双粲重子Ξ_{cc}^{++}的观测
Observation of the Doubly Charmed Baryon Ξ_{cc}^{++}.
作者信息
Aaij R, Adeva B, Adinolfi M, Ajaltouni Z, Akar S, Albrecht J, Alessio F, Alexander M, Alfonso Albero A, Ali S, Alkhazov G, Alvarez Cartelle P, Alves A A, Amato S, Amerio S, Amhis Y, An L, Anderlini L, Andreassi G, Andreotti M, Andrews J E, Appleby R B, Archilli F, d'Argent P, Arnau Romeu J, Artamonov A, Artuso M, Aslanides E, Auriemma G, Baalouch M, Babuschkin I, Bachmann S, Back J J, Badalov A, Baesso C, Baker S, Balagura V, Baldini W, Baranov A, Barlow R J, Barschel C, Barsuk S, Barter W, Baryshnikov F, Batozskaya V, Battista V, Bay A, Beaucourt L, Beddow J, Bedeschi F, Bediaga I, Beiter A, Bel L J, Beliy N, Bellee V, Belloli N, Belous K, Belyaev I, Ben-Haim E, Bencivenni G, Benson S, Beranek S, Berezhnoy A, Bernet R, Berninghoff D, Bertholet E, Bertolin A, Betancourt C, Betti F, Bettler M-O, van Beuzekom M, Bezshyiko Ia, Bifani S, Billoir P, Birnkraut A, Bitadze A, Bizzeti A, Bjoern M B, Blake T, Blanc F, Blouw J, Blusk S, Bocci V, Boettcher T, Bondar A, Bondar N, Bonivento W, Bordyuzhin I, Borgheresi A, Borghi S, Borisyak M, Borsato M, Borysova M, Bossu F, Boubdir M, Bowcock T J V, Bowen E, Bozzi C, Braun S, Britton T, Brodzicka J, Brundu D, Buchanan E, Burr C, Bursche A, Buytaert J, Byczynski W, Cadeddu S, Cai H, Calabrese R, Calladine R, Calvi M, Calvo Gomez M, Camboni A, Campana P, Campora Perez D H, Capriotti L, Carbone A, Carboni G, Cardinale R, Cardini A, Carniti P, Carson L, Carvalho Akiba K, Casse G, Cassina L, Castillo Garcia L, Cattaneo M, Cavallero G, Cenci R, Chamont D, Charles M, Charpentier Ph, Chatzikonstantinidis G, Chefdeville M, Chen S, Cheung S F, Chitic S-G, Chobanova V, Chrzaszcz M, Chubykin A, Ciambrone P, Cid Vidal X, Ciezarek G, Clarke P E L, Clemencic M, Cliff H V, Closier J, Cogan J, Cogneras E, Cogoni V, Cojocariu L, Collins P, Colombo T, Comerma-Montells A, Contu A, Cook A, Coombs G, Coquereau S, Corti G, Corvo M, Costa Sobral C M, Couturier B, Cowan G A, Craik D C, Crocombe A, Cruz Torres M, Currie R, D'Ambrosio C, Da Cunha Marinho F, Dall'Occo E, Dalseno J, Davis A, De Aguiar Francisco O, De Capua S, De Cian M, De Miranda J M, De Paula L, De Serio M, De Simone P, Dean C T, Decamp D, Del Buono L, Dembinski H-P, Demmer M, Dendek A, Derkach D, Deschamps O, Dettori F, Dey B, Di Canto A, Di Nezza P, Dijkstra H, Dordei F, Dorigo M, Dosil Suárez A, Douglas L, Dovbnya A, Dreimanis K, Dufour L, Dujany G, Durante P, Dzhelyadin R, Dziewiecki M, Dziurda A, Dzyuba A, Easo S, Ebert M, Egede U, Egorychev V, Eidelman S, Eisenhardt S, Eitschberger U, Ekelhof R, Eklund L, Ely S, Esen S, Evans H M, Evans T, Falabella A, Farley N, Farry S, Fay R, Fazzini D, Federici L, Ferguson D, Fernandez G, Fernandez Declara P, Fernandez Prieto A, Ferrari F, Ferreira Rodrigues F, Ferro-Luzzi M, Filippov S, Fini R A, Fiore M, Fiorini M, Firlej M, Fitzpatrick C, Fiutowski T, Fleuret F, Fohl K, Fontana M, Fontanelli F, Forshaw D C, Forty R, Franco Lima V, Frank M, Frei C, Fu J, Funk W, Furfaro E, Färber C, Gabriel E, Gallas Torreira A, Galli D, Gallorini S, Gambetta S, Gandelman M, Gandini P, Gao Y, Garcia Martin L M, García Pardiñas J, Garra Tico J, Garrido L, Garsed P J, Gascon D, Gaspar C, Gavardi L, Gazzoni G, Gerick D, Gersabeck E, Gersabeck M, Gershon T, Ghez Ph, Gianì S, Gibson V, Girard O G, Giubega L, Gizdov K, Gligorov V V, Golubkov D, Golutvin A, Gomes A, Gorelov I V, Gotti C, Govorkova E, Grabowski J P, Graciani Diaz R, Granado Cardoso L A, Graugés E, Graverini E, Graziani G, Grecu A, Greim R, Griffith P, Grillo L, Gruber L, Gruberg Cazon B R, Grünberg O, Gushchin E, Guz Yu, Gys T, Göbel C, Hadavizadeh T, Hadjivasiliou C, Haefeli G, Haen C, Haines S C, Hamilton B, Han X, Hancock T, Hansmann-Menzemer S, Harnew N, Harnew S T, Harrison J, Hasse C, Hatch M, He J, Hecker M, Heinicke K, Heister A, Hennessy K, Henrard P, Henry L, van Herwijnen E, Heß M, Hicheur A, Hill D, Hombach C, Hopchev P H, Huard Z-C, Hulsbergen W, Humair T, Hushchyn M, Hutchcroft D, Ibis P, Idzik M, Ilten P, Jacobsson R, Jalocha J, Jans E, Jawahery A, Jiang F, John M, Johnson D, Jones C R, Joram C, Jost B, Jurik N, Kandybei S, Karacson M, Kariuki J M, Karodia S, Kazeev N, Kecke M, Kelsey M, Kenzie M, Ketel T, Khairullin E, Khanji B, Khurewathanakul C, Kirn T, Klaver S, Klimaszewski K, Klimkovich T, Koliiev S, Kolpin M, Komarov I, Kopecna R, Koppenburg P, Kosmyntseva A, Kotriakhova S, Kozeiha M, Kreps M, Krokovny P, Kruse F, Krzemien W, Kucewicz W, Kucharczyk M, Kudryavtsev V, Kuonen A K, Kurek K, Kvaratskheliya T, Lacarrere D, Lafferty G, Lai A, Lanfranchi G, Langenbruch C, Latham T, Lazzeroni C, Le Gac R, van Leerdam J, Leflat A, Lefrançois J, Lefèvre R, Lemaitre F, Lemos Cid E, Leroy O, Lesiak T, Leverington B, Li P-R, Li T, Li Y, Li Z, Likhomanenko T, Lindner R, Lionetto F, Lisovskyi V, Liu X, Loh D, Loi A, Longstaff I, Lopes J H, Lucchesi D, Lucio Martinez M, Luo H, Lupato A, Luppi E, Lupton O, Lusiani A, Lyu X, Machefert F, Maciuc F, Macko V, Mackowiak P, Maddock B, Maddrell-Mander S, Maev O, Maguire K, Maisuzenko D, Majewski M W, Malde S, Malinin A, Maltsev T, Manca G, Mancinelli G, Manning P, Marangotto D, Maratas J, Marchand J F, Marconi U, Marin Benito C, Marinangeli M, Marino P, Marks J, Martellotti G, Martin M, Martinelli M, Martinez Santos D, Martinez Vidal F, Martins Tostes D, Massacrier L M, Massafferri A, Matev R, Mathad A, Mathe Z, Matteuzzi C, Mauri A, Maurice E, Maurin B, Mazurov A, McCann M, McNab A, McNulty R, Mead J V, Meadows B, Meaux C, Meier F, Meinert N, Melnychuk D, Merk M, Merli A, Michielin E, Milanes D A, Millard E, Minard M-N, Minzoni L, Mitzel D S, Mogini A, Molina Rodriguez J, Mombacher T, Monroy I A, Monteil S, Morandin M, Morello M J, Morgunova O, Moron J, Morris A B, Mountain R, Muheim F, Mulder M, Müller D, Müller J, Müller K, Müller V, Naik P, Nakada T, Nandakumar R, Nandi A, Nasteva I, Needham M, Neri N, Neubert S, Neufeld N, Neuner M, Nguyen T D, Nguyen-Mau C, Nieswand S, Niet R, Nikitin N, Nikodem T, Nogay A, O'Hanlon D P, Oblakowska-Mucha A, Obraztsov V, Ogilvy S, Oldeman R, Onderwater C J G, Ossowska A, Otalora Goicochea J M, Owen P, Oyanguren A, Pais P R, Palano A, Palutan M, 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, Penso G, Pepe Altarelli M, Perazzini S, Perret P, Pescatore L, Petridis K, Petrolini A, Petrov A, Petruzzo M, Picatoste Olloqui E, Pietrzyk B, Pikies M, Pinci D, Pistone A, Piucci A, Placinta V, Playfer S, Plo Casasus M, Polci F, Poli Lener M, Poluektov A, Polyakov I, Polycarpo E, Pomery G J, Ponce S, Popov A, Popov D, Poslavskii S, Potterat C, Price E, Prisciandaro J, Prouve C, Pugatch V, Puig Navarro A, Pullen H, Punzi G, Qian W, Quagliani R, Quintana B, Rachwal B, Rademacker J H, Rama M, Ramos Pernas M, Rangel M S, Raniuk I, Ratnikov F, Raven G, Ravonel Salzgeber M, Reboud M, Redi F, Reichert S, Dos Reis A C, Remon Alepuz C, Renaudin V, Ricciardi S, Richards S, Rihl M, Rinnert K, Rives Molina V, Robbe P, Robert A, Rodrigues A B, Rodrigues E, Rodriguez Lopez J A, Rodriguez Perez P, Rogozhnikov A, Roiser S, Rollings A, Romanovskiy V, Romero Vidal A, Ronayne J W, Rotondo M, Rudolph M S, Ruf T, Ruiz Valls P, Ruiz Vidal J, Saborido Silva J J, Sadykhov E, Sagidova N, Saitta B, Salustino Guimaraes V, Sanchez Gonzalo D, Sanchez Mayordomo C, Sanmartin Sedes B, Santacesaria R, Santamarina Rios C, Santimaria M, Santovetti E, Sarpis G, Sarti A, Satriano C, Satta A, Saunders D M, Savrina D, Schael S, Schellenberg M, Schiller M, Schindler H, Schlupp M, Schmelling M, Schmelzer T, Schmidt B, Schneider O, Schopper A, Schreiner H F, Schubert K, Schubiger M, Schune M-H, Schwemmer R, Sciascia B, Sciubba A, Semennikov A, Sergi A, Serra N, Serrano J, Sestini L, Seyfert P, Shapkin M, Shapoval I, Shcheglov Y, Shears T, Shekhtman L, Shevchenko V, Siddi B G, Silva Coutinho R, Silva de Oliveira L, Simi G, Simone S, Sirendi M, Skidmore N, Skwarnicki T, Smith E, Smith I T, Smith J, Smith M, Soares Lavra L, Sokoloff M D, Soler F J P, Souza De Paula B, Spaan B, Spradlin P, Sridharan S, Stagni F, Stahl M, Stahl S, Stefko P, Stefkova S, Steinkamp O, Stemmle S, Stenyakin O, Stepanova M, Stevens H, Stone S, Storaci B, Stracka S, Stramaglia M E, Straticiuc M, Straumann U, Sun L, Sutcliffe W, Swientek K, Syropoulos V, Szczekowski M, Szumlak T, Szymanski M, T'Jampens S, Tayduganov A, Tekampe T, Tellarini G, Teubert F, Thomas E, van Tilburg J, Tilley M J, Tisserand V, Tobin M, Tolk S, Tomassetti L, Tonelli D, Toriello F, Tourinho Jadallah Aoude R, Tournefier E, Traill M, Tran M T, Tresch M, Trisovic A, Tsaregorodtsev A, Tsopelas P, Tully A, Tuning N, Ukleja A, Usachov A, Ustyuzhanin A, Uwer U, Vacca C, Vagner A, Vagnoni V, Valassi A, Valat S, Valenti G, Vazquez Gomez R, Vazquez Regueiro P, Vecchi S, van Veghel M, Velthuis J J, Veltri M, Veneziano G, Venkateswaran A, Verlage T A, Vernet M, Vesterinen M, Viana Barbosa J V, Viaud B, Vieira D, Vieites Diaz M, Viemann H, Vilasis-Cardona X, Vitti M, Volkov V, Vollhardt A, Voneki B, Vorobyev A, Vorobyev V, Voß C, de Vries J A, Vázquez Sierra C, Waldi R, Wallace C, Wallace R, Walsh J, Wang J, Ward D R, Wark H M, Watson N K, Websdale D, Weiden A, Whitehead M, Wicht J, Wilkinson G, Wilkinson M, Williams M, Williams M P, Williams M, Williams T, Wilson F F, Wimberley J, Winn M A, Wishahi J, Wislicki W, Witek M, Wormser G, Wotton S A, Wraight K, Wyllie K, Xie Y, Xu Z, Yang Z, Yang Z, Yao Y, Yin H, Yu J, Yuan X, Yushchenko O, Zarebski K A, Zavertyaev M, Zhang L, Zhang Y, Zhelezov A, Zheng Y, Zhu X, Zhukov V, Zonneveld J B, Zucchelli S
机构信息
European Organization for Nuclear Research (CERN), Geneva, Switzerland.
Universidad de Santiago de Compostela, Santiago de Compostela, Spain.
出版信息
Phys Rev Lett. 2017 Sep 15;119(11):112001. doi: 10.1103/PhysRevLett.119.112001. Epub 2017 Sep 11.
A highly significant structure is observed in the Λ_{c}^{+}K^{-}π^{+}π^{+} mass spectrum, where the Λ_{c}^{+} baryon is reconstructed in the decay mode pK^{-}π^{+}. The structure is consistent with originating from a weakly decaying particle, identified as the doubly charmed baryon Ξ_{cc}^{++}. The difference between the masses of the Ξ_{cc}^{++} and Λ_{c}^{+} states is measured to be 1334.94±0.72(stat.)±0.27(syst.) MeV/c^{2}, and the Ξ_{cc}^{++} mass is then determined to be 3621.40±0.72(stat.)±0.27(syst.)±0.14(Λ_{c}^{+}) MeV/c^{2}, where the last uncertainty is due to the limited knowledge of the Λ_{c}^{+} mass. The state is observed in a sample of proton-proton collision data collected by the LHCb experiment at a center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 1.7 fb^{-1}, and confirmed in an additional sample of data collected at 8 TeV.
在(\Lambda_{c}^{+}K^{-}\pi^{+}\pi^{+})质量谱中观察到一个非常显著的结构，其中(\Lambda_{c}^{+})重子在衰变模式(pK^{-}\pi^{+})中被重建。该结构与源自一个弱衰变粒子的情况相符，该粒子被确定为双粲重子(\Xi_{cc}^{++})。(\Xi_{cc}^{++})和(\Lambda_{c}^{+})态质量之间的差值经测量为(1334.94\pm0.72)（统计）(\pm0.27)（系统）(MeV/c^{2})，然后(\Xi_{cc}^{++})的质量被确定为(3621.40\pm0.72)（统计）(\pm0.27)（系统）(\pm0.14)（(\Lambda_{c}^{+})）(MeV/c^{2})，其中最后一个不确定度是由于对(\Lambda_{c}^{+})质量的认识有限。该态在大型强子对撞机底夸克实验（LHCb实验）收集的质子 - 质子碰撞数据样本中被观测到，质心能量为(13) TeV，对应积分亮度为(1.7) (fb^{-1})，并在另外一个在(8) TeV收集的数据样本中得到证实。
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