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SUMMARY:20th COMPASS Analysis Phase international mini-workshop (COMAP-XX)
DTSTART:20261005T070000Z
DTEND:20261006T170000Z
DTSTAMP:20261102T212500Z
UID:indico-event-1719503@indico.cern.ch
DESCRIPTION:Speakers: Bakur Parsamyan (AANL\, Turin section of INFN and CE
 RN)\n\nThe 20th COMPASS “Analysis Phase” International Mini-Workshop w
 ill take place on October 5\, 2026\, at CERN in Geneva\, Switzerland. The 
 workshop will be held in hybrid mode.\nThe scientific programme of the COM
 PASS “Analysis Phase” International Mini-Workshop series covers the br
 oad range of topics traditionally addressed by the COMPASS Collaboration\,
  including:\n\nSpin and 3D Structure of the Nucleon\nDIS\, SIDIS\, DVCS\, 
 DVMP and Drell-Yan measurements\nTMDs\, GPDs and GTMDs\nFragmentation Func
 tions\nMeson Structure and Spectroscopy\nSearches for Exotics\nMonte-Carlo
  simulation tools and techniques\nTechnical aspects and analysis technique
 s\n\nThe 20th edition will focus in particular on the present status and f
 uture prospects of polarized Drell-Yan measurements and their role in stud
 ies of the transverse-momentum-dependent structure of the nucleon.\nA cent
 ral question will be whether fundamental universality tests of the TMD fra
 mework\, most notably the predicted process dependence and sign change of 
 time-reversal-odd TMD distributions between SIDIS and Drell-Yan\, remain i
 mportant and experimentally unresolved scientific goals. We will discuss t
 o what extent existing measurements already provide the necessary answers\
 , where significant uncertainties remain\, and which future measurements c
 ould have the greatest impact.\nThe programme will review existing and pla
 nned polarized Drell-Yan measurements worldwide\, with particular attentio
 n to the complementarity of different experimental channels. Proton–prot
 on measurements provide important sensitivity to sea-quark contributions\,
  while pion-nucleon Drell-Yan gives access to the valence-quark region\, w
 here effects such as the predicted TMD sign change are expected to be part
 icularly pronounced.\nIn this context\, the workshop will examine the oppo
 rtunities offered by the CERN M2 beamline\, which can provide high-energy 
 pion beams and hosts the former COMPASS experimental area and its successo
 r\, the AMBER experiment. The aim is to assess whether a future pion-induc
 ed polarized Drell-Yan programme at CERN could make a unique contribution 
 to the global study of nucleon spin and three-dimensional hadron structure
 .\nThe workshop will bring together experimentalists\, theorists\, and phe
 nomenologists and will also contribute to the activities of the COST Actio
 n SHARP.\n\nhttps://indico.cern.ch/event/1719503/\n\nZoom: https://cern.zo
 om.us/j/68669404802?pwd=0Bgy4LesknHH9ata6fQGJlXtFbse2D.1
IMAGE;VALUE=URI:https://indico.cern.ch/event/1719503/logo-4140414258.png
LOCATION:892/1-D20 (CERN)
URL:https://indico.cern.ch/event/1719503/
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