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Sea.ch for the doubly cha.med ba.yon ■

Science China.Physics,Mecha.ics & a.tronomy) 2020年第2期63卷 8-22页

作者： R.a.ij C.a.ellán Beteta.T.a.kernley B.a.eva.M.a.inolfi H.a.sha.nia.C.a.a.da.a.S.a.ola.Z.a.a.touni S.a.a. P.a.bicocco J.a.brecht F.a.essio M.a.exa.der a.a.fonso a.bero G.a.kha.ov P.a.va.ez Ca.telle a.a.a.ves Jr S.a.a.o Y.a.his L.a. L.a.derlini G.a.drea.si M.a.dreotti F.a.chilli J.a.na. Romeu a.a.ta.onov M.a.tuso K.a.zyma.ov E.a.la.ides M.a.zeni B.a.durier S.Ba.hma.n J.J.Ba.k S.Ba.er V.Ba.a.ura.W.Ba.dini a.Ba.a.ov R.J.Ba.low S.Ba.suk W.Ba.ter M.Ba.tolini F.Ba.yshnikov G.Ba.si V.Ba.ozska.a.B.Ba.sukh a.Ba.tig V.Ba.tista.a.Ba. M.Becker F.Bedeschi I.Bedia.a.a.Beiter L.J.Bel V.Bela.in S.Belin N.Beliy V.Bellee K.Belous I.Belya.v G.Bencivenni E.Ben-Ha.m S.Benson S.Bera.ek a.Berezhnoy *** D.Berninghoff H.C.Bernstein E.Bertholet a.Bertolin C.Beta.court F.Betti M.O.Bettler Ia.Bezshyiko S.Bha.in J.Bhom M.S.Bieker S.Bifa.i P.Billoir a.Birnkra.t a.Bizzeti M.Bjφrn M.P.Bla.o T.Bla.e F.Bla.c S.Blusk D.Bobulska.V.Bocci O.Boente Ga.cia.T.Boettcher a.Boldyrev a.Bonda. N.Bonda. S.Borghi M.Borisya. M.Borsa.o J.T.Borsuk T.J.V.Bowcock C.Bozzi S.Bra.n a.Brea.Rodriguez M.Brodski J.Brodzicka.a.Brossa.Gonza.o D.Brundu E.Bucha.a. a.Buona.ra.C.Burr a.Bursche J.S.Butter J.Buyta.rt W.Byczynski S.Ca.eddu H.Ca. R.Ca.a.rese S.Ca.i R.Ca.la.ine M.Ca.vi M.Ca.vo Gomez a.Ca.boni P.Ca.pa.a.D.H.Ca.pora.Perez L.Ca.riotti a.Ca.bone G.Ca.boni R.Ca.dina.e a.Ca.dini P.Ca.niti K.Ca.va.ho a.iba.a.Ca.a.s Vida. G.Ca.se M.Ca.ta.eo G.Ca.a.lero R.Cenci J.Cera.oli M.G.Cha.ma. M.Cha.les Ph.Cha.pentier G.Cha.zikonsta.tinidis M.Chefdeville V.Cheka.ina.C.Chen S.Chen a.Chernov S.-G.Chitic V.Choba.ova.M.Chrza.zcz a.Chubykin P.Cia.brone M.F.Cica.a.X.Cid Vida. G.Cieza.ek F.Cindolo P.E.L.Cla.ke M.Clemencic H.V.Cliff J.Closier J.L.Cobbledick V.Coco J.a.B.Coelho J.Coga. E.Cognera. L.Cojoca.iu P.Collins T.Colombo a.Comerma.Montells a.Contu N.Cooke G.Coombs S.Coquerea. G.Corti C.M.Costa.Sobra. B.Couturier D.C.Cra.k J.Crkovska.a.Crocombe M.Cruz Torres R.Currie C.L.Da.Silva.E.Da.l'Occo J.Da.seno C.D'a.brosio a.Da.ilina.P.d'a.gent a.Da.is O.De a.uia. Fra.cisco K.De Bruyn S.De Ca.ua.M Centro Bra.ileiro de Pesquisa. Fisica.(CBPF) Rio de JaneiroBrazil Universida.e Federa. do Rio de Ja.eiro(UFRJ) Rio de JaneiroBrazil Center for High Energy Physics Tsinghua UniversityBeijingChina School of Physics Sta.e Key La.ora.ory of Nuclea. Physics a.d Technology Peking UniversityBeijingChina University of Chinese a.a.emy of Sciences BeijingChina Institute Of High Energy Physics(IHEP) BeijingChina Institute of Pa.ticle Physics Central China Normal UniversityWuhanHubeiChina Univ.Grenoble a.pes Univ.Savoie Mont BlancCNRSIN2P3-LAPPAnnecyFrance Universite Clermont a.vergne CNRS/IN2P3LPCClermont-FerrandFrance a.x Ma.seille Univ CNRS/IN2P3CPPMMarseilleFrance La. Univ.Paris-SudCNRS/IN2P3Universite Paris-SaclayOrsayFrance LPNHE Sorbonne Universite Paris Diderot Sorbonne Paris Cite CNRS/IN2P3ParisFrance I.Physika.isches Institut RWTH Aachen UniversityAachenGermany Fa.ulta. Physik Technische Universitat DortmundDortmundGermany Ma.-Pla.ck-Institut für Kernphysik(MPIK) HeidelbergGermany Physika.isches Institut Ruprecht-Karls-Universitat HeidelbergHeidelbergGermany School of Physics University College DublinDublinIreland INFN Sezione di Ba.i BariItaly INFN Sezione di Bologna BolognaItaly INFN Sezione di Ferra.a FerraraItaly INFN Sezione di Firenze FirenzeItaly INFN La.ora.ori Na.iona.i di Fra.ca.i FrascatiItaly INFN Sezione di Genova GenovaItaly INFN Sezione di Mila.o-Bicocca MilanoItaly INFN Sezione di Mila.o MilanoItaly INFN Sezione di Ca.lia.i MonserratoItaly INFN Sezione di Pa.ova PadovaItaly INFN Sezione di Pisa PisaItaly INFN Sezione di Roma.Tor Verga.a RomaItaly INFN Sezione di Roma.La.Sa.ienza RomaItaly Nikhef Na.iona. Institute for Suba.omic Physics AmsterdamNetherlands Nikhef Na.iona. Institute for Suba.omic Physics a.d VU University a.sterda. AmsterdamNetherlands Henryk Niewodnicza.ski Institute of Nuclea. Physics Polish a.a.emy of Sciences KrakowPoland a.H-University of Science a.d Technology Faculty of Physics and Applied Computer ScienceKrakowPoland Na.io

a.sea.ch for the doubly cha.med ba.yon ■^+cc is performed through its deca. to theΛ^+c K^-π^+ fina. sta.e,using proton-proton collision da.a.collected with the LHCb detector a. centre-of-ma.s energies of 7,8 a.d 13 *** da.a.correspond to a.tota. integra.ed luminosity of 9 fb^-*** significa.t signa. is observed in the ma.s ra.ge from 3.4 to 3.8 GeV/c^*** limits a.e set a. 95%credibility level on the ra.io of the ■^+cc production cross-section times the bra.ching fra.tion to tha. ofΛ^+c a.d ■^++cc *** limits a.e determined a. functions of the ■^+cc ma.s for different lifetime hypotheses,in the ra.idity ra.ge from 2.0 to 4.5 a.d the tra.sverse momentum ra.ge from 4 to 15 GeV/c.

关键词： cha.med ba.yons limits on production of pa.ticles cha.med qua.ks experimenta. tests

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Mea.urement of Ξcc++ production in pp collisions a. s1/2=13 TeV

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Chinese Physics C 2020年第2期44卷 13-23页

作者： R.a.ij C.a.ellán Beteta.T.a.kernley B.a.eva.M.a.inolfi H.a.sha.nia.C.a.a.da.a.S.a.ola.Z.a.a.touni S.a.a. P.a.bicocco J.a.brecht F.a.essio M.a.exa.der a.a.fonso a.bero G.a.kha.ov P.a.va.ez Ca.telle a.a.a.ves Jr S.a.a.o Y.a.his L.a. L.a.derlini G.a.drea.si M.a.dreotti F.a.chilli a.a.ta.onov M.a.tuso K.a.zyma.ov E.a.la.ides M.a.zeni B.a.durier S.Ba.hma.n J.J.Ba.k S.Ba.er V.Ba.a.ura.W.Ba.dini a.Ba.a.ov R.J.Ba.low S.Ba.suk W.Ba.ter M.Ba.tolini F.Ba.yshnikov J.M.Ba.els G.Ba.si V.Ba.ozska.a.B.Ba.sukh a.Ba.tig a.Ba. M.Becker F.Bedeschi I.Bedia.a.a.Beiter L.J.Bel V.Bela.in S.Belin V.Bellee K.Belous I.Belya.v G.Bencivenni E.Ben-Ha.m S.Benson S.Bera.ek a.Berezhnoy *** D.Berninghoff H.C.Bernstein C.Bertella.E.Bertholet a.Bertolin C.Beta.court F.Betti M.O.Bettler Ia.Bezshyiko S.Bha.in J.Bhom M.S.Bieker S.Bifa.i P.Billoir a.Bizzeti M.Bjørn M.P.Bla.o T.Bla.e F.Bla.c S.Blusk D.Bobulska.V.Bocci O.Boente Ga.cia.T.Boettcher a.Boldyrev a.Bonda. N.Bonda. S.Borghi M.Borisya. M.Borsa.o J.T.Borsuk T.J.V.Bowcock C.Bozzi M.J.Bra.ley S.Bra.n a.Brea.Rodriguez M.Brodski J.Brodzicka.a.Brossa.Gonza.o D.Brundu E.Bucha.a. a.Buona.ra.C.Burr a.Bursche a.Butkevich J.S.Butter J.Buyta.rt W.Byczynski S.Ca.eddu H.Ca. R.Ca.a.rese L.Ca.ero Dia. S.Ca.i R.Ca.la.ine M.Ca.vi M.Ca.vo Gomez P.Ca.a.go Ma.a.ha.s a.Ca.boni P.Ca.pa.a.D.H.Ca.pora.Perez a.F.Ca.poverde Queza.a.L.Ca.riotti a.Ca.bone G.Ca.boni R.Ca.dina.e a.Ca.dini I.Ca.li P.Ca.niti K.Ca.va.ho a.iba.a.Ca.a.s Vida. G.Ca.se M.Ca.ta.eo G.Ca.a.lero S.Cela.i R.Cenci J.Cera.oli M.G.Cha.ma. M.Cha.les Ph.Cha.pentier G.Cha.zikonsta.tinidis M.Chefdeville V.Cheka.ina.C.Chen S.Chen a.Chernov S.-G.Chitic V.Choba.ova.S.Chola. M.Chrza.zcz a.Chubykin P.Cia.brone M.F.Cica.a.X.Cid Vida. G.Cieza.ek F.Cindolo P.E.L.Cla.ke M.Clemencic H.V.Cliff J.Closier J.L.Cobbledick V.Coco J.a.B.Coelho J.Coga. E.Cognera. L.Cojoca.iu P.Collins T.Colombo a.Comerma.Montells a.Contu N.Cooke G.Coombs S.Coquerea. G.Corti C.M.Costa.Sobra. B.Couturier D.C.Cra.k J.Crkovska.a.Crocombe M.Cruz Torres R.Currie C.L.Da.Silva.E.Da.l'Occo J.Da.seno C.D' Centro Bra.ileiro de Pesquisa. Física.(CBPF) Rio de JaneiroBrazil Universida.e Federa. do Rio de Ja.eiro(UFRJ) Rio de JaneiroBrazil Center for High Energy Physics Tsinghua UniversityBeijingChina School of Physics Sta.e Key La.ora.ory of Nuclea. Physics a.d Technology Peking UniversityBeijingChina University of Chinese a.a.emy of Sciences BeijingChina Institute Of High Energy Physics(IHEP) BeijingChina Institute of Pa.ticle Physics Central China Normal UniversityWuhanHubeiChina Univ.Grenoble a.pes Univ.Savoie Mont BlancCNRSIN2P3-LAPPAnnecyFrance UniversitéClermont a.vergne CNRS/IN2P3LPCClermont-FerrandFrance a.x Ma.seille Univ CNRS/IN2P3CPPMMarseilleFrance La. Univ.Paris-SudCNRS/IN2P3UniversitéParis-SaclayOrsayFrance LPNHE Sorbonne UniversitéParis Diderot Sorbonne Paris CitéCNRS/IN2P3ParisFrance I.Physika.isches Institut RWTH Aachen UniversityAachenGermany Fa.ultät Physik Technische Universität DortmundDortmundGermany Ma.-Pla.ck-Institut für Kernphysik(MPIK) HeidelbergGermany Physika.isches Institut Ruprecht-Karls-Universität HeidelbergHeidelbergGermany School of Physics University College DublinDublinIreland INFN Sezione di Ba.i BariItaly INFN Sezione di Bologna BolognaItaly INFN Sezione di Ferra.a FerraraItaly INFN Sezione di Firenze FirenzeItaly INFN La.ora.ori Na.iona.i di Fra.ca.i FrascatiItaly INFN Sezione di Genova GenovaItaly INFN Sezione di Mila.o-Bicocca MilanoItaly INFN Sezione di Mila.o MilanoItaly INFN Sezione di Ca.lia.i MonserratoItaly INFN Sezione di Pa.ova PadovaItaly INFN Sezione di Pisa PisaItaly INFN Sezione di Roma.Tor Verga.a RomaItaly INFN Sezione di Roma.La.Sa.ienza RomaItaly Nikhef Na.iona. Institute for Suba.omic Physics AmsterdamNetherlands Nikhef Na.iona. Institute for Suba.omic Physics a.d VU University a.sterda. AmsterdamNetherlands Henryk Niewodnicza.ski Institute of Nuclea. Physics Polish a.a.emy of Sciences KrakówPoland a.H-University of Science a.d Technology Faculty of Physics and Applied Computer ScienceKrakówPoland Na.iona

The production of ■ba.yons in proton-proton collisions a. a.centre-of-ma.s energy of √s = 13 TeV is mea.ured in the tra.sverse-momentum ra.ge 4a.d the ra.idity ra.ge2.0a.a.used in this mea.urement correspond to a. integra.ed luminosity of 1.7fb^-1,recorded by the LHCb experiment during *** ra.io of the ■ production cross-section times the bra.ching fra.tion of the■→∧^+cK^-π^+ π^+deca. rela.ive to the prompt ∧^+c production cross-section is found to be(2.22±0.27±0.29)×10^-4,a.suming the centra. va.ue of the mea.ured lifetime,where the first uncerta.nty is sta.istica. a.d the second systema.ic.

关键词： doubly cha.med ba.yons ha.ron production QCD

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Evidence of a.J/ψΛstructure a.d observa.ion of excited■^(-)sta.es in the■b^(-)→J/ψΛK^(-) deca.

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Science Bulletin 2021年第13期66卷 1278-1287,M0003页

作者： R.a.ij C.a.ellán Beteta.T.a.kernley B.a.eva.M.a.inolfi H.a.sha.nia.C.a.a.da.a.S.a.ola.Z.a.a.touni S.a.a. J.a.brecht F.a.essio M.a.exa.der a.a.fonso a.bero Z.a.iouche G.a.kha.ov P.a.va.ez Ca.telle S.a.a.o Y.a.his L.a. L.a.derlini a.a.dreia.ov M.a.dreotti F.a.chilli a.a.ta.onov M.a.tuso K.a.zyma.ov E.a.la.ides M.a.zeni B.a.durier S.Ba.hma.n M.Ba.hma.er J.J.Ba.k S.Ba.er P.Ba.a.ron Rodriguez V.Ba.a.ura.W.Ba.dini J.Ba.tista.Leite R.J.Ba.low S.Ba.suk W.Ba.ter M.Ba.tolini F.Ba.yshnikov J.M.Ba.els G.Ba.si B.Ba.sukh a.Ba.tig a.Ba. M.Becker F.Bedeschi I.Bedia.a.a.Beiter V.Bela.in S.Belin V.Bellee K.Belous I.Belov I.Belya.v G.Bencivenni E.Ben-Ha.m a.Berezhnoy *** D.Berninghoff H.C.Bernstein C.Bertella.E.Bertholet a.Bertolin C.Beta.court F.Betti Ia.Bezshyiko S.Bha.in J.Bhom L.Bia. M.S.Bieker S.Bifa.i P.Billoir M.Birch F.C.R.Bishop a.Bizzeti M.Bj┆rn M.P.Bla.o T.Bla.e F.Bla.c S.Blusk D.Bobulska.J.a.Boelha.ve O.Boente Ga.cia.T.Boettcher a.Boldyrev a.Bonda. N.Bonda. S.Borghi M.Borisya. M.Borsa.o J.T.Borsuk S.a.Bouchiba.T.J.V.Bowcock a.Boyer C.Bozzi M.J.Bra.ley S.Bra.n a.Brea.Rodriguez M.Brodski J.Brodzicka.a.Brossa.Gonza.o D.Brundu a.Buona.ra.C.Burr a.Bursche a.Butkevich J.S.Butter J.Buyta.rt W.Byczynski S.Ca.eddu H.Ca. R.Ca.a.rese L.Ca.efice L.Ca.ero Dia. S.Ca.i R.Ca.la.ine M.Ca.vi M.Ca.vo Gomez P.Ca.a.go Ma.a.ha.s a.Ca.boni P.Ca.pa.a.a.F.Ca.poverde Queza.a.S.Ca.elli L.Ca.riotti a.Ca.bone G.Ca.boni R.Ca.dina.e a.Ca.dini I.Ca.li P.Ca.niti L.Ca.us K.Ca.va.ho a.iba.a.Ca.a.s Vida. G.Ca.se M.Ca.ta.eo G.Ca.a.lero S.Cela.i J.Cera.oli a.J.Cha.wick M.G.Cha.ma. M.Cha.les Ph.Cha.pentier G.Cha.zikonsta.tinidis C.a.Cha.ez Ba.a.a. M.Chefdeville C.Chen S.Chen a.Chernov S.-G.Chitic V.Choba.ova.S.Chola. M.Chrza.zcz a.Chubykin V.Chulikov P.Cia.brone M.F.Cica.a.X.Cid Vida. G.Cieza.ek P.E.L.Cla.ke M.Clemencic H.V.Cliff J.Closier J.L.Cobbledick V.Coco J.a.B.Coelho J.Coga. E.Cognera. L.Cojoca.iu P.Collins T.Colombo L.Congedo a.Contu N.Cooke G.Coombs G.Corti C.M.Costa.Sobra. B.Couturier D.C.Cra.k J.Crkovská M.Cruz Torres R.Currie C.L.Da.Silva.E.Da.l’ Centro Bra.ileiro de Pesquisa. Física.(CBPF) Rio de JaneiroBrazil Universida.e Federa. do Rio de Ja.eiro(UFRJ) Rio de JaneiroBrazil Center for High Energy Physics Tsinghua UniversityBeijingChina School of Physics Sta.e Key La.ora.ory of Nuclea. Physics a.d Technology Peking UniversityBeijingChina University of Chinese a.a.emy of Sciences BeijingChina Institute Of High Energy Physics(IHEP) BeijingChina Institute of Pa.ticle Physics Central China Normal UniversityWuhanHubeiChina Univ.Grenoble a.pes Univ.Savoie Mont BlancCNRSIN2P3-LAPPAnnecyFrance UniversitéClermont a.vergne CNRS/IN2P3LPCClermont-FerrandFrance a.x Ma.seille Univ CNRS/IN2P3CPPMMarseilleFrance UniversitéPa.is-Sa.la. CNRS/IN2P3IJCLabOrsayFrance La.ora.oire Leprince-ringuet(llr) PalaiseauFrance LPNHE Sorbonne UniversitéParis Diderot Sorbonne Paris CitéCNRS/IN2P3ParisFrance I.Physika.isches Institut RWTH Aachen UniversityAachenGermany Fa.ultät Physik Technische Universität DortmundDortmundGermany Ma.-Pla.ck-Institut für Kernphysik(MPIK) HeidelbergGermany Physika.isches Institut Ruprecht-Karls-Universität HeidelbergHeidelbergGermany School of Physics University College DublinDublinIreland INFN Sezione di Ba.i BariItaly INFN Sezione di Bologna BolognaItaly INFN Sezione di Ferra.a FerraraItaly INFN Sezione di Firenze FirenzeItaly INFN La.ora.ori Na.iona.i di Fra.ca.i FrascatiItaly INFN Sezione di Genova GenovaItaly INFN Sezione di Mila.o-Bicocca MilanoItaly INFN Sezione di Mila.o MilanoItaly INFN Sezione di Ca.lia.i MonserratoItaly Universita.degli Studi di Pa.ova Universita e INFNPadovaPadovaItaly INFN Sezione di Pisa PisaItaly INFN Sezione di Roma.Tor Verga.a RomaItaly INFN Sezione di Roma.La.Sa.ienza RomaItaly Nikhef Na.iona. Institute for Suba.omic Physics AmsterdamNetherlands Nikhef Na.iona. Institute for Suba.omic Physics a.d VU University a.sterda. AmsterdamNetherlands Henryk Niewodnicza.ski Institute of Nuclea. Physics Polish a.a.emy of Sciences KrakówPoland a.H-University of Science a.d Techno

First evidence of a.structure in the J/ψΛinva.ia.t ma.s distribution is obta.ned from a. a.plitude a.a.ysis of■b^(-)J/ψΛK^(-)*** observed structure is consistent with being due to a.cha.monium penta.ua.k with stra.geness with a.significa.ce of 3.1r including systema.ic uncerta.nties a.d lookelsewhere *** ma.s a.d width a.e determined to be 4458:8±2:9t4:7-1:1 MeV a.d 17:3±6:5t8:0-5:7 MeV,respectively,where the quoted uncerta.nties a.e sta.istica. a.d *** structure is a.so consistent with being due to two *** a.dition,the na.row excited■^(-)sta.es,N■(1690)a.d■(1820),a.e seen for the first time in a.b^(-)deca.,a.d their ma.ses a.d widths a.e mea.ured with improved *** a.a.ysis is performed using pp collision da.a.corresponding to a.tota. integra.ed luminosity of 9 fb^(-1),collected with the LHCb experiment a. centre-of-ma.s energies of 7,8 a.d 13 TeV.

关键词： QCD Exotics Penta.ua.k Spectroscopy Qua.konium Pa.ticle a.d resona.ce production

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Sea.ch for the doubly hea.y ba.yons Ω^(0)_(bc) a.d E^(0)_(bc) deca.ing to Λ^(+)_(c)π^(-) a.d E^(+)_(c)π^(-)

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Chinese Physics C 2021年第9期45卷 10-21页

作者： R.a.ij C.a.elia. Beteta.T.a.kernley B.a.eva.M.a.inolfi H.a.sha.ia.C.a.a.da.a.S.a.ola.Z.a.a.touni S.a.a.J.a.brecht F.a.essio M.a.exa.der a.a.fonso a.bero Z.a.iouche G.a.kha.ov P.a.va.ez Ca.telie S.a.a.o Y.a.his L.a. L.a.derlini a.a.dreia.ov M.a.dreotti F.a.chilli a.a.ta.onov M.a.tuso K.a.zyma.ov E.a.la.ides M.a.zeni B.a.durier S.Ba.hma.n M.Ba.hma.er J.J.Ba.k P.Ba.a.ron Rodriguez V.Ba.a.ura.W.Ba.dini J.Ba.tista.Leite R.J.Ba.low S.Ba.suk W.Ba.ter M.Ba.tolini F.Ba.yshnikov J.M.Ba.els G.Ba.si B.Ba.sukh a.Ba.tig a.Ba. M.Becker F.Bedeschi I.Bedia.a.a.Beiter V.Bela.in S.Belin V.Bellee K.Belous I.Belov I.Belya.v G.Bencivenni E.Ben-Ha.m a.Berezhnoy *** D.Beminghoff H.C.Bernstein C.Bertella.a.Bertolin C.Beta.court F.Betti Ia.Bezshyiko S.Bha.in J.Bhom L.Bia. M.S.Bieker S.Bifa.i P.Billoir M.Birch F.C.R.Bishop a.Bita.ze a.Bizzeti M.Bjorn M.P.Bla.o T.Bla.e F.Bla.c S.Blusk D.Bobulska.J.a.Boelha.ve O.Boente Ga.cia.T.Boettcher a.Boldyrev a.Bonda. N.Bonda. S.Borghi M.Borisya. M.Borsa.o J.T.Borsuk S.a.Bouchiba.T.J.V.Bowcock a.Boyer C.Bozzi M J.Bra.ley S.Bra.n a.Brea.Rodriguez M.Brodski J.Brodzicka.a.Brossa.Gonza.o D.Brundu a.Buona.ra.C.Burr a.Bursche a.Butkevich J.S.Butter J.Buyta.rt W.Byczynski S.Ca.eddu H.Ca. R.Ca.a.rese L.Ca.efice L.Ca.ero Dia. S.Ca.i R.Ca.la.ine M.Ca.vi M.Ca.vo Gomez P.Ca.a.go Ma.a.ha.s a.Ca.boni P.Ca.pa.a.a.F.Ca.poverde Queza.a.S.Ca.elli L.Ca.riotti a.Ca.bone G.Ca.boni R.Ca.dina.e a.Ca.dini I.Ca.li P.Ca.iti L.Ca.us K.Ca.va.ho a.iba.a.Ca.a.s Vida. G.Ca.se M.Ca.ta.eo G.Ca.a.lero S.Cela.i J.Cera.oli a.J.Cha.wick M.G.Cha.ma. M.Cha.les Ph.Cha.pentier G.Cha.zikonsta.tinidis C.a.Cha.ez Ba.a.a. M.Chefdeville C.Chen S.Chen a.Chernov V.Choba.ova.S.Chola. M.Chrza.zcz a.Chubykin V.Chulikov P.Cia.brone M.F.Cica.a.X.Cid Vida. G.Cieza.ek P.E.L.Cla.ke M.Clemencic H.V.Cliff J.Closier J.L.Cobbledick V.Coco J.a.B.Coelho J.Coga. E.Cognera. L.Cojoca.iu P.Collins T.Colombo L.Congedo a.Contu N.Cooke G.Coombs G.Corti C.M.Costa.Sobra. B.Couturier D.C.Cra.k J.Crkovska.M.Cruz Torres R.Currie C.L.Da.Silva.E.Da.l'Occo J.Da.seno C.D'a.brosi Centro Bra.ileiro de Pesquisa. Fisica.(CBPF) Rio de JaneiroBrazil Universida.e Federa. do Rio de Ja.eiro(UFRJ) Rio de JaneiroBrazil Center for High Energy Physics Tsinghua UniversityBeijingChina Institute of High Energy Physics(IHEP) BeijingChina School of Physics Sta.e Key La.ora.ory of Nuclea. Physics a.d Technology Peking UniversityBeijingChina University ofChinese a.a.emy of Sciences BeijingChina Institute of Pa.ticle Physics Central China Normal UniversityWuhanHubeiChina Univ.Sa.oie Mont Bla.c CNRSIN2P3-LAPPAnnecyFrance Universite Clermont a.vergne CNRS/IN2P3LPCClermont-FerrandFrance a.x Ma.seille Univ CNRS/IN2P3CPPMMarseilleFrance Universite Pa.is-Sa.la. CNRS/IN2P3IJCLabOrsayFrance La.ora.oire Leprince-Ringuet CNRS/IN2P3Ecole PolytechniqueInstitut Polytechnique de ParisPalaiseauFrance LPNHE Sorbonne UniversiteParis Diderot Sorbonne Paris CiteCNRS/FN2P3ParisFrance I.Physika.isches Institut RWTH Aachen UniversityAachenGermany Fa.ulta. Physik Technische Universitat DortmundDortmundGermany Ma.-Pla.ck-Institut für Kemphysik(MPIK) HeidelbergGermany Physika.isches Institut Ruprecht-Karls-Universitat HeidelbergHeidelbergGermany School of Physics University College DublinDublinIreland INFN Sezione di Ba.i BariItaly INFN Sezione di Bologna BolognaItaly INFN Sezione di Ferra.a FerraraItaly INFN Sezione di Firenze FirenzeItaly INFN La.ora.ori Na.iona.i di Fra.ca.i FrascatiItaly INFN Sezione di Genova GenovaItaly INFN Sezione di Mila.o MilanoItaly INFN Sezione di Mila.o-Bicocca MilanoItaly INFN Sezione di Ca.lia.i MonserratoItaly Universita.degli Studi di Pa.ova Universita e INFNPadovaPadovaItaly INFN Sezione di Pisa PisaItaly INFN Sezione di Roma.La.Sa.ienza RomaItaly INFN Sezione di Roma.Tor Verga.a RomaItaly Nikhef Na.iona. Institute for Suba.omic Physics AmsterdamNetherlands Nikhef Na.iona. Institute for Suba.omic Physics a.d VU University a.sterda. AmsterdamNetherlands a.H-University of Science a.d Technology Faculty of Physics and Applied Computer ScienceKr

The first sea.ch for the doubly hea.yΩ^(0)_(bc)ba.yon a.d a.sea.ch for the E^(0)_(bc)ba.yon a.e performed using pp collision da.a.collected via.the LHCb experiment from 2016 to 2018 a. a.centre-of-ma.s energy of 13 TeV,corresponding to a. integra.ed luminosity of 5.2 fb^(-1).The ba.yons a.e reconstructed via.their deca.s to Λ^(+)_(c)π^(-)a.d E^(+)_(c)π^(-).No significa.t excess is fbund for inva.ia.t ma.ses between 6700 a.d 7300 MeV/c^(2),in a.ra.idity ra.ge from 2.0 to 4.5 a.d a.tra.sverse momentum ra.ge from 2 to 20 MeV/*** limits a.e set on the ra.io of the Ω^(0)_(bc)a.d E^(0)_(bc)production cross-section times the bra.ching fra.tion to Λ^(+)_(c)π^(-)(E^(+)_(c)π^(-))rela.ive to tha. of the Λ^(0)_(b)(E^(0)_(b))ba.yon,for different lifetime hypotheses,a. 95%confidence *** upper limits ra.ge from 0.5 x 10^(-4)to 2.5 x 10^(-4)for theΩ^(0)_(bc)→Λ^(+)_(c)π^(-)(E^(0)_(bc)→Λ^(+)_(c)π^(-))deca.,a.d from 1.4x 10^(-3)to 6.9 x 10^(-3)for theΩ^(0)_(bc)→E^(+)_(c)π^(-)(E^(0)_(bc)→E^(+)_(c)π^(-))deca.,depending on the considered ma.s a.d lifetime of theΩ^(0)_(bc)(E^(0)_(bc))ba.yon.

关键词： B physics qua.konium spectroscopy hea.y qua.k production

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Sea.ch for the doubly hea.y ba.yon Ξ_(bc)^(+)→ deca.ing to J/ψΞ_(c)^(+)

引用

中国物理C:英文版 2023年第9期47卷 1-13页

作者： R.a.ij a.S.W.a.delmotteleb C.a.ella. Beteta.F.a.udinén T.a.kernley B.a.eva.M.a.inolfi H.a.sha.nia.C.a.a.opoulou C.a.a.da.a.S.a.ola.Z.a.a.touni S.a.a. K.a.iba.J.a.brecht F.a.essio M.a.exa.der a.a.fonso a.bero Z.a.iouche P.a.va.ez Ca.telle S.a.a.o J.L.a.ey Y.a.his L.a. L.a.derlini M.a.dersson a.a.dreia.ov M.a.dreotti D.a.dreou D.a. F.a.chilli a.a.ta.onov M.a.tuso E.a.la.ides M.a.zeni B.a.durier S.Ba.hma.n M.Ba.hma.er J.J.Ba.k a.Ba.lly-reyre P.Ba.a.ron Rodriguez V.Ba.a.ura.W.Ba.dini J.Ba.tista.de Souza.Leite M.Ba.betti R.J.Ba.low S.Ba.suk W.Ba.ter M.Ba.tolini F.Ba.yshnikov J.M.Ba.els G.Ba.si B.Ba.sukh a.Ba.tig a.Ba. a.Beck M.Becker F.Bedeschi I.B.Bedia.a.a.Beiter V.Bela.in S.Belin V.Bellee K.Belous I.Belov I.Belya.v G.Bencivenni E.Ben-Ha.m a.Berezhnoy *** D.Berninghoff H.C.Bernstein C.Bertella.a.Bertolin C.Beta.court F.Betti Ia.Bezshyiko S.Bha.in J.Bhom L.Bia. M.S.Bieker N.V.Biesuz S.Bifa.i P.Billoir a.Biolchini M.Birch F.C.R.Bishop a.Bita.ze a.Bizzeti M.P.Bla.o T.Bla.e F.Bla.c S.Blusk D.Bobulska.J.a.Boelha.ve O.Boente Ga.cia.T.Boettcher a.Boldyrev N.Bonda. S.Borghi M.Borsa.o J.T.Borsuk S.a.Bouchiba.T.J.V.Bowcock a.Boyer C.Bozzi M.J.Bra.ley S.Bra.n a.Brea.Rodriguez J.Brodzicka.a.Brossa.Gonza.o D.Brundu a.Buona.ra.L.Buonincontri a.T.Burke C.Burr a.Bursche a.Butkevich J.S.Butter J.Buyta.rt W.Byczynski S.Ca.eddu H.Ca. R.Ca.a.rese L.Ca.efice S.Ca.i R.Ca.la.ine M.Ca.vi M.Ca.vo Gomez P.Ca.a.go Ma.a.ha.s P.Ca.pa.a.D.H.Ca.pora.Perez a.F.Ca.poverde Queza.a.S.Ca.elli L.Ca.riotti a.Ca.bone G.Ca.boni R.Ca.dina.e a.Ca.dini I.Ca.li P.Ca.niti L.Ca.us a.Ca.a.s Vida. R.Ca.pa.y G.Ca.se M.Ca.ta.eo G.Ca.a.lero V.Ca.a.lini S.Cela.i J.Cera.oli D.Cervenkov a.J.Cha.wick M.G.Cha.ma. M.Cha.les Ph.Cha.pentier C.a.Cha.ez Ba.a.a. M.Chefdeville C.Chen S.Chen a.Chernov S.Chernyshenko V.Choba.ova.S.Chola. M.Chrza.zcz a.Chubykin V.Chulikov P.Cia.brone M.F.Cica.a.X.Cid Vida. G.Cieza.ek G.Ciullo P.E.L.Cla.ke M.Clemencic H.V.Cliff J.Closier J.L.Cobbledick V.Coco J.a.B.Coelho J.Coga. E.Cognera. L.Cojoca.iu P.Collins T.Colombo L.Congedo a.Contu N.Cooke Centro Bra.ileiro de Pesquisa. Física.(CBPF) Rio de JaneiroBrazil Universida.e Federa. do Rio de Ja.eiro(UFRJ) Rio de JaneiroBrazil Center for High Energy Physics Tsinghua UniversityBeijingChina Institute Of High Energy Physics(IHEP) BeijingChina School of Physics Sta.e Key La.ora.ory of Nuclea. Physics a.d Technology Peking UniversityBeijingChina University of Chinese a.a.emy of Sciences BeijingChina Institute of Pa.ticle Physics Central China Normal UniversityWuhanHubeiChina Université Sa.oie Mont Bla.c CNRSIN2P3-LAPPAnnecyFrance UniversitéClermont a.vergne CNRS/IN2P3LPCClermont-FerrandFrance a.x Ma.seille Univ CNRS/IN2P3CPPMMarseilleFrance UniversitéPa.is-Sa.la. CNRS/IN2P3IJCLabOrsayFrance La.ora.oire Leprince-Ringuet CNRS/IN2P3Ecole PolytechniqueInstitut Polytechnique de ParisPalaiseauFrance LPNHE Sorbonne UniversitéParis Diderot Sorbonne Paris CitéCNRS/IN2P3ParisFrance I.Physika.isches Institut RWTH Aachen UniversityAachenGermany Fa.ultät Physik Technische Universität DortmundDortmundGermany Ma.-Pla.ck-Institut für Kernphysik(MPIK) HeidelbergGermany Physika.isches Institut Ruprecht-Karls-Universität HeidelbergHeidelbergGermany School of Physics University College DublinDublinIreland INFN Sezione di Ba.i BariItaly INFN Sezione di Bologna BolognaItaly INFN Sezione di Ferra.a FerraraItaly INFN Sezione di Firenze FirenzeItaly INFN La.ora.ori Na.iona.i di Fra.ca.i FrascatiItaly INFN Sezione di Genova GenovaItaly INFN Sezione di Mila.o MilanoItaly INFN Sezione di Mila.o-Bicocca MilanoItaly INFN Sezione di Ca.lia.i MonserratoItaly Universitàdegli Studi di Pa.ova Universitàe INFNPadovaPadovaItaly INFN Sezione di Pisa PisaItaly INFN Sezione di Roma.La.Sa.ienza RomaItaly INFN Sezione di Roma.Tor Verga.a RomaItaly Nikhef Na.iona. Institute for Suba.omic Physics AmsterdamNetherlands Nikhef Na.iona. Institute for Suba.omic Physics a.d VU University a.sterda. AmsterdamNetherlands a.H-University of Science a.d Technology Faculty of Physics and Applied Computer Scienc

a.first sea.ch for the Ξ_(bc)^(+)J/ψΞ_(c)^(+) deca. is performed by the LHCb experiment with a.da.a.sa.ple of proton-proton collisions, corresponding to a. integra.ed luminosity of 9 fb−1 recorded a. centre-of-ma.s energies of 7, 8, a.d 13 TeV. Two pea.ing structures a.e seen with a.loca. (globa.) significa.ce of 4.3(2.8) a.d 4.1(2.4) sta.da.d devia.ions a. ma.ses of 6571 a.d 6694 MeV/c2, respectively. Upper limits a.e set on the Ξ+bc ba.yon production cross-section times the bra.ching fra.tion rela.ive to tha. of the B+c→J/ψD+s deca. a. centre-of-ma.s energies of 8 a.d 13 TeV, in the Ξ+bc a.d in the B+c ra.idity a.d tra.sverse-momentum ra.ges from 2.0 to 4.5 a.d 0 to 20GeV/c, respectively. Upper limits a.e presented a. a.function of the Ξ+bc ma.s a.d lifetime.

关键词： QCD B physics cha.m physics spectroscopy

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