Search for the doubly heavy baryons Xibc and Omegabc decaying to Lc-pi and Xic-pi
LHCb collaboration R. Aaij,C. Abell'an Beteta,T. Ackernley,B. Adeva,M. Adinolfi,H. Afsharnia,C. A. Aidala,S. Aiola,Z. Ajaltouni,S. Akar,P. Albicocco,J. Albrecht,F. Alessio,M. Alexander,A. Alfonso Albero,G. Alkhazov,P. Alvarez Cartelle,A. A. Alves,S. Amato,Y. Amhis,L. An,L. Anderlini,G. Andreassi,M. Andreotti,F. Archilli,J. Arnau Romeu,A. Artamonov,M. Artuso,K. Arzymatov,E. Aslanides,M. Atzeni,B. Audurier,S. Bachmann,J. J. Back,S. Baker,V. Balagura,W. Baldini,A. Baranov,R. J. Barlow,S. Barsuk,W. Barter,M. Bartolini,F. Baryshnikov,G. Bassi,V. Batozskaya,B. Batsukh,A. Battig,A. Bay,M. Becker,F. Bedeschi,I. Bediaga,A. Beiter,L. J. Bel,V. Belavin,S. Belin,V. Bellee,K. Belous,I. Belyaev,G. Bencivenni,E. Ben-Haim,S. Benson,S. Beranek,A. Berezhnoy,R. Bernet,D. Berninghoff,H. C. Bernstein,C. Bertella,E. Bertholet,A. Bertolin,C. Betancourt,F. Betti,M. O. Bettler,Ia. Bezshyiko,S. Bhasin,J. Bhom,M. S. Bieker,S. Bifani,P. Billoir,A. Bizzeti,M. Bjorn,M. P. Blago,T. Blake,F. Blanc,S. Blusk,D. Bobulska,V. Bocci,O. Boente Garcia,T. Boettcher,A. Boldyrev,A. Bondar,N. Bondar,S. Borghi,M. Borisyak,M. Borsato,J. T. Borsuk,T.J.V. Bowcock,C. Bozzi,M. J. Bradley,S. Braun,A. Brea Rodriguez,M. Brodski,J. Brodzicka,A. Brossa Gonzalo,D. Brundu,E. Buchanan,A. Buonaura,C. Burr,A. Bursche,J. S. Butter,J. Buytaert,W. Byczynski,S. Cadeddu,H. Cai,R. Calabrese,L. Calero Diaz,S. Cali,R. Calladine,M. Calvi,M. Calvo Gomez,P. Camargo Magalhaes,A. Camboni,P. Campana,D. H. Campora Perez,L. Capriotti,A. Carbone,G. Carboni,R. Cardinale,A. Cardini,P. Carniti,K. Carvalho Akiba,A. Casais Vidal,G. Casse,M. Cattaneo,G. Cavallero,S. Celani,R. Cenci,J. Cerasoli,M. G. Chapman,M. Charles,Ph. Charpentier,G. Chatzikonstantinidis,M. Chefdeville,V. Chekalina,C. Chen,S. Chen,A. Chernov,S.-G. Chitic,V. Chobanova,M. Chrzaszcz,A. Chubykin,P. Ciambrone,M. F. Cicala,X. Cid Vidal,G. Ciezarek,F. Cindolo,P.E.L. Clarke,M. Clemencic,H. V. Cliff,J. Closier,J. L. Cobbledick,V. Coco,J.A.B. Coelho,J. Cogan,E. Cogneras,L. Cojocariu,P. Collins,T. Colombo,A. Comerma-Montells,A. Contu,N. Cooke,G. Coombs,S. Coquereau,G. Corti,C. M. Costa Sobral,B. Couturier,D. C. Craik,J. Crkovska,A. Crocombe,M. Cruz Torres,R. Currie,C. L. Da Silva,E. Dall'Occo,J. Dalseno,C. D'Ambrosio,A. Danilina,P. d'Argent,A. Davis,O. De Aguiar Francisco,K. De Bruyn,S. De Capua,M. De Cian,J. M. De Miranda,L. De Paula,M. De Serio,P. De Simone,J. A. de Vries,C. T. Dean,W. Dean,D. Decamp,L. Del Buono,B. Delaney,H.-P. Dembinski,M. Demmer,A. Dendek,V. Denysenko,D. Derkach,O. Deschamps,F. Desse,F. Dettori,B. Dey,A. Di Canto,P. Di Nezza,S. Didenko,H. Dijkstra,V. Dobishuk,F. Dordei,M. Dorigo,A. C. dos Reis,L. Douglas,A. Dovbnya,K. Dreimanis,M. W. Dudek,L. Dufour,G. Dujany,P. Durante,J. M. Durham,D. Dutta,M. Dziewiecki,A. Dziurda,A. Dzyuba,S. Easo,U. Egede,V. Egorychev,S. Eidelman,S. Eisenhardt,R. Ekelhof,S. Ek-In,L. Eklund,S. Ely,A. Ene,E. Epple,S. Escher,S. Esen,T. Evans,A. Falabella,J. Fan,N. Farley,S. Farry,D. Fazzini,P. Fedin,M. F'eo,P. Fernandez Declara,A. Fernandez Prieto,F. Ferrari,L. Ferreira Lopes,F. Ferreira Rodrigues,S. Ferreres Sole,M. Ferrillo,M. Ferro-Luzzi,S. Filippov,R. A. Fini,M. Fiorini,M. Firlej,K. M. Fischer,C. Fitzpatrick,T. Fiutowski,F. Fleuret,M. Fontana,F. Fontanelli,R. Forty,V. Franco Lima,M. Franco Sevilla,M. Frank,C. Frei,D. A. Friday,J. Fu, M. Fuehring,W. Funk,E. Gabriel,A. Gallas Torreira,D. Galli,S. Gallorini,S. Gambetta,Y. Gan,M. Gandelman,P. Gandini,Y. Gao,L. M. Garcia Martin,J. Garc'ia Pardinas,B. Garcia Plana,F. A. Garcia Rosales,J. Garra Tico,L. Garrido,D. Gascon,C. Gaspar,D. Gerick,E. Gersabeck,M. Gersabeck,T. Gershon,D. Gerstel,Ph. Ghez,V. Gibson,A. Gioventu,O. G. Girard,P. Gironella Gironell,L. Giubega,C. Giugliano,K. Gizdov,V. V. Gligorov,C. Gobel,D. Golubkov,A. Golutvin,A. Gomes,P. Gorbounov,I. V. Gorelov,C. Gotti,E. Govorkova,J. P. Grabowski,R. Graciani Diaz,T. Grammatico,L. A. Granado Cardoso,E. Graug'es,E. Graverini,G. Graziani,A. Grecu,R. Greim,P. Griffith,L. Grillo,L. Gruber,B. R. Gruberg Cazon,C. Gu,E. Gushchin,A. Guth,Yu. Guz,T. Gys,P. A. Gunther,T. Hadavizadeh,G. Haefeli,C. Haen,S. C. Haines,P. M. Hamilton,Q. Han,X. Han,T. H. Hancock,S. Hansmann-Menzemer,N. Harnew,T. Harrison,R. Hart,C. Hasse,M. Hatch,J. He,M. Hecker,K. Heijhoff,K. Heinicke,A. Heister,A. M. Hennequin,K. Hennessy,L. Henry,J. Heuel,A. Hicheur,D. Hill,M. Hilton,P. H. Hopchev,J. Hu,W. Hu,W. Huang,W. Hulsbergen,T. Humair,R. J. Hunter,M. Hushchyn,D. Hutchcroft,D. Hynds,P. Ibis,M. Idzik,P. Ilten,A. Inglessi,A. Inyakin,K. Ivshin,R. Jacobsson,S. Jakobsen,E. Jans,B. K. Jashal,A. Jawahery,V. Jevtic,F. Jiang,M. John,D. Johnson,C. R. Jones,B. Jost,N. Jurik,S. Kandybei,M. Karacson,J. M. Kariuki,N. Kazeev,M. Kecke,F. Keizer,M. Kelsey,M. Kenzie,T. Ketel,B. Khanji,A. Kharisova,K. E. Kim,T. Kirn,V. S. Kirsebom,S. Klaver,K. Klimaszewski,S. Koliiev,A. Kondybayeva,A. Konoplyannikov,P. Kopciewicz,R. Kopecna,P. Koppenburg,I. Kostiuk,O. Kot,S. Kotriakhova,L. Kravchuk,R. D. Krawczyk,M. Kreps,F. Kress,S. Kretzschmar,P. Krokovny,W. Krupa,W. Krzemien,W. Kucewicz,M. Kucharczyk,V. Kudryavtsev,H. S. Kuindersma,G. J. Kunde,T. Kvaratskheliya,D. Lacarrere,G. Lafferty,A. Lai,D. Lancierini,J. J. Lane,G. Lanfranchi,C. Langenbruch,O. Lantwin,T. Latham,F. Lazzari,C. Lazzeroni,R. Le Gac,R. Lefevre,A. Leflat,O. Leroy,T. Lesiak,B. Leverington,H. Li,X. Li,Y. Li,Z. Li,X. Liang,R. Lindner,V. Lisovskyi,G. Liu,X. Liu,D. Loh,A. Loi,J. Lomba Castro,I. Longstaff,J. H. Lopes,G. Loustau,G. H. Lovell,Y. Lu,D. Lucchesi,M. Lucio Martinez,Y. Luo,A. Lupato,E. Luppi,O. Lupton,A. Lusiani,X. Lyu,S. Maccolini,F. Machefert,F. Maciuc,V. Macko,P. Mackowiak,S. Maddrell-Mander,L. R. Madhan Mohan,O. Maev,A. Maevskiy,D. Maisuzenko,M. W. Majewski,S. Malde,B. Malecki,A. Malinin,T. Maltsev,H. Malygina,G. Manca,G. Mancinelli,R. Manera Escalero,D. Manuzzi,D. Marangotto,J. Maratas,J. F. Marchand,U. Marconi,S. Mariani,C. Marin Benito,M. Marinangeli,P. Marino,J. Marks,P. J. Marshall,G. Martellotti,L. Martinazzoli,M. Martinelli,D. Martinez Santos,F. Martinez Vidal,A. Massafferri,M. Materok,R. Matev,A. Mathad,Z. Mathe,V. Matiunin,C. Matteuzzi,K. R. Mattioli,A. Mauri,E. Maurice,M. McCann,L. Mcconnell,A. McNab,R. McNulty,J. V. Mead,B. Meadows,C. Meaux,G. Meier,N. Meinert,D. Melnychuk,S. Meloni,M. Merk,A. Merli,M. Mikhasenko,D. A. Milanes,E. Millard,M.-N. Minard,O. Mineev,L. Minzoni,S. E. Mitchell,B. Mitreska,D. S. Mitzel,A. Modden,A. Mogini,R. D. Moise,T. Mombacher,I. A. Monroy,S. Monteil,M. Morandin,G. Morello,M. J. Morello,J. Moron,A. B. Morris, A. G. Morris,R. Mountain,H. Mu,F. Muheim,M. Mukherjee,M. Mulder,D. Muller,K. Muller,V. Muller,C. H. Murphy,D. Murray,P. Muzzetto,P. Naik,T. Nakada,R. Nandakumar,A. Nandi,T. Nanut,I. Nasteva,M. Needham,N. Neri,S. Neubert,N. Neufeld,R. Newcombe,T. D. Nguyen,C. Nguyen-Mau,E. M. Niel,S. Nieswand,N. Nikitin,N. S. Nolte,C. Nunez,A. Oblakowska-Mucha,V. Obraztsov,S. Ogilvy,D. P. O'Hanlon,R. Oldeman,C.J.G. Onderwater,J. D. Osborn,A. Ossowska,J. M. Otalora Goicochea,T. Ovsiannikova,P. Owen,A. Oyanguren,P. R. Pais,T. Pajero,A. Palano,M. Palutan,G. Panshin,A. Papanestis,M. Pappagallo,L. L. Pappalardo,C. Pappenheimer,W. Parker,C. Parkes,G. Passaleva,A. Pastore,M. Patel,C. Patrignani,A. Pearce,A. Pellegrino,M. Pepe Altarelli,S. Perazzini,D. Pereima,P. Perret,L. Pescatore,K. Petridis,A. Petrolini,A. Petrov,S. Petrucci,M. Petruzzo,B. Pietrzyk,G. Pietrzyk,M. Pili,D. Pinci,J. Pinzino,F. Pisani,A. Piucci,V. Placinta,S. Playfer,J. Plews,M. Plo Casasus,F. Polci,M. Poli Lener,M. Poliakova,A. Poluektov,N. Polukhina,I. Polyakov,E. Polycarpo,G. J. Pomery,S. Ponce,A. Popov,D. Popov,S. Poslavskii,K. Prasanth,L. Promberger,C. Prouve,V. Pugatch,A. Puig Navarro,H. Pullen,G. Punzi,W. Qian,J. Qin,R. Quagliani,B. Quintana,N. V. Raab,R. I. Rabadan Trejo,B. Rachwal,J. H. Rademacker,M. Rama,M. Ramos Pernas,M. S. Rangel,F. Ratnikov,G. Raven,M. Reboud,F. Redi,F. Reiss,C. Remon Alepuz,Z. Ren,V. Renaudin,S. Ricciardi,S. Richards,K. Rinnert,P. Robbe,A. Robert,A. B. Rodrigues,E. Rodrigues,J. A. Rodriguez Lopez, M. Roehrken,S. Roiser,A. Rollings,V. Romanovskiy,M. Romero Lamas,A. Romero Vidal,J. D. Roth,M. Rotondo,M. S. Rudolph,T. Ruf,J. Ruiz Vidal,J. Ryzka,J. J. Saborido Silva,N. Sagidova,B. Saitta,C. Sanchez Gras,C. Sanchez Mayordomo,R. Santacesaria,C. Santamarina Rios,M. Santimaria,E. Santovetti,G. Sarpis,A. Sarti,C. Satriano,A. Satta,M. Saur,D. Savrina,L. G. Scantlebury Smead,S. Schael,M. Schellenberg,M. Schiller,H. Schindler,M. Schmelling,T. Schmelzer,B. Schmidt,O. Schneider,A. Schopper,H. F. Schreiner,M. Schubiger,S. Schulte,M. H. Schune,R. Schwemmer,B. Sciascia,A. Sciubba,S. Sellam,A. Semennikov,A. Sergi,N. Serra,J. Serrano,L. Sestini,A. Seuthe,P. Seyfert,D. M. Shangase,M. Shapkin,L. Shchutska,T. Shears,L. Shekhtman,V. Shevchenko,E. Shmanin,J. D. Shupperd,B. G. Siddi,R. Silva Coutinho,L. Silva de Oliveira,G. Simi,S. Simone,I. Skiba,N. Skidmore,T. Skwarnicki,M. W. Slater,J. G. Smeaton,A. Smetkina,E. Smith,I. T. Smith,M. Smith,A. Snoch,M. Soares,L. 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Vilasis-Cardona, A. Vitkovskiy, V. Volkov,A. Vollhardt,D. Vom Bruch,A. Vorobyev,V. Vorobyev,N. Voropaev,R. Waldi,J. Walsh,J. Wang,M. Wang,Y. Wang,Z. Wang,D. R. Ward,H. M. Wark,N. K. Watson,D. Websdale, A. Weiden,C. Weisser,B.D.C. Westhenry,D. J. White,M. Whitehead,D. Wiedner,G. Wilkinson,M. Wilkinson,I. Williams,M. Williams, M.R.J. Williams,T. Williams,F. F. Wilson,W. Wislicki,M. Witek,L. Witola,G. Wormser,S. A. Wotton,H. Wu,K. Wyllie,Z. Xiang,D. Xiao,Y. Xie, H. Xing,A. Xu,L. Xu,M. Xu,Q. Xu,Z. Xu,Z. Yang,Y. Yao,L. E. Yeomans,H. Yin,J. Yu,X. Yuan,O. Yushchenko,K. A. Zarebski,M. Zavertyaev,M. Zdybal,M. Zeng,D. Zhang,L. Zhang,S. Zhang,W. C. Zhang,Y. Zhang,A. Zhelezov,Y. Zheng,X. Zhou,Y. Zhou,X. Zhu,V. Zhukov,J. B. Zonneveld,S. Zucchelli
semanticscholar(2021)
Cited 0|Views22
Abstract
A search for the doubly heavy baryons Ξ0 bc and Ω 0 bc is performed using pp collision data collected with the LHCb experiment from 2016 to 2018 at a centre-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 5.2 fb−1. The baryons are reconstructed via their decays to Λc π − and Ξ+ c π −. No significant excess is found for invariant masses between 6700 and 7300 MeV/c2, in the rapidity range from 2.0 to 4.5 and the transverse momentum range from 2 to 20 GeV/c. Upper limits are set on the ratio of the Ξ0 bc and Ω 0 bc production cross-section times its branching fraction to Λc π − (Ξ+ c π −) relative to that of the Λb (Ξ 0 b ) baryon, for different lifetime hypotheses, at 95% confidence level. The upper limits range from 0.5× 10−4 to 2.5 × 10−4 for the Ξ0 bc → Λc π− (Ω0 bc → Λc π−) decay, and from 1.4 × 10−3 to 6.9× 10−3 for the Ξ0 bc → Ξ+ c π− (Ω0 bc → Ξ+ c π−) decay, depending on the considered mass and lifetime of the Ξ0 bc (Ω 0 bc) baryon.
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