLAS
INTRODUCTION The LHC The Large Hadron Collider and ATLAS The accelerator is located at CERN, in a tunnel at a depth of around 100m beneath the French-Swiss border near Geneva. The protons used in the experiments
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
ATLAS Z-Path Masterclass 2013
ATLAS Z-Path Masterclass 2013 It is the dawn of an exciting age of new discovery in particle physics! At CERN, the LHC and its experiments are up and running. The LHC and New Physics The ATLAS detector
.! " # e " + $ e. have the same spin as electron neutrinos, and is ½ integer (fermions).
Conservation Laws For every conservation of some quantity, this is equivalent to an invariance under some transformation. Invariance under space displacement leads to (and from) conservation of linear
PoS(EPS-HEP 2013)508. CMS Detector: Performance Results. Speaker. I. Redondo * CIEMAT
: Performance Results * CIEMAT Av. Compluense 40 Madrid 28040, Spain E-mail: ignacio.redondo@ciemat.es The Compact Muon Solenoid (CMS) detector is one of the two multipurpose experiments at the Large Hadron
Massachusetts Institute of Technology Physics Department. Physics 8.20 IAP 2005 Special Relativity January 28, 2005 FINAL EXAM
Massachusetts Institute of Technology Physics Department Physics 8.20 IAP 2005 Special Relativity January 28, 2005 FINAL EXAM Instructions You have 2.5 hours for this test. Papers will be picked up promptly
SEARCH FOR ASSOCIATED PRODUCTION OF THE HIGGS BOSON IN THE H W W CHANNEL WITH A FULLY LEPTONIC FINAL STATE
Vol. 45 (2014) ACTA PHYSICA POLONICA B No 7 SEARCH FOR ASSOCIATED PRODUCTION OF THE HIGGS BOSON IN THE H W W CHANNEL WITH A FULLY LEPTONIC FINAL STATE Valerio Bortolotto on behalf of the ATLAS Collaboration
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
Chapter 4. Accelerators and collider experiments. 4.1 Particle accelerators: motivations
Chapter 4 Accelerators and collider experiments This chapter gives an introduction to particle accelerators and detectors as well as to data analysis tools relevant in this context. This involves the definition
Weak Interactions & Neutral Currents
Weak Interactions & Neutral Currents Until the the mid-970 s all known weak interaction processes could be described by the exchange of a charged, spin boson, the W boson. Weak interactions mediated by
arxiv: v1 [hep-ex] 28 Aug 2017
![arxiv: v1 [hep-ex] 28 Aug 2017](/thumbs/88/114681072.jpg "arxiv: v1 [hep-ex] 28 Aug 2017")
Proceedings of the Fifth Annual LHCP AL-PHYS-PROC-7-99 November 9, 8 Boosted top production in ALAS and arxiv:78.864v [hep-ex] 8 Aug 7 Marino Romano On behalf of the ALAS and Collaborations, INFN, Sezione
Study of Higgs Boson Decaying to Four Muons at s =14 TeV
Study of Higgs Boson Decaying to Four Muons at s =14 TeV R.M. Aly 1, A.A. Abdelalim 1,2, M.N.El-Bakrey 1 and A. Mahrous 1 1 Department of physics, Faculty of science, Helwan University, Cairo, Egypt. 2
PHYA1. (JUN14PHYA101) WMP/Jun14/PHYA1/E5. General Certificate of Education Advanced Subsidiary Examination June 2014
Centre Number Surname Candidate Number For Examiner s Use Other Names Candidate Signature Examiner s Initials Physics A Unit 1 For this paper you must have: l a pencil and a ruler l a calculator l a Data
Searches for exotic particles in the dilepton and lepton plus missing transverse energy final states with ATLAS
Searches for exotic particles in the dilepton and lepton plus missing transverse energy final states with ATLAS, Vanja Morisbak, Farid Ould-Saada Spåtind conference January 4th 2012 Motivation In spite
Weak interactions. Chapter 7
Chapter 7 Weak interactions As already discussed, weak interactions are responsible for many processes which involve the transformation of particles from one type to another. Weak interactions cause nuclear
Studies on hadronic top decays
Studies on hadronic top decays José M. Clavijo, Havana University, Cuba September 6, 208 Supervisors: Daniela Dominguez Damiani and Hannes Jung Abstract Top events in the boosted regime are studied using
PoS(EPS-HEP2011)250. Search for Higgs to WW (lνlν, lνqq) with the ATLAS Detector. Jonas Strandberg
with the ATLAS Detector Royal Institute of Technology, KTH, Stockholm, Sweden E-mail: jostran@kth.se Higgs boson searches in the H WW ( ) lνlν (l = e, µ) and the H WW ( ) lνqq decay modes, using. fb of
Predictions in cosmology
Predictions in cosmology August 19, 2009 Assuming that space in certain respects may be compared to a physical fluid, and picturing a particle (an electron, say) as a whirl in this fluid, one may imagine
CDF top quark " $ )(! # % & '
$% CDF quark 7 3 5 ( "#! Tevatron Run II Started Spring 1. proton-antiproton collider with (Run I :. antiproton recycler commissioning electron cooling operational by Summer 5. increase in luminosity.
Lecture 2: The First Second origin of neutrons and protons
Lecture 2: The First Second origin of neutrons and protons Hot Big Bang Expanding and cooling Soup of free particles + anti-particles Symmetry breaking Soup of free quarks Quarks confined into neutrons
Physics 7730: Particle Physics
Physics 7730: Particle Physics! Instructor: Kevin Stenson (particle physics experimentalist)! Office: Duane F317 (Gamow tower)! Email: kevin.stenson@colorado.edu! Phone: 303-492-1106! Web page: http://www-hep.colorado.edu/~stenson/!
ATLAS. Questions and Answers
ATLAS Questions and Answers John Rominger-Watts PHYS 129, Fall 2010 Questions: - What is mass? - Why is gravity weak compared to the weak force? - Does dark matter exist? - Why is the universe mostly matter,
IX. Electroweak unification
IX. Electroweak unification The problem of divergence A theory of weak interactions only by means of W ± bosons leads to infinities e + e - γ W - W + e + W + ν e ν µ e - W - µ + µ Divergent integrals Figure
Fall Quarter 2010 UCSB Physics 225A & UCSD Physics 214 Homework 1
Fall Quarter 2010 UCSB Physics 225A & UCSD Physics 214 Homework 1 Problem 2 has nothing to do with what we have done in class. It introduces somewhat strange coordinates called rapidity and pseudorapidity
Efficiency of the CMS Level-1 Trigger to. Selected Physics Channels
Efficiency of the CMS Level-1 Trigger to Selected Physics Channels C. Sulkko University of Colorado, Boulder, CO D. Acosta University of Florida, Gainesville, FL Abstract The efficiency of the Compact
PHY-105: Introduction to Particle and Nuclear Physics
M. Kruse, Spring 2011, Phy-105 PHY-105: Introduction to Particle and Nuclear Physics Up to 1900 indivisable atoms Early 20th century electrons, protons, neutrons Around 1945, other particles discovered.
La ricerca dell Higgs Standard Model a CDF
La ricerca dell Higgs Standard Model a CDF Melisa Rossi INFN-TS Giornata di seminari INFN Trieste - 7 Luglio 2009 FNAL: Fermi National Accelerator Lab Tevatron currently provides the highest energy proton-antiproton
Earlier in time, all the matter must have been squeezed more tightly together and a lot hotter AT R=0 have the Big Bang
Re-cap from last lecture Discovery of the CMB- logic From Hubble s observations, we know the Universe is expanding This can be understood theoretically in terms of solutions of GR equations Earlier in
Wesley Smith, U. Wisconsin, January 21, Physics 301: Introduction - 1
Wesley Smith, U. Wisconsin, January 21, 2014 Physics 301: Introduction - 1 Physics 301: Physics Today Prof. Wesley Smith, wsmith@hep.wisc.edu Undergraduate Physics Colloquium! Discussions of current research
STUDENT WORKSHEET: BUBBLE CHAMBER PICTURES
STUDENT WORKSHEET: BUBBLE CHAMBER PICTURES Woithe, J., Schmidt, R., Naumann, F. (2018). Student worksheet & solutions: Bubble chamber pictures. CC BY 4.0 A guide to analysing bubble chamber tracks including
Visit for more fantastic resources. OCR. A Level. A Level Physics. Particle physics (Answers) Name: Total Marks: /30
Visit http://www.mathsmadeeasy.co.uk/ for more fantastic resources. OCR A Level A Level Physics Particle physics (Answers) Name: Total Marks: /30 Maths Made Easy Complete Tuition Ltd 2017 1. In 1911 the
B D ( ) τν τ decays with hadronic and semileptonic tagging at Belle
B D ( ) τν τ decays with hadronic and semileptonic tagging at Belle Pablo Goldenzweig KIT Moriond EW La Thuile, Italy March 12-19, 2016 Outline Review of Belle s 2015 result of B D ( ) τ ν τ with hadronic
Option 212: UNIT 2 Elementary Particles
Department of Physics and Astronomy Option 212: UNIT 2 Elementary Particles SCHEDULE 26-Jan-15 13.00pm LRB Intro lecture 28-Jan-15 12.00pm LRB Problem solving (2-Feb-15 10.00am E Problem Workshop) 4-Feb-15