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SUMMARY:Workshop on Tau Physics at Belle II and STCF
DTSTART:20260829T230000Z
DTEND:20260901T100000Z
DTSTAMP:20260726T043100Z
UID:indico-event-6175@indico.pnp.ustc.edu.cn
CONTACT:vindy@jlu.edu.cn
DESCRIPTION:The tau lepton is sufficiently heavy to decay into both lepton
 s and hadrons via the charged weak current. As a result\, it provides a un
 ique laboratory for studying electroweak interactions\, hadronic dynamics\
 , and possible signals of physics beyond the Standard Model (SM). Precisio
 n measurements of tau decays play an essential role in testing lepton univ
 ersality\, determining the CKM matrix element |Vus|\, extracting the stron
 g coupling constant αs\, and searching for charged lepton flavor violati
 on (CLFV). In addition\, hadronic tau decays provide valuable input for st
 udies of non-perturbative QCD and spectral functions.\nPrevious measuremen
 ts by the BaBar and Belle experiments have significantly improved the prec
 ision of |Vus| and tests of lepton flavor universality\, while also constr
 aining parameter spaces of new physics models related to CLFV and dark mat
 ter scenarios. However\, no substantial improvement in the determination o
 f αs from hadronic tau decays has been achieved since the measurements pe
 rformed during the LEP era. Furthermore\, a 3σ discrepancy remains betwe
 en the value of |Vus| extracted from inclusive strange hadronic tau decays
  and the value predicted by CKM unitarity. Future high-precision measureme
 nts will help clarify whether this discrepancy is caused by a statistical 
 fluctuation or possibly by new physics.\nThe ongoing high-luminosity asymm
 etric e+e- collisions at the Υ(4S) resonance at Belle II provide an excel
 lent opportunity to address these open questions. At the same time\, the p
 roposed Super Tau-Charm Facility (STCF) aims to provide an extremely clean
  experimental environment for tau and charm physics with very high luminos
 ity near the tau-pair production threshold. The complementary capabilities
  of Belle II and STCF will enable a new generation of precision measuremen
 ts in tau physics. In this context\, organizing a workshop dedicated to ta
 u physics is both timely and valuable. The meeting will bring together exp
 erimentalists and theorists to discuss recent developments\, future experi
 mental opportunities\, and theoretical progress related to tau decays.\n\n
 Topics to be Covered\n\nFundamentals of Tau Physics (Overview & Key proper
 ties)\nHadronic cross-sections at e+e- colliders and CVC tests.\nPrecision
  Measurements of Tau Decays and Spectral Functions\nDetermination of Stand
 ard Model parameters (|Vus|\, αs).\nTests of CP symmetry\, Lepton Flavor 
 Universality\, and Searches for New Physics in Tau Decays\n\n\nLogistics &
  Fees\nLocal Organizing Committee (LOC) cordially invites you to attend th
 is workshop in online or offline mode.\nThe conference fee can be paid at 
 the registration desk upon arrival. Accommodation fees are not included in
  the registration fee and should be paid separately. Please note the foll
 owing details regarding the event:\n\n\n\nItem\nDetails\n\n\n\n\nRegistrat
 ion Fees\n\n1. No registration fee for online participants\n2. For offline
  participants\, Faculty/Postdoc 1500 RMB/person\, students 1000 RMB/pers
 on\n3. If you bring a family member\, the registration fee for the family 
 member is 600 CNY. \n\n\n\nAccommodation\n\n1. 450RMB/night of Holiday In
 n Changchun High Tech Zone\n2. 320RMB/night of Orange Hotel (Changchun Jid
 a Nanxiao Qianjin Street Branch)\n\n\n\n\n\nConference WeChat Group\nPleas
 e scan the QR code below to join the workshop WeChat group for the latest 
 updates and discussions.\n\nCommittees\nAdvisory Committee\n\nProf. Changz
 heng Yuan (IHEP) - yuancz@ihep.ac.cn\nProf. Haiping Peng (USTC) - penghp@u
 stc.edu.cn\nDr. Xiaorong Zhou (USTC) - zxrong@ustc.edu.cn\n\nLocal Organiz
 ing Committee (LOC)\n\nProf. Weimin Song - weiminsong@jlu.edu.cn | +86-152
 01291914\nDr. Vindhyawasini Prasad - vindy@jlu.edu.cn | +86-15643609145\nD
 r. Fabian Becherer - Fabian_becherer@jlu.edu.cn | +86-17143401990\nDr. Hir
 oyuki Umeeda - umeeda@jlu.edu.cn | +86-15643728496\nMs. Miao Zhou (Secreta
 ry) - zhoumiao@jlu.edu.cn | +86-17808059108\n\n\nhttps://indico.pnp.ustc.e
 du.cn/event/6175/
URL:https://indico.pnp.ustc.edu.cn/event/6175/
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