首次观测到激发态的Ω<sub>b</sub><sup>-</sup>粒子态。
First Observation of Excited Ω_{b}^{-} States.
作者信息
Aaij R, Abellán Beteta C, Ackernley T, Adeva B, Adinolfi M, Afsharnia H, Aidala C A, Aiola S, Ajaltouni Z, Akar S, Albicocco P, Albrecht J, Alessio F, Alexander M, Alfonso Albero A, Alkhazov G, Alvarez Cartelle P, Alves A A, Amato S, Amhis Y, An L, Anderlini L, Andreassi G, Andreotti M, Archilli F, Arnau Romeu J, Artamonov A, Artuso M, Arzymatov K, Aslanides E, Atzeni M, Audurier B, Bachmann S, Back J J, Baker S, Balagura V, Baldini W, Baranov A, Barlow R J, Barsuk S, Barter W, Bartolini M, Baryshnikov F, Bassi G, Batozskaya V, Batsukh B, Battig A, Bay A, Becker M, Bedeschi F, Bediaga I, Beiter A, Bel L J, Belavin V, Belin S, Bellee V, Belous K, Belyaev I, Bencivenni G, Ben-Haim E, Benson S, Beranek S, Berezhnoy A, Bernet R, Berninghoff D, Bernstein H C, Bertella C, Bertholet E, Bertolin A, Betancourt C, Betti F, Bettler M O, Bezshyiko Ia, Bhasin S, Bhom J, Bieker M S, Bifani S, Billoir P, Bizzeti A, Bjørn M, Blago M P, Blake T, Blanc F, Blusk S, Bobulska D, Bocci V, Boente Garcia O, Boettcher T, Boldyrev A, Bondar A, Bondar N, Borghi S, Borisyak M, Borsato M, Borsuk J T, Bowcock T J V, Bozzi C, Bradley M J, Braun S, Brea Rodriguez A, Brodski M, Brodzicka J, Brossa Gonzalo A, Brundu D, Buchanan E, Buonaura A, Burr C, Bursche A, Butter J S, Buytaert J, Byczynski W, Cadeddu S, Cai H, Calabrese R, Calero Diaz L, Cali S, Calladine R, Calvi M, Calvo Gomez M, Camargo Magalhaes P, Camboni A, Campana P, Campora Perez D H, Capriotti L, Carbone A, Carboni G, Cardinale R, Cardini A, Carniti P, Carvalho Akiba K, Casais Vidal A, Casse G, Cattaneo M, Cavallero G, Celani S, Cenci R, Cerasoli J, Chapman M G, Charles M, Charpentier Ph, Chatzikonstantinidis G, Chefdeville M, Chekalina V, Chen C, Chen S, Chernov A, Chitic S-G, Chobanova V, Chrzaszcz M, Chubykin A, Ciambrone P, Cicala M F, Cid Vidal X, Ciezarek G, Cindolo F, Clarke P E L, Clemencic M, Cliff H V, Closier J, Cobbledick J L, Coco V, Coelho J A B, Cogan J, Cogneras E, Cojocariu L, Collins P, Colombo T, Comerma-Montells A, Contu A, Cooke N, Coombs G, Coquereau S, Corti G, Costa Sobral C M, Couturier B, Craik D C, Crkovska J, Crocombe A, Cruz Torres M, Currie R, Da Silva C L, Dall'Occo E, Dalseno J, D'Ambrosio C, Danilina A, d'Argent P, Davis A, De Aguiar Francisco O, De Bruyn K, De Capua S, De Cian M, De Miranda J M, De Paula L, De Serio M, De Simone P, de Vries J A, Dean C T, Dean W, Decamp D, Del Buono L, Delaney B, Dembinski H-P, Demmer M, Dendek A, Denysenko V, Derkach D, Deschamps O, Desse F, Dettori F, Dey B, Di Canto A, Di Nezza P, Didenko S, Dijkstra H, Dobishuk V, Dordei F, Dorigo M, Dos Reis A C, Douglas L, Dovbnya A, Dreimanis K, Dudek M W, Dufour L, Dujany G, Durante P, Durham J M, Dutta D, Dziewiecki M, Dziurda A, Dzyuba A, Easo S, Egede U, Egorychev V, Eidelman S, Eisenhardt S, Ekelhof R, Ek-In S, Eklund L, Ely S, Ene A, Epple E, Escher S, Esen S, Evans T, Falabella A, Fan J, Farley N, Farry S, Fazzini D, Fedin P, Féo M, Fernandez Declara P, Fernandez Prieto A, Ferrari F, Ferreira Lopes L, Ferreira Rodrigues F, Ferreres Sole S, Ferrillo M, Ferro-Luzzi M, Filippov S, Fini R A, Fiorini M, Firlej M, Fischer K M, Fitzpatrick C, Fiutowski T, Fleuret F, Fontana M, Fontanelli F, Forty R, Franco Lima V, Franco Sevilla M, Frank M, Frei C, Friday D A, Fu J, Fuehring M, Funk W, Gabriel E, Gallas Torreira A, Galli D, Gallorini S, Gambetta S, Gan Y, Gandelman M, Gandini P, Gao Y, Garcia Martin L M, García Pardiñas J, Garcia Plana B, Garcia Rosales F A, Garra Tico J, Garrido L, Gascon D, Gaspar C, Gerick D, Gersabeck E, Gersabeck M, Gershon T, Gerstel D, Ghez Ph, Gibson V, Gioventù A, Girard O G, Gironella Gironell P, Giubega L, Giugliano C, Gizdov K, Gligorov V V, Göbel C, Golubkov D, Golutvin A, Gomes A, Gorbounov P, Gorelov I V, Gotti C, Govorkova E, Grabowski J P, Graciani Diaz R, Grammatico T, Granado Cardoso L A, Graugés E, Graverini E, Graziani G, Grecu A, Greim R, Griffith P, Grillo L, Gruber L, Gruberg Cazon B R, Gu C, Gushchin E, Guth A, Guz Yu, Gys T, Günther P A, Hadavizadeh T, Haefeli G, Haen C, Haines S C, Hamilton P M, Han Q, Han X, Hancock T H, Hansmann-Menzemer S, Harnew N, Harrison T, Hart R, Hasse C, Hatch M, He J, Hecker M, Heijhoff K, Heinicke K, Heister A, Hennequin A M, Hennessy K, Henry L, Heuel J, Hicheur A, Hill D, Hilton M, Hopchev P H, Hu J, Hu W, Huang W, Hulsbergen W, Humair T, Hunter R J, Hushchyn M, Hutchcroft D, Hynds D, Ibis P, Idzik M, Ilten P, Inglessi A, Inyakin A, Ivshin K, Jacobsson R, Jakobsen S, Jans E, Jashal B K, Jawahery A, Jevtic V, Jiang F, John M, Johnson D, Jones C R, Jost B, Jurik N, Kandybei S, Karacson M, Kariuki J M, Kazeev N, Kecke M, Keizer F, Kelsey M, Kenzie M, Ketel T, Khanji B, Kharisova A, Kim K E, Kirn T, Kirsebom V S, Klaver S, Klimaszewski K, Koliiev S, Kondybayeva A, Konoplyannikov A, Kopciewicz P, Kopecna R, Koppenburg P, Kostiuk I, Kot O, Kotriakhova S, Kravchuk L, Krawczyk R D, Kreps M, Kress F, Kretzschmar S, Krokovny P, Krupa W, Krzemien W, Kucewicz W, Kucharczyk M, Kudryavtsev V, Kuindersma H S, Kunde G J, Kvaratskheliya T, Lacarrere D, Lafferty G, Lai A, Lancierini D, Lane J J, Lanfranchi G, Langenbruch C, Lantwin O, Latham T, Lazzari F, Lazzeroni C, Le Gac R, Lefèvre R, Leflat A, Leroy O, Lesiak T, Leverington B, Li H, Li X, Li Y, Li Z, Liang X, Lindner R, Lisovskyi V, Liu G, Liu X, Loh D, Loi A, Lomba Castro J, Longstaff I, Lopes J H, Loustau G, Lovell G H, Lu Y, Lucchesi D, Lucio Martinez M, Luo Y, Lupato A, Luppi E, Lupton O, Lusiani A, Lyu X, Maccolini S, Machefert F, Maciuc F, Macko V, Mackowiak P, Maddrell-Mander S, Madhan Mohan L R, Maev O, Maevskiy A, Maisuzenko D, Majewski M W, Malde S, Malecki B, Malinin A, Maltsev T, Malygina H, Manca G, Mancinelli G, Manera Escalero R, Manuzzi D, Marangotto D, Maratas J, Marchand J F, Marconi U, Mariani S, Marin Benito C, Marinangeli M, Marino P, Marks J, Marshall P J, Martellotti G, Martinazzoli L, Martinelli M, Martinez Santos D, Martinez Vidal F, Massafferri A, Materok M, Matev R, Mathad A, Mathe Z, Matiunin V, Matteuzzi C, Mattioli K R, Mauri A, Maurice E, McCann M, Mcconnell L, McNab A, McNulty R, Mead J V, Meadows B, Meaux C, Meier G, Meinert N, Melnychuk D, Meloni S, Merk M, Merli A, Mikhasenko M, Milanes D A, Millard E, Minard M-N, Mineev O, Minzoni L, Mitchell S E, Mitreska B, Mitzel D S, Mödden A, Mogini A, Moise R D, Mombächer T, Monroy I A, Monteil S, Morandin M, Morello G, Morello M J, Moron J, Morris A B, Morris A G, Mountain R, Mu H, Muheim F, Mukherjee M, Mulder M, Müller D, Müller K, Müller V, Murphy C H, Murray D, Muzzetto P, Naik P, Nakada T, Nandakumar R, Nandi A, Nanut T, Nasteva I, Needham M, Neri N, Neubert S, Neufeld N, Newcombe R, Nguyen T D, Nguyen-Mau C, Niel E M, Nieswand S, Nikitin N, Nolte N S, Nunez C, Oblakowska-Mucha A, Obraztsov V, Ogilvy S, O'Hanlon D P, Oldeman R, Onderwater C J G, Osborn J D, Ossowska A, Otalora Goicochea J M, Ovsiannikova T, Owen P, Oyanguren A, Pais P R, Pajero T, Palano A, Palutan M, Panshin G, Papanestis A, Pappagallo M, Pappalardo L L, Pappenheimer C, Parker W, Parkes C, Passaleva G, Pastore A, Patel M, Patrignani C, Pearce A, Pellegrino A, Pepe Altarelli M, Perazzini S, Pereima D, Perret P, Pescatore L, Petridis K, Petrolini A, Petrov A, Petrucci S, Petruzzo M, Pietrzyk B, Pietrzyk G, Pili M, Pinci D, Pinzino J, Pisani F, Piucci A, Placinta V, Playfer S, Plews J, Plo Casasus M, Polci F, Poli Lener M, Poliakova M, Poluektov A, Polukhina N, Polyakov I, Polycarpo E, Pomery G J, Ponce S, Popov A, Popov D, Poslavskii S, Prasanth K, Promberger L, Prouve C, Pugatch V, Puig Navarro A, Pullen H, Punzi G, Qian W, Qin J, Quagliani R, Quintana B, Raab N V, Rabadan Trejo R I, Rachwal B, Rademacker J H, Rama M, Ramos Pernas M, Rangel M S, Ratnikov F, Raven G, Reboud M, Redi F, Reiss F, Remon Alepuz C, Ren Z, Renaudin V, Ricciardi S, Richards S, Rinnert K, Robbe P, Robert A, Rodrigues A B, Rodrigues E, Rodriguez Lopez J A, Roehrken M, Roiser S, Rollings A, Romanovskiy V, Romero Lamas M, Romero Vidal A, Roth J D, Rotondo M, Rudolph M S, Ruf T, Ruiz Vidal J, Ryzka J, Saborido Silva J J, Sagidova N, Saitta B, Sanchez Gras C, Sanchez Mayordomo C, Santacesaria R, Santamarina Rios C, Santimaria M, Santovetti E, Sarpis G, Sarti A, Satriano C, Satta A, Saur M, Savrina D, Scantlebury Smead L G, Schael S, Schellenberg M, Schiller M, Schindler H, Schmelling M, Schmelzer T, Schmidt B, Schneider O, Schopper A, Schreiner H F, Schubiger M, Schulte S, Schune M H, Schwemmer R, Sciascia B, Sciubba A, Sellam S, Semennikov A, Sergi A, Serra N, Serrano J, Sestini L, Seuthe A, Seyfert P, Shangase D M, Shapkin M, Shchutska L, Shears T, Shekhtman L, Shevchenko V, Shmanin E, Shupperd J D, Siddi B G, Silva Coutinho R, Silva de Oliveira L, Simi G, Simone S, Skiba I, Skidmore N, Skwarnicki T, Slater M W, Smeaton J G, Smetkina A, Smith E, Smith I T, Smith M, Snoch A, Soares M, Soares Lavra L, Sokoloff M D, Soler F J P, Souza De Paula B, Spaan B, Spadaro Norella E, Spradlin P, Stagni F, Stahl M, Stahl S, Stefko P, Steinkamp O, Stemmle S, Stenyakin O, Stepanova M, Stevens H, Stone S, Stracka S, Stramaglia M E, Straticiuc M, Strokov S, Sun J, Sun L, Sun Y, Svihra P, Swientek K, Szabelski A, Szumlak T, Szymanski M, Taneja S, Tang Z, Tekampe T, Tellarini G, Teubert F, Thomas E, Thomson K A, Tilley M J, Tisserand V, T'Jampens S, Tobin M, Tolk S, Tomassetti L, Tonelli D, Torres Machado D, Tou D Y, Tournefier E, Traill M, Tran M T, Trippl C, Trisovic A, Tsaregorodtsev A, Tuci G, Tully A, Tuning N, Ukleja A, Usachov A, Ustyuzhanin A, Uwer U, Vagner A, Vagnoni V, Valassi A, Valenti G, van Beuzekom M, Van Hecke H, van Herwijnen E, Van Hulse C B, van Veghel M, Vazquez Gomez R, Vazquez Regueiro P, Vázquez Sierra C, Vecchi S, Velthuis J J, Veltri M, Venkateswaran A, Vernet M, Veronesi M, Vesterinen M, Viana Barbosa J V, Vieira D, Vieites Diaz M, Viemann H, Vilasis-Cardona X, Vitkovskiy A, Volkov V, Vollhardt A, Vom Bruch D, Vorobyev A, Vorobyev V, Voropaev N, Waldi R, Walsh J, Wang J, Wang J, Wang J, Wang M, Wang Y, Wang Z, Ward D R, Wark H M, Watson N K, Websdale D, Weiden A, Weisser C, Westhenry B D C, White D J, Whitehead M, Wiedner D, Wilkinson G, Wilkinson M, Williams I, Williams M, Williams M R J, Williams T, Wilson F F, Wislicki W, Witek M, Witola L, Wormser G, Wotton S A, Wu H, Wyllie K, Xiang Z, Xiao D, Xie Y, Xing H, Xu A, Xu L, Xu M, Xu Q, Xu Z, Xu Z, Yang Z, Yang Z, Yao Y, Yeomans L E, Yin H, Yu J, Yuan X, Yushchenko O, Zarebski K A, Zavertyaev M, Zdybal M, Zeng M, Zhang D, Zhang L, Zhang S, Zhang W C, Zhang Y, Zhelezov A, Zheng Y, Zhou X, Zhou Y, Zhu X, Zhukov V, Zonneveld J B, Zucchelli S
机构信息
Nikhef National Institute for Subatomic Physics, Amsterdam, Netherlands.
Physik-Institut, Universität Zürich, Zürich, Switzerland.
出版信息
Phys Rev Lett. 2020 Feb 28;124(8):082002. doi: 10.1103/PhysRevLett.124.082002.
We report four narrow peaks in the Ξ_{b}^{0}K^{-} mass spectrum obtained using pp collisions at center-of-mass energies of 7, 8, and 13 TeV, corresponding to a total integrated luminosity of 9 fb^{-1} recorded by the LHCb experiment. Referring to these states by their mass, the mass values are m[Ω_{b}(6316)^{-}]=6315.64±0.31±0.07±0.50 MeV, m[Ω_{b}(6330)^{-}]=6330.30±0.28±0.07±0.50 MeV, m[Ω_{b}(6340)^{-}]=6339.71±0.26±0.05±0.50 MeV, m[Ω_{b}(6350)^{-}]=6349.88±0.35±0.05±0.50 MeV, where the uncertainties are statistical, systematic, and the last is due to the knowledge of the Ξ_{b}^{0} mass. The natural widths of the three lower mass states are consistent with zero, and the 90% confidence-level upper limits are determined to be Γ[Ω_{b}(6316)^{-}]<2.8 MeV, Γ[Ω_{b}(6330)^{-}]<3.1 MeV and Γ[Ω_{b}(6340)^{-}]<1.5 MeV. The natural width of the Ω_{b}(6350)^{-} peak is 1.4_{-0.8}^{+1.0}±0.1 MeV, which is 2.5σ from zero and corresponds to an upper limit of 2.8 MeV. The peaks have local significances ranging from 3.6σ to 7.2σ. After accounting for the look-elsewhere effect, the significances of the Ω_{b}(6316)^{-} and Ω_{b}(6330)^{-} peaks are reduced to 2.1σ and 2.6σ, respectively, while the two higher mass peaks exceed 5σ. The observed peaks are consistent with expectations for excited Ω_{b}^{-} resonances.
我们报告了在大型强子对撞机底夸克实验（LHCb experiment）中，使用质心能量分别为7、8和13 TeV的质子-质子碰撞所获得的Ξ_{b}^{0}K^{-} 质量谱中的四个窄峰，对应的总积分亮度为9 fb^{-1}。根据这些态的质量来指代它们，质量值分别为m[Ω_{b}(6316)^{-}]=6315.64±0.31±0.07±0.50 MeV，m[Ω_{b}(6330)^{-}]=6330.30±0.28±0.07±0.50 MeV，m[Ω_{b}(6340)^{-}]=6339.71±0.26±0.05±0.50 MeV，m[Ω_{b}(6350)^{-}]=6349.88±0.35±0.05±0.50 MeV，其中不确定性分别为统计不确定性、系统不确定性，最后一项是由于对Ξ_{b}^{0} 质量的了解所导致的不确定性。三个较低质量态的自然宽度与零一致，90%置信水平的上限确定为Γ[Ω_{b}(6316)^{-}]<2.8 MeV，Γ[Ω_{b}(6330)^{-}]<3.1 MeV，Γ[Ω_{b}(6340)^{-}]<1.5 MeV。Ω_{b}(6350)^{-} 峰的自然宽度为1.4_{-0.8}^{+1.0}±0.1 MeV，与零相差2.5σ，对应的上限为2.8 MeV。这些峰的局部显著性范围为3.6σ至7.2σ。在考虑了“看别处效应”之后，Ω_{b}(6316)^{-} 和Ω_{b}(6330)^{-} 峰的显著性分别降至2.1σ和2.6σ，而两个较高质量的峰超过了5σ。观测到的峰与激发态Ω_{b}^{-} 共振的预期一致。
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