BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//CERN//INDICO//EN
BEGIN:VEVENT
SUMMARY:Same-sign dimuon probe of charged lepton flavor violation at elect
 ron–photon colliders
DTSTART;VALUE=DATE-TIME:20260810T060000Z
DTEND;VALUE=DATE-TIME:20260810T062500Z
DTSTAMP;VALUE=DATE-TIME:20260824T154732Z
UID:indico-contribution-2666@indico.itp.ac.cn
DESCRIPTION:Speakers: 宇 张 (合肥工业大学)\nObservation of charged
  lepton flavor violation would constitute unambiguous evidence for physics
  beyond the Standard Model (SM). We identify a previously unexplored same-
 sign dimuon signature in electron--photon collisions\, $\\gamma e^- \\to e
 ^+\\mu^-\\mu^-$\, mediated by an axionlike particle (ALP) with flavor-viol
 ating $e$--$\\mu$ couplings. The absence of irreducible SM backgrounds and
  the on-shell production of the ALP render this channel intrinsically clea
 n and highly sensitive\, with only small residual backgrounds arising from
  detector effects. Such collisions can be realized via laser Compton backs
 cattering at $e^+e^-$ colliders including BEPC-II with the BESIII detector
 \, STCF\, CEPC\, and ILC. We find that STCF\, CEPC\, and ILC can probe cou
 plings one to two orders of magnitude below existing bounds. This combinat
 ion of resonant production\, vanishing irreducible background\, and same-s
 ign topology would be difficult to achieve in conventional $e^+e^-$ or had
 ron-collider environments\, establishing electron--photon collisions as a 
 uniquely powerful probe of charged lepton flavor violation.\n\nhttps://ind
 ico.itp.ac.cn/event/416/contributions/2666/
LOCATION:Conference Center (2F) Front Area
URL:https://indico.itp.ac.cn/event/416/contributions/2666/
END:VEVENT
END:VCALENDAR