Workshop on the Circular Electron-Positron Collider - EU edition

24 May 2018, 08:00 → 26 May 2018, 13:05 Europe/Rome

Aula Magna del Rettorato (Università degli Studi Roma Tre)

A circular, 100 km circumference, e+e- collider operating at center of mass energies spanning from the Z boson to the Z-Higgs threshold, and potentially reaching up to the top quark pair production threshold, has been proposed and studied in the last few years. This machine is expected to deliver an unprecedented luminosity, more than three orders of magnitude of that achieved in the past at comparable energy, with beam features much different from those planned for linear colliders. These operating conditions call for dedicated detectors optimized for this environment. In addition, the large statistics expected with this high luminosity can potentially allow measurements of extreme statistical precision. The detectors and accelerators should therefore be designed to minimize the sources of systematic uncertainties. The goal of this workshop is to study the accelerator and the associated detectors, discuss results of detector R&D and plans for future work, promote collaboration with the FCC and linear collider communities, and facilitate the formation of international collaborations. This workshop is the first of a series held outside of China on CepC.

Thursday 24 May

08:45 → 11:00 Plenary A

Session Manager: Eleonora Rossi eleonora.rossi@cern.ch

Convener: Dr Biagio Di Micco (ROMA3)

08:45 Welcomes

Speaker: TBD

08:50 Welcome from Roma Tre University - deputy dean on innovation and technological transfer

VIDEO: [https://www.youtube.com/watch?v=Hnqfu-vfNr0 ](https://www.youtube.com/watch?v=Hnqfu-vfNr0)

Speaker: Prof. Alessando Toscano (Università Roma Tre)

08:55 Welcome from INFN - INFN Roma Tre director

VIDEO: [ https://www.youtube.com/watch?v=tTDzTqOcbKY ](https://www.youtube.com/watch?v=tTDzTqOcbKY)

Speaker: Marco Ciuchini (ROMA3)

09:00 Introduction and goals

VIDEO: [https://www.youtube.com/watch?v=RqWpE4iDYkI ](https://www.youtube.com/watch?v=RqWpE4iDYkI)

Speaker: Franco Bedeschi

Slides Rome_Wp_Intro_May2018_V1.pdf Rome_Wp_Intro_May2018_V1.pptx

09:30 CepC Accelerator

VIDEO: [https://www.youtube.com/watch?v=MerMbW1BGBg ](https://www.youtube.com/watch?v=MerMbW1BGBg)

Speaker: Jie Gao

Slides Completion_of_CEPC_accelerator_CDR_and_R&D_towards_TDR-V3.pdf

10:00 FCC Accelerator

VIDEO: [ https://www.youtube.com/watch?v=sppDk2HyN2s ](https://www.youtube.com/watch?v=sppDk2HyN2s)

Speakers: Mr Alain Blondel (University of Geneva), Michael Benedikt (CERN)

Benedikt-FCC-project FCC-Benedikt-2018-05-24.pptx

10:30 LC Accelerator

VIDEO: [https://www.youtube.com/watch?v=-fHJhcBxnX0 ](https://www.youtube.com/watch?v=-fHJhcBxnX0)

Speaker: Dr Daniel Schulte (CERN)

Slides LC_Rome.pdf

11:00 → 11:30 Break

11:30 → 13:00 Plenary B

Session Manager: Eleonora Rossi eleonora.rossi@cern.ch

Convener: Alain Blondel

11:30 CepC phys/detectors

VIDEO: [https://www.youtube.com/watch?v=_j2XZdDs8MI ](https://www.youtube.com/watch?v=_j2XZdDs8MI)

Speaker: Joao Guimaraes Da Costa

Slides Joao-CEPC-PhysicsDetector-Rome-short.pdf

12:00 FCC phys/detectors

VIDEO: [https://www.youtube.com/watch?v=fE-gsWjFKH0 ](https://www.youtube.com/watch?v=fE-gsWjFKH0)

Speaker: Roberto Tenchini (PI)

Slides FCCee-Roma24Maggio2018.pdf

12:30 LC phys/detectors

VIDEO: [ https://www.youtube.com/watch?v=BHbsc7xQVFc ](https://www.youtube.com/watch?v=BHbsc7xQVFc)

Speaker: Marcel Vos (IFIC)

Slides LinearCollider.pdf

13:00 → 14:30 Lunch

14:30 → 17:00 Parallel session 1: MDI

Final focus/MDI/Machine backgrounds

Session Manager Domizia Orestano Domizia.Orestano@cern.ch

Conveners: Ivanka Bozovic-Jelisavcic (VINCA), Dr Mike Koratzinos (CERN)

14:30 Experience from machines today

Speaker: Yasushi Arimoto

Slides 180524-cepc_workshop_ya.pdf

15:00 Overview of MDI of CepC

Remote presentation

Speaker: Sha Bai (IHEP)

Slides Overview_of_MDI_for_CEPC20180524__revised2.pptx

15:30 Detector Solenoid Compensation Scheme

Speaker: Mr Sergey Sinyatkin (BINP SB RAS)

Slides Sinyatkin

16:00 Beam induced backgrounds

Speaker: Hongbo Zhu

Slides Rad_Bkg_Zhu.pdf Rad_Bkg_Zhu.pptx

16:20 Engineering aspects of the MDI design: mechanics, cryogenics and integration

Speaker: Sergey Pivovarov (BINP)

Slides MDI_design_BINP.pptx

14:30 → 17:00 Parallel session 2: Physics

Physics/Simulation
Session Manager Ada Farilla ada.farilla@roma3.infn.it

Conveners: Fulvio Piccinini, Manqui Ruan

14:30 Z pole+WW

Speaker: Paolo Azzurri (PI)

Slides azzurriCEPC_Roma.pdf

15:10 Z+Higgs

Speaker: Prof. Yaquan Fang (Institute of High Energy Physics)

ZHphysics-V2.pptx

15:40 Top

Speaker: Dr Marcel vos (IFIC - centro mixto U. Valencia/CSIC, Valencia, Spain)

Slides topLC.pdf

16:00 BSM

Speaker: Barbara Mele

Slides Mele_CepC.pdf

16:30 Beam parameters

Speaker: Alain Blondel (University of Geneva)

Slides Blondel-precision_parameters.pptx

17:00 → 17:30 Break

17:30 → 18:40 Plenary C

Session Manager Domizia Orestano Domizia.Orestano@cern.ch

Convener: Joao Guimaraes da Costa

17:30 Summary parallel 1:MDI

VIDEO: [ https://www.youtube.com/watch?v=hsyJXCGqBsk ](https://www.youtube.com/watch?v=hsyJXCGqBsk)

Speaker: Michael KORATZINOS

Slides Rome_MDI_summary.pptx

18:00 Summary parallel 2: Physics

VIDEO: [ https://www.youtube.com/watch?v=Gl0vSx8eRok ](https://www.youtube.com/watch?v=Gl0vSx8eRok)

Speaker: Manqi Ruan (IHEP)

Slides Manqi-Physics-Summary-CEPC.pdf

18:30 Day 2 logistic

VIDEO: [ https://www.youtube.com/watch?v=dG1uzBjil5w ](https://www.youtube.com/watch?v=dG1uzBjil5w)

Speaker: Biagio Di Micco

Slides 2day_org.pdf

Friday 25 May

09:00 → 11:00 Parallel 1a

Accelerator
Session Manager Toni Baroncelli toni.baroncelli@roma3.infn.it

Conveners: Catia Milardi (LNF), Chi Yunlong, Prof. Eugene Levichev (BINP), Jie Gao

09:00 Crab-Waist

Speaker: Catia Milardi (LNF)

Slides CEPC_Workshop_CrabWaist_CM.pdf

09:20 CepC/Booster optics

Speaker: Dou Wang

Slides Rome_dou-v3.Wang.Dou.pptx

09:40 CepC beam-beam effects & dynamic aperture

Speaker: Yuan Zhang

Slides zhangy-1805-cepc-rome-v1.pdf zhangy-1805-cepc-rome-v1.pptx

10:00 CEPC Z-pole polarization

Speaker: Sergei Nikitin

Slides PreRoma18Nikitin.pptx

10:20 Energy calibration in high enery colliders

Speaker: Ivan Koop

Slides Koop-CEPC-Rome-2018.pptx

10:40 CEPC linac injector

Speaker: Cai Meng

Slides CEPC_linac_design.CaiMeng.pdf

09:00 → 11:00 Parallel 2a

Physics/Simulation
Session Manager Valentina Vecchio valentina.vecchio@cern.ch

Conveners: Mr Gang Li (IHEO), Jenny List, Patrizia Azzi (PD), Prof. Yaquan Fang (Institute of High Energy Physics)

09:00 CEPC Baseline detector concept

Speaker: Manqi Ruan

Slides Baseline-CEPC-Detector.pdf

09:24 IDEA detector concept

Speaker: Massimo Caccia (MI)

Slides MCa2018_Roma.pdf

09:48 Precision Higgs Combination

Speaker: Kaili Zhang

Slides 20180525_cepcHcombination_v2.pdf

10:12 H->tautau

Speaker: Yu Dan

Slides cepc2018.pdf

10:36 H->gammagamma

Remote presentation

Speaker: Fangyi Guo (Institute of High Energy Physics, CAS)

Slides H-gammagamma.pdf

09:00 → 11:00 Parallel 3a

Trackers
Session Manager Valerio D'Amico valerio.d'amico@cern.ch

Conveners: Prof. Daniela Bortoletto (Purdue University), Dr Huirong Qi (IHEP), Paolo Giacomelli (BO), Werner Riegler, Prof. Zhijun Liang (Institute of High Energy Physics, Chinese Academy of Sciences)

09:00 ALICE Silicon & TPC

Speaker: Werner Riegler

Slides cepc_workshop_rome_may_25_2018_riegler_small.pptx

09:30 CepC pixel prototypes

Speaker: Xin Shi

Slides 20180525-xshi-pix.pdf

10:00 High granularity pixels for CepC

Speaker: Zhou Yang

Slides Development_of_high_granularity_pixel_sensors_for_CEPC_Vertex_Detector.pdf

10:30 A silicon vertex and tracking system for FCC-ee and CLIC

Speaker: Emilia (TBC) Leogrande (CERN)

Slides Leogrande_CEPC.pdf

09:00 → 11:00 Parallel 4a

Calorimeters
Session Manager Luca Martinelli luca.martinelli@roma3.infn.it

Conveners: Jianbei Liu (University of Science and Technology of China), Massimo Caccia (MI), Roberto Ferrari (PV), Mr imad laktineh (ipnl)

09:00 CepC ECAL R&D

Speaker: Dr Mingyi Dong (IHEP)

Slides dongmy_R&D_Status_of_the_CEPC_ScW_ECAL.pdf

09:30 CepC ECAL simulation/optimization

Speaker: Hang Zhao

Slides ECAL_Optimization_CEPC_Workshop_2018.pdf

10:00 CepC HCAL R&D

Speaker: Boxyang Yu

Slides boxiangyu_The_progress_of_CEPC-HCAL-Rome-Workshop-nn.pdf

10:30 CepC HCAL simulation/optimization

Speaker: Bing Liu

Slides liubing_CEPC_HCAL_simulation.pptx

11:00 → 11:30 Break

11:30 → 13:00 Parallel 1b

Accelerator
Session Manager Toni Baroncelli toni.baroncelli@roma3.infn.it

Convener: Jie Gao, Yunlong Chi, Catia Milardi, Eugene Levichev

11:30 Electron sources for FCC-ee

Speaker: Mr Alexey Levichev (BINP)

Slides A_Levichev.ppt

11:48 CEPC Plasma accelerator injector

Speaker: Chi hao Pai

Slides CEPC-Plasma-injector-design.v2.5.pdf CEPC-Plasma-injector-design.v2.5.pptx

12:06 CEPC Ring RF system

Speaker: Jiyuan Zhai

Slides JiyuanZhai_CEPC_Ring_RF_System.pptx

12:22 CEPC SRF Cavity

Speaker: Peng Sha

Slides CEPC_SRF_Cavity.Sha.Peng.pptx

12:40 CEPC High efficiency Klystron

Speaker: Zusheng Zhou

Slides Progress_on_CEPC_High_Efficiency_Klystron-20180525.pdf

11:30 → 13:00 Parallel 2b

Physics/Simulation
Session Manager valentina.vecchio@cern.ch

Convener: Patrizia Azzi, Yaquan Fang, Gang Li, Jenny List

11:30 H->ZZ + anomalous coupling

Speaker: Yanyan Gao

Slides hzz_yyg_25May2018.pdf

12:00 H->WW

Speaker: Tong Li

Slides HWW_LITong180525_RomeWorkshop.pdf

12:30 Higgs cross section and width

Speaker: Hao Liang

Slides report_Liang.pdf

11:30 → 13:00 Parallel 3b

Trackers
Session Manager Valerio D'Amico valerio.d'amico@cern.ch

Convener: Daniela Bortoletto, Paolo Giacomelli, Zhijun Liang, Huirong Qi, Werner Riegler

11:30 IDEA tracker

Speaker: Dr Giovanni Francesco Tassielli (LE)

Slides IDEA-CDCH_CepcRM18.pdf

12:00 CepC full silicon option

Speaker: Chengdong Fu (IHEP, CAS)

Slides FullSiliconTrackerOption@CepC.pdf

12:30 Progress on the low power readout ASIC for TPC with 65nm CMOS

Speaker: Liu Wei (Tsinghua University)

Slides 模拟前端及SARADC修改版.pptx

11:30 → 13:00 Parallel 4b

Calorimeters
Session Manager Luca Martinelli luca.martinelli@roma3.infn.it

Convener: Roberto Ferrari, Massimo Caccia, Jianbei Liu, Imad Laktineh

11:30 Dual Readout calorimetry overview

Speaker: Prof. John Hauptman (Iowa State University)

Slides CEPC-2018-May-25-Rome.pdf

12:00 DR test beam 2017 and future tests

Speaker: Romualdo Santoro (MI)

Slides santoroCEPC18.pdf

12:30 DR full simulation

Speaker: Roberto Ferrari (PV)

Slides cepcrome_roberto20180525.pdf

13:00 → 14:30 Lunch

14:30 → 16:30 Parallel 1c

Accelerator
VIDYO LINK: link to the room
PIN: 14156
Session Manager Toni Baroncelli toni.baroncelli@roma3.infn.it

Convener: Jie Gao, Yunlong Chi, Catia Milardi, Eugene Levichev

14:30 New magnet/cavity alignment system

Speaker: Beniamino Di Girolamo

14:50 CEPC collider ring magnets design

Remote presentation

Speaker: Mei Yang

Slides 2018-05-25_Mei_Yang-CEPC_Magnet_System.pptx

15:10 Magnet polarimeter for FCC-ee

Speaker: Nikolay Muchnoi

Slides muchnoi.pdf

15:30 CEPC Vacuum systems design

Speaker: Yongshen Ma

Slides VacuumYongsheng.pptx

15:50 Feedback Systems in Circular Collider

Speaker: Salvatore Caschera (LNF)

Slides Caschera.pptx

16:10 Components for high current operation

Speaker: David Alesini (LNF)

Slides Alesini.pptx

14:30 → 16:30 Parallel 2c

Physics/Simulation
Session Manager Luca Martinelli luca.martinelli@roma3.infn.it
VIDYO Room: https://vidyoportal.cern.ch/join/EFsNXbyYLd
PIN: 2222

Convener: Patrizia Azzi, Yaquan Fang, Gang Li, Jenny List

14:30 H->invisible

Speaker: Xin Shi

Slides 20180525-xshi-hig.pdf

15:00 H->jetjet

Remote presentation

Speaker: Yu Bai

Slides baiyu-Hbbccgg.pdf

15:30 Machine learning for ee

Speaker: Maurizio Pierini (CERN)

Slides Pierini.pdf

16:00 Physics at the Z pole

Speaker: Prof. Zhijun Liang (Institute of High Energy Physics, Chinese Academy of Sciences)

Slides may25_cepc_rome_zhijun.pdf may25_cepc_rome_zhijun.pptx

14:30 → 16:30 Parallel 3c

Trackers
Session Manager Valentina Vecchio valentina.vecchio@cern.ch

Convener: Daniela Bortoletto, Paolo Giacomelli, Zhijun Liang, Huirong Qi, Werner Riegler

14:30 The TPC for CepC

Speaker: Dr Huirong Qi (IHEP)

Slides Satus_TPC_for_CEPC_Roma_20180525.pdf

15:00 Silicon detector mechanics

Speaker: Dr Tim Jones (University of Liverpool)

Slides Development_of_CFRP_Structures_for_Future_e+e-_colliders.pdf

15:30 CepC magnet R&D

Speaker: Zian Zhu

Slides R&D_progress_of_CEPC_detector_magnet.pdf

16:00 Study of HTS option for CepC

Speaker: Mr Feipeng Ning (IHEP)

Slides Preliminary_study_of_HTS_option_for_CEPC_detector_magnet.pptx

14:30 → 16:30 Parallel 4c

Calorimeters
Session Manager Eleonora Rossi eleonora.rossi@cern.ch

Convener: Roberto Ferrari, Massimo Caccia, Jianbei Liu, Imad Laktineh

14:30 CALICE ECAL

Speaker: Vincent Boudry

Slides 2018-05-25_ECAL_CALICE_CepcWS_VB.odp 2018-05-25_ECAL_CALICE_CepcWS_VB.pdf

15:00 CALICE HCAL

Speaker: Djamel Boumediene (LPC)

Slides boumediene-calice-hcal-052018.pdf

15:30 The High Granularity Calorimeter for CMS

Speaker: David Barney

Slides 2505_Parallel4c_HighGranularityCalorimeter_Barney.pdf 2505_Parallel4c_HighGranularityCalorimeter_Barney.pptx

16:00 New CERN R&D working group

Remote presentation

Speaker: Aleksa Martin

Slides document(1).pdf

16:30 → 17:00 Break

17:00 → 18:30 Parallel 1d

Accelerator
Session Manager Toni Baroncelli toni.baroncelli@roma3.infn.it

Convener: Jie Gao, Yunlong Chi, Catia Milardi, Eugene Levichev

17:00 CEPC cryogenic system

Speaker: Shaopeng Li

Slides CEPC_cryogenic_system_to_Rome_meeting20180525.pdf

17:15 CEPC Civil engineering

Speaker: Renjie Shi, Yu Xiao, Guoqiang Sun

Slides CEPC_Civil_Engineering-Yu_Xiao_Roma20180525.pptx

17:35 CEPC Power

Speaker: Weiren Chou

Slides Rome_2018_-_Weiren_Chou_-_Power.pptx

17:50 HTS magnet

Speaker: Qingjin Xu

Slides Progress_of_the_High_Field_Magnet_R&D_20180525_CEPC2018.pptx

18:10 Beam-gas background characterization in the IR of FCC-ee

Speaker: Oscar Roberto Blanco Garcia (LNF)

Transparents fcceeBeamGas_2018may25c.pdf

17:00 → 18:30 Parallel 2d

Physics/Simulation
Session Manager Luca Martinelli luca.martinelli@roma3.infn.it

Convener: Patrizia Azzi, Yaquan Fang, Gang Li, Jenny List

17:00 ee->ZH ISR correction

Speaker: Mario Greco (ROMA3)

Slides RM3_2018.pdf

17:30 W mass measurement

Speaker: Prof. Hengne Li (South China Normal University)

Slides Hengne_Wmass_CEPC.pdf

17:50 Simulation study of W mass measurement with threshold scan

Speaker: Peixun Shen

Slides W_mass_width.pdf

18:10 2HDM+S and ee

Speaker: Bruce Mellado

Slides ROME250518.pdf

17:00 → 18:30 Parallel 3d

Trackers
Session Manager Valentina Vecchio valentina.vecchio@cern.ch

Convener: Daniela Bortoletto, Paolo Giacomelli, Zhijun Liang, Huirong Qi, Werner Riegler

17:00 e+e- muon detector overview

Speaker: Paolo Giacomelli (BO)

Slides Muon-detectors-CEPC-Roma-05-2018.pdf Muon-detectors-CEPC-Roma-05-2018.pptx

17:30 MPGD options

Speaker: Marco Poli Lener (LNF)

Slides CepC_MPL_Roma_2018.pdf

18:00 RPC options

Speaker: Liang Li

Slides CEPC_2018RomeWorkshop_Muon.pdf

17:00 → 18:30 Parallel 4d

Calorimeters
Session Manager eleonora.rossi@cern.ch

Convener: Roberto Ferrari, Massimo Caccia, Jianbei Liu, Imad Laktineh

17:00 Integral luminosity measurement at CEPC - detector requirements

Speaker: Ivanka Božovic

Slides CEPC_Lumi_Rome2018.pdf

17:30 Latest developments at OMEGA

Speaker: Stephane Callier

Slides SC_FEEforHGcalorimeters_CepC_Roma2018.pdf

18:00 high frequency sampler chip

Speaker: Gary Varner

Slides HighPerfTimingASICs_CepC_RomaMay18_Varner.pptx

Saturday 26 May

09:00 → 11:00 Plenary D

Session Manager Valerio D'Amico valerio.d'amico@cern.ch

Convener: Dr QING QIN (Institute of High Energy Physics, Chinese Academy of Sciences)

09:00 Plenary accelerators

VIDEO: [ https://www.youtube.com/watch?v=icEkLuL_WCI ](https://www.youtube.com/watch?v=icEkLuL_WCI)

Speaker: Yunlong Chi

Slides Summary_-_Accelerator-20180526.pptx

09:30 Plenary Phys/Sim.

VIDEO: [ https://www.youtube.com/watch?v=espiTQtKC8c ](https://www.youtube.com/watch?v=espiTQtKC8c)

Speaker: Li Gang

Slides 2.physim_summary.pdf

10:00 Plenary Trackers

VIDEO: [ https://www.youtube.com/watch?v=oHt2SqH2A_c ](https://www.youtube.com/watch?v=oHt2SqH2A_c)

Speakers: Prof. Daniela Bortoletto (Purdue University), Prof. Daniela Daniela Bortoletto (University Of Oxford)

Slides Rome_summary.pdf

10:30 Plenary Calorimeters

VIDEO: [ https://www.youtube.com/watch?v=S4DHUEFjxGA ](https://www.youtube.com/watch?v=S4DHUEFjxGA)

Speaker: Imad (TBC) Laktineh (IN2P3)

Slides CEPC-summary-CALO-2018-Laktineh.pptx

11:00 → 11:30 Break

11:30 → 13:00 Plenary E

Session Manager Valerio D'Amico valerio.d'amico@cern.ch

Conveners: Dr Biagio Di Micco (ROMA3), Prof. Xinchou LOU (Institute of High Energy Physics)

11:30 Panel discussion on future machines and detector R&D

VIDEO: INTRODUCTION : [ https://www.youtube.com/watch?v=vAuJ-hpZL04 ](https://www.youtube.com/watch?v=vAuJ-hpZL04) DISCUSSION: [ https://www.youtube.com/watch?v=xADCgGhh69k&t;=4s ](https://www.youtube.com/watch?v=xADCgGhh69k&t=4s) Panel composition: Yifang Wang (China), Werner Riegler (CERN), Franco Bedeschi (Italy) Daniela Bortoletto (UK), Imad Laktineh (France), Alain Blondel (Svizzera), Marcel Vos (Spagna)

Slides https://www.youtube.com/watch?v=vAuJ-hpZL04

12:40 Closing remarks IHEP

VIDEO: [https://www.youtube.com/watch?v=H2wBQOjefzU&t;=8s](https://www.youtube.com/watch?v=H2wBQOjefzU&t=8s)

Speaker: Yifang Wang

12:50 Closing remarks INFN

VIDEO: [ https://www.youtube.com/watch?v=lH_7PbQ6Apo&t;=5s ](https://www.youtube.com/watch?v=lH_7PbQ6Apo&t=5s)

Speaker: Franco Bedeschi (PI)