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SUMMARY:Ruling out some predictions of deeply-bound light-heavy tetraquark
 s using lattice QCD
DTSTART;VALUE=DATE-TIME:20210727T161500Z
DTEND;VALUE=DATE-TIME:20210727T164000Z
DTSTAMP;VALUE=DATE-TIME:20261012T211402Z
UID:indico-contribution-18-0-205@cern.ch
DESCRIPTION:Speakers: Dr. COLQUHOUN\, Brian (York University)\nWe discuss 
 our lattice QCD calculations of a number of tetraquark channels with at le
 ast one heavy quark where some phenomenological models\, already fully con
 strained by fits to the ordinary meson & baryon spectrum\, predict deep bi
 nding. We find no evidence of deeply-bound tetraquarks\, except in previou
 sly established strong-interaction stable $I=0$\, $J^P=1^+$ $ud\\bar{b}\\b
 ar{b}$ and $I=1/2$\, $J^P=1^+$ $ls\\bar{b}\\bar{b}$ ($l=u/d$) channels\, a
 llowing us to rule out models predicting deep binding.\n\nhttps://indico.n
 ucleares.unam.mx/event/1541/session/18/contribution/205
LOCATION:Mexico City
URL:https://indico.nucleares.unam.mx/event/1541/session/18/contribution/20
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BEGIN:VEVENT
SUMMARY:ISR studies at Belle II
DTSTART;VALUE=DATE-TIME:20210727T164000Z
DTEND;VALUE=DATE-TIME:20210727T170000Z
DTSTAMP;VALUE=DATE-TIME:20261012T211402Z
UID:indico-contribution-18-0-31@cern.ch
DESCRIPTION:Speakers: JIA\, Sen (Fudan)\nISR physics is an interesting way
  to look for resonant states\, which - in case of observation - has a clea
 r signature. This is unique to an e+e- experiments. We present here first 
 studies performed with the early Phase 3 data at Belle II. The Belle II ex
 periment has recorded data corresponding to 89.99 fb-1 integrated luminosi
 ty\, with which we have performed the analysis of the e+e- -> psi(2S)\, ps
 i(2S)-> pi+ pi- Jpsi\, pi0 pi0 Jpsi\, and eta Jpsi.\n\nhttps://indico.nucl
 eares.unam.mx/event/1541/session/18/contribution/31
LOCATION:Mexico City
URL:https://indico.nucleares.unam.mx/event/1541/session/18/contribution/31
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BEGIN:VEVENT
SUMMARY:Will the relativistic kinematics increase the number of stable mul
 tiquarks?
DTSTART;VALUE=DATE-TIME:20210727T170000Z
DTEND;VALUE=DATE-TIME:20210727T172000Z
DTSTAMP;VALUE=DATE-TIME:20261012T211402Z
UID:indico-contribution-18-0-19@cern.ch
DESCRIPTION:Speakers: Prof. RICHARD\, Jean-Marc (U. Lyon 1)\nFew stable mu
 ltiquarks remain once a careful treatment of the few-body problem is imple
 mented. In this contribution we consider the role played by relativistic k
 inetic energy on their stability. It is found that the binding energy is l
 ower in the relativistic case. Tetraquarks with double heavy flavor become
  stable for a larger heavy-light mass ratio. All-heavy tetraquarks\, not s
 table in standard quark models\, remain unstable when a relativistic form 
 of kinetic energy is adopted.\n\nhttps://indico.nucleares.unam.mx/event/15
 41/session/18/contribution/19
LOCATION:Mexico City
URL:https://indico.nucleares.unam.mx/event/1541/session/18/contribution/19
END:VEVENT
BEGIN:VEVENT
SUMMARY:Covalent hadronic molecules via QCD sum rules
DTSTART;VALUE=DATE-TIME:20210727T172000Z
DTEND;VALUE=DATE-TIME:20210727T174000Z
DTSTAMP;VALUE=DATE-TIME:20261012T211402Z
UID:indico-contribution-18-0-111@cern.ch
DESCRIPTION:Speakers: Dr. CHEN\, Hua-Xing (Southeast University\, Nanjing\
 , China)\nAfter examining the Feynman diagrams corresponding to some candi
 dates of hadronic molecular states\, we propose a possible binding mechani
 sm induced by shared light quarks. We use the method of QCD sum rules to c
 alculate its corresponding light-quark-exchange diagrams\, and the obtaine
 d results indicate a model-independent hypothesis: the light-quark-exchang
 e interaction is attractive when the shared light quarks are totally antis
 ymmetric so that obey the Pauli principle.\n\nhttps://indico.nucleares.una
 m.mx/event/1541/session/18/contribution/111
LOCATION:Mexico City
URL:https://indico.nucleares.unam.mx/event/1541/session/18/contribution/11
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SUMMARY:Pc pentaquarks with pion exchange and quark core couplings
DTSTART;VALUE=DATE-TIME:20210727T174000Z
DTEND;VALUE=DATE-TIME:20210727T180000Z
DTSTAMP;VALUE=DATE-TIME:20261012T211402Z
UID:indico-contribution-18-0-170@cern.ch
DESCRIPTION:Speakers: Dr. YAMAGUCHI\, Yasuhiro (Japan Atomic Energy Agency
 )\nThe $P_c$ pentaquark\,  reported by LHCb\, has attracted a lot of inter
 est.\nWe investigate the $P_c$'s as a meson-baryon molecule coupling to th
 e compact $uudc\\bar{c}$ states. \nThis coupling works as the short-range 
 force in the molecule\, while the pion exchange is employed as the long-ra
 nge force.\nWe study masses and widths of $P_c$ and discuss the roles of t
 he short-range and long-range forces in this model. We also apply this mod
 el to the $P_{cs}$ pentaquarks and discuss their natures.\n\nhttps://indic
 o.nucleares.unam.mx/event/1541/session/18/contribution/170
LOCATION:Mexico City
URL:https://indico.nucleares.unam.mx/event/1541/session/18/contribution/17
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