Detectors and Experiments

Transcription

1 Detectors and Experiments How far can we push the detector technology to maximize the Higgs measurement capabilities? - Michelangelo Mangano Now I understand. The experimentalist connects the nut and bolt to the Feynman diagram. - Sung Keun Park (student) (Measurements in space, time, momentum, and energy) Speakers: Albert De Roeck CERN Xin Chen Tsinhua U. Silvia Franchino U. Heidelberg Xuai Zhuan IHEP, Beijing John Hauptman Iowa State U. Hongbo Zhu, IHEP, Beijing Sehwook Lee Kyungpook National U. Massimo Caccia, INFN, U. dell Insubria Huirong Qi IHEP, Beijing Xiangmin Sun, Central China Normal U. Richard Talman Cornell U. Marcel Stanitzki, DESY Charles Young SLAC Huirong Qi, IHEP, Beijing Chris Tully Princeton U. Haijun Yang, Shanghai, Jiaotong U. Guido Tonelli U. Pisa Michele Cascella, University College London Manqi Ruan IHEP, Beijing Jianming Qian, U. Michigan Cia-ming Kuo National Central U. Yuanning Gao, Tsunghua U. Aurelio Juste IFAE Shin-shan Yu National Central U. 1

2 It is useful to remember why we are here studying an electronpositron machine: Event detector e ciency The CEPC is a unique opportunity to maximize the physics precisions for 100% efficient event ensembles (Manqi Ruan) 2

3 Reduce these uncertainties Look for rare decays of Higgs 3

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5 Scientific goal must be to measure every particle of the SM with comparable precision ~2% 5

6 Vertex detectors (impact parameter measurement) silicon age Massimo Caccia <<γβcτ 6

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8 Tracking detectors (momentum measurement) - magnetic field 8

9 You can see tracking resolution in ATLAS and CMS data: p/p (GeV/c) 1 p/p (GeV/c) 1 9

10 A vitally important process that depends heavily on tracking precision:... and, also, on EM and hadronic calorimeters: Z! e + e (tracking and EM calorimeter) Z! q q! jet-jet (hadronic calorimeter) 10

11 A real choice: There is a third option: a drift chamber like in KLOE. Not popular (a lot of wires). 11

12 TPC for CEPC - Huirong Qi Richard Talman instrumented magnetic volume - replace LumiCal+QD0 with a fiber dual-readout calorimeter 12

13 A TPC is a beautiful and complex device: a fast pure gas is important the 3.63 us beam crossing time is too fast to clear the positive ions from the volume, leading to E-field distortions maybe use a UV laser to generate a perfectly straight line of ionization Z-pole running is a huge problem for a slow TPC 13

14 Back to the Future all-silicon tracking The struggle to keep the mass down: ~0.3Xo is good 14

15 Can t see tracks in 5-layer silicon tracking system Tracks are obvious in a TPC,... but..., not a fair comparison. Silicon is shown in 2-dim, each point is more precise, and the silicon is fast whereas a TPC is slow, events pile up, and positive ions distort the E-field. 15

16 Calorimeters (energy measurement) - total absorption E/E a/ p E c stochastic term constant term Poisson detector / p N non-uniformities Electromagnetic calorimeters (for electrons and photons) are simple and have good energy resolution. All varieties are easily put on one plot. 16

17 Why is hadronic energy measurement so difficult? 17

18 Emulsion measurement of 30 GeV proton breaking up a nucleus: this is what happens throughout a calorimeter volume 18

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20 Dual-readout calorimeters are getting close to 2% energy resolution at high energies ~300 GeV 20

21 Energy resolution of compensating and dual-readout calorimeters, and GEANT highprecision simulation of dual-readout 21

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23 What a 30% stochastic term buys: W and Z from direct di-jet mass resolution 23

24 Digital Hadronic Calorimeter (DHCAL) (Haijun Yang, CEPC) Event images in 3-d Energy resolution for pions up to 100 GeV 24

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26 CMS energy resolution is improved with PFA analysis ATLAS energy resolution; no improvement with PFA 26

27 Time measurement (Chris Tully) A time resolution of 10ps is 3mm; reject backgrounds at a fast machine; tag vertex for photons in an EM calorimeter. It is not inconceivable that 1ps (0.3mm) is achievable. 27

28 Timing in dual-readout calorimeters 28

29 Timing in dual-readout calorimeters for particle ID 29

30 Unification of experimental resolutions ~2% four-vector resolution on standard model particles 30

31 There are varied and excellent choices in high-precision vertex and tracking chambers. Hadronic calorimeters are the last remaining problem in detectors, and achieving 2% energy resolution will result is excellent (and easy!) physics analyses. Thank you. 31

32 debris 32

33 Talks and Topics "The Importance of High-Precision Hadronic Calorimetry to Physics" (jh) "The Importance of Tracking: TPC vs. Silicon" (cy,hrq) "Everything You Always Wanted to Know About the Original DREAM Module" (swl) Discussion on Calorimetry" (adr,jh) "Crystal and Fiber Dual-readout Calorimeters: Building and Understanding Them" (sf) "Detector Challenges at Future Colliders" (adr,rt,jh Pixel Detectors for an Experiment at the ILC (hbz) CEPC Vertex/Si Tracker (mc) Machine Detector Interface at Electron Colliders Hongbo Zhu (Institute of High Energy Physics, Chinese Academy of Sciences) IAS Lecture Theater, G/F 14:25-14:50 Pixel Detectors for an Experiment at the ILC Massimo Caccia (Italian Institute of Nuclear Physics (INFN); Università dell Insubria) 14:50-15:15 CEPC Vertex/Si Tracker Xiangming Sun (Central China Normal University) 15:15-15:45 Coffee break Lobby, G/F 15:45-16:10 Future trends in Silicon Trackers Marcel Stanitzki (Deutsches Elektronen-Synchroton (DESY)) IAS Lecture Theater, G/F 16:10-16:35 Status of TPC Hybrid Detector Module for the Circular Collider Huirong Qi (Institute of High Energy Physics, Chinese Academy of Sciences) 16:35-17:00 Status Report about the CEPC Calorimeters Haijun Yang (Shanghai Jiaotong University) 17:00-17:25 Energy Resolution and Particle Identification of the Dual-readout Calorimeter Sehwook Lee (Kyungpook National University) 17:25-17:50 Time Structure in Dual Readout Calorimeters Michele Cascella (University College London) - See more at: Detector Requirements for Precision Higgs Boson Physics Jianming Qian (University of Michigan) IAS Lecture Theater, G/F 09:40-10:20 Status of the Studies for a FCC-hh Detector Albert de Roeck (CERN) 10:20-10:30 Chair s conclusion 10:30-11:00 Coffee break Lobby, G/F Chair: Shan Jin (Institute of High Energy Physics, Chinese Academy of Sciences) 11:00-11:40 The International Linear Collider (ILC): Technical Status and Prospect Akira Yamamoto (KEK (Kō Enerugī Kasokuki Kenkyū Kikō)) IAS Lecture Theater, G/F 11:40-12:20 CEPC Detector Yuanning Gao (Tsinghua University) - See more at: 33