Outline Introduction - Why HIEPA - What Proposal - How 1 The - PowerPoint PPT Presentation

High Intensity Electron Positron Accelerator (HIEPA) Wenbiao Yan for Zhengguo Zhao University of Science and Technology of China Outline • Introduction - Why • HIEPA - What • Proposal - How 1

The Standard Model and Accelerators for Particle Physics BEPC DAFNE SKEKB Dark matter 2

High Energy Physics in Post Higgs Era • Origin of the electroweak spontaneous symmetry breaking - Higgs property (m H , G , J PC , couplings, s , Br of all possible modes) - Higgs as a tool for discovery (structure, additional Higgs bosons..) • New physics beyond the SM - New energy territory - Precision measurements of SM rare processes Mu2e g -2 m  e g 0.14 ppm 4.2 × 10 −13 90% C.L. 3

Standard Model Consistent with SM ! 4

No indication of SUSY yet, but set lower limits! 5

No indication of SUSY yet, but set lower limits! 10 TeV 6 1 TeV

Beijing Electron Positron Collider E cm : 2.0-4.6 GeV s E : 5.16 × 10 -4 L: 1 × 10 33 cm -2 s -1 @3770 BESIII detector Storage ring 7 7

BESIII Detector and Collaboration Drift chamber (MDC) Drift chamber (MDC) Muon counter 1 T Super conducting magnet Resistive plate chamber Small cell, 43 layer Barrel: 9 layers Gas He/C 3 H 8 =40/60 Endcaps: 8 layers s xy =130 m m, dE/dx~6% s spatial : 1.48 cm s p /p = 0.6% at 1 GeV Time-of-flight (TOF) 5.1 m Plastic scintillator s T ( barrel): 80 ps s T ( endcap): 90 ps ECAL calorimeter RO channels: 10 4 CsI(Tl): L=28 cm (15X 0 ) Cost: 200 M RMB Energy range: 0.02-2GeV At 1 GeV s E (%) s l (mm) Grid computing Data acquisition Event rate: 4 kHz Barrel: 2.5 6.1 CPU: 3200 core Data size: 50 MB/s Endcap: 5 9 Storage: 2.2 pB 8

BESIII Experiment 11 countries, 52 institutions, 351 authros Europe (12) US (6) Germany: Univ. of Bochum, Univ. of Giessen, GSI Univ. of Hawaii Univ. of Johannes Gutenberg Univ. of Washington Helmholtz Ins. In Mainz Carnegie Mellon Univ. Korea (1) Russia: JINR Dubna; BINP Novosibirsk Univ. of Minnesota Italy: Univ. of Torino ， Frascati Lab Univ. of Rochester Seoul Nat. Univ. Netherland ： KVI/Univ. of Groningen Univ. of Indiana Sweden: Uppsala Univ. Japan (1) Turkey: Turkey Accelerator Center China(30) Tokyo Univ. Pakistan (2) IHEP, CCAST, GUCAS, Shandong Univ., Univ. of Punjab Univ. of Sci. and Tech. of China COMSAT CIIT Zhejiang Univ., Huangshan Coll. Huazhong Normal Univ., Wuhan Univ. Zhengzhou Univ., Henan Normal Univ. Peking Univ., Tsinghua Univ. , Zhongshan Univ.,Nankai Univ. Shanxi Univ., Sichuan Univ., Univ. of South China Hunan Univ., Liaoning Univ. Nanjing Univ., Nanjing Normal Univ. Guangxi Normal Univ., Guangxi Univ. Suzhou Univ., Hangzhou Normal Univ. Lanzhou Univ., Henan Sci. and Tech. Univ. Hong Kong Univ., Hong Kong Chinese Univ. 9 9

Features of the t -c Energy Region Rich of resonances, charmonium and charmed mesons. • Threshold characteristics (pairs of t , D, D s , charmed baryons…). • • Transition between smooth and resonances, perturbative and non-perturbative QCD. • Mass location of the exotic hadrons, gluonic matter and hybrid. 10 t + t - L c L c D s D s 10

Physics at t -c Energy Region R= s (e + e -  hadron)/ s (e + e -  m + m - ) • Hadron form factors • Hadron form factors • XYZ particles • XYZ particles • Light hadron spectroscopy • Light hadron spectroscopy • Y(2175) resonance • Y(2175) resonance • Physics with D • Physics with D • Gluonic and exotic states • Gluonic and exotic states • Mutltiquark states • Mutltiquark states mesons mesons • Process of LFV and CPV • Process of LFV and CPV with s quark, Zs with s quark, Zs • f D and f Ds • f D and f Ds • Rare and forbidden decays • Rare and forbidden decays _ • MLLA/LPHD and QCD • MLLA/LPHD and QCD • D 0 -D 0 mixing • D 0 -D 0 mixing • Physics with t lepton • Physics with t lepton sum rule predictions sum rule predictions • Charmed baryons • Charmed baryons Precision D QED , a m , charm quark mass extraction. • R scan Hadron form factor(nucleon, L, p). • 11

Selected Highlights from BES “without this result, we could have excluded the SM Higgs” Bolek Pietrzyk at ICHEP 2000 g t   1 . 0005 0 . 0069 g m 12 t + t - L c L c D s D s 12

Selected Highlights Most precise measurement Abrupt structure Z c (3900) for D leptonic decay X(1835) Large Isospin Violation First L c at BESIII  (1405)  f 0 (980) p 0 Precise measurement Precise Measurement on Cross section e + e − p + p − 13

A Super Tau-charm Factory to Succeed BEPC BEPCII/BESIII will end its mission around 2024 High Intensity Electron Positron Accelerator (HIEPA) 14

What is HIEPA?  Electron Positron Collider for physics  E cm = 2 - 7GeV  Luminosity > 0.5-1  10 35 cm -2 s -1 at 4 GeV  Polarization available on one beam (phase II) − Polarized electron beam source − Siberian Snake curing depolarization  Being a SRF (synchrotron radiation facility).  Reserving the potential for future FEL (free electron laser) study with the long LINAC. 15

What Is HIEPA ? Circumference: ~ 700m 16

Data Samples / Year Efficiency Luminosity Seconds/days Running time/year 10 35 cm -2 s -1  86400s  180days  90% = 1.4ab -1 CLEO-C BES-III/ year HIEPA/year 10 33 cm -2 s -1 (10fb -1 ) 10 35 cm -2 s -1 (1ab -1 ) J/  - - 10  10 9 10  10 11  (2S) 27  10 6 3  10 9 3  10 11 54 pb -1  (3770) 5  10 6 D-pair 4  10 7 4  10 9 818 pb -1 7  10 5 D s -pair 1  10 6 1  10 8 586 pb -1 4.17 GeV 4  10 6 3  10 7 3  10 9 t + t - (4.25) 17

Highlighted Physics Program • Search for new forms of hadron and study their properties. • The nucleon/hadron electromagnetic form factors (NEFFs) and QCD study in none perturbative region. • Search for new physics beyond the SM. • …… 18

Key science question: is there any new forms of hadron exist ? • Exotic hadrons are not predicted by the simple quark model. • Many candidates, such as X(3872), Y(4260) and Zc(3900), have been discovered, but some are not firmly established and their property are poorly known. • To reach conclusive evidence, an e + e - collider in the t -c sector, which is able to provide much higher statistical data and cover wide energy range is essential. • Search for lower mass glueballs, 1 -+ hybrid; • Explore the nature of XYZ particles; • Search for Zcs states 19

Key science question: why do quarks forms colourless hadrons with only two stable configurations, proton and neutron? • NEFFs are among the most basic observables of the nucleon, and intimately related to its internal structure. • Nucleons are the building blocks of almost all-ordinary matter in the universe. The challenge of understanding the nucleon's structure and dynamics has occupied a central place in particle physics. • The fundamental understanding of the hadron form factor in terms of QCD is one of the outstanding problems in particle physics. 20

Key science question: are there any new physics beyond the SM? • We believe physics beyond the SM exist: - Gravity is not take into account - No candidates for dark matter - No explanation to asymmetry of matter and anti matter - ….. • Search for new physics in precision frontier is complementary to that at high energy frontier. • CP Violation in t decay - t -  K S p -  - T-odd rotationally invariant products, e.g. of t - p - p 0  t /k - p 0  t • cLFV: tmg 21

Detector PXD 245 • Material budget ~0.15%X 0 / cm layer York/Muon s xy =50 m m • 185 York/Muon MDC Superconducting magnet cm s xy =130 m m • (0.7-1 T) dE/dx<7%, s p /p =0.5% at 1 • 135 GeV EMC cm PID 105 p /K (and K/p) 3-4 s • PID-barrel cm PID-endcap separation up to 2GeV/c 85 cm 20  EMC Energy range: 0.02-2GeV MDC s E (%) At 1 GeV Barrel(Cs(I): 2 Endcap (Cs): 4 PXD/SSD 15 cm 10 cm MUD 3~6 cm m / p suppression power • IP 120 cm 140 cm 190 cm 240 cm 300 cm >10 22

Activities http://wcm.ustc.edu.cn/pub/CICPI2011/futureplans/ 23

Workshops for HIEPA The Fifth Workshop will be held at UCAS in Beijing around Nov. or Dec. 24