First Observation of the Radiative Decay Λ_{b}^{0}→Λγ.

作者信息

Aaij R, Abellán Beteta C, Adeva B, Adinolfi M, Aidala C A, 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, Andrews J E, 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, Batozskaya V, Batsukh B, Battig A, Battista V, Bay A, Bedeschi F, Bediaga I, Beiter A, Bel L J, Belin S, Beliy N, Bellee V, Belloli N, Belous K, Belyaev I, Bencivenni G, Ben-Haim E, Benson S, Beranek S, Berezhnoy A, Bernet R, Berninghoff D, Bertholet E, Bertolin A, Betancourt C, Betti F, Bettler M O, Bezshyiko Ia, Bhasin S, Bhom J, Bieker M S, Bifani S, Billoir P, Birnkraut A, Bizzeti A, Bjørn M, Blago M P, Blake T, Blanc F, Blusk S, Bobulska D, Bocci V, Boente Garcia O, Boettcher T, Bondar A, Bondar N, Borghi S, Borisyak M, Borsato M, Boubdir M, Bowcock T J V, Bozzi C, Braun S, 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, Cali S, 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, Carvalho Akiba K, Casse G, Cattaneo M, Cavallero G, Cenci R, Chapman M G, Charles M, Charpentier Ph, Chatzikonstantinidis G, Chefdeville M, Chekalina V, Chen C, Chen S, Chitic S-G, Chobanova V, Chrzaszcz M, Chubykin A, Ciambrone P, Cid Vidal X, Ciezarek G, Cindolo F, Clarke P E L, Clemencic M, Cliff H V, Closier J, Coco V, Coelho J A B, Cogan J, Cogneras E, Cojocariu L, Collins P, Colombo T, Comerma-Montells A, Contu A, Coombs G, Coquereau S, Corti G, Costa Sobral C M, Couturier B, Cowan G A, Craik D C, 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, Derkach D, Deschamps O, Desse F, Dettori F, Dey B, Di Canto A, Di Nezza P, Didenko S, Dijkstra H, Dordei F, Dorigo M, Dos Reis A C, Dosil Suárez A, Douglas L, Dovbnya A, Dreimanis K, Dufour L, Dujany G, Durante P, Durham J M, Dutta D, Dzhelyadin R, Dziewiecki M, Dziurda A, Dzyuba A, Easo S, Egede U, Egorychev V, Eidelman S, Eisenhardt S, Eitschberger U, Ekelhof R, Eklund L, Ely S, Ene A, Escher S, Esen S, Evans T, Falabella A, Färber C, Farley N, Farry S, Fazzini D, Féo M, Fernandez Declara P, Fernandez Prieto A, Ferrari F, Ferreira Lopes L, Ferreira Rodrigues F, Ferreres Sole S, Ferro-Luzzi M, Filippov S, Fini R A, Fiorini M, Firlej M, Fitzpatrick C, Fiutowski T, Fleuret F, Fontana M, Fontanelli F, Forty R, Franco Lima V, Frank M, Frei C, Fu J, 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, Garra Tico J, Garrido L, Gascon D, Gaspar C, Gazzoni G, Gerick D, Gersabeck E, Gersabeck M, Gershon T, Gerstel D, Ghez Ph, Gibson V, Girard O G, Gironella Gironell P, Giubega L, Gizdov K, Gligorov V V, Göbel C, 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, Gu C, Gushchin E, Guth A, Guz Yu, Gys T, Hadavizadeh T, Hadjivasiliou C, Haefeli G, Haen C, Haines S C, Hamilton B, Han Q, Han X, Hancock T H, Hansmann-Menzemer S, Harnew N, Harrison T, Hasse C, Hatch M, He J, Hecker M, Heinicke K, Heister A, Hennessy K, Henry L, Heß M, Heuel J, Hicheur A, Hidalgo Charman R, Hill D, Hilton M, Hopchev P H, Hu J, Hu W, Huang W, Huard Z C, Hulsbergen W, Humair T, Hushchyn M, Hutchcroft D, Hynds D, Ibis P, Idzik M, Ilten P, Inglessi A, Inyakin A, Ivshin K, Jacobsson R, Jakobsen S, Jalocha J, Jans E, Jashal B K, 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, Keizer F, Kelsey M, Kenzie M, Ketel T, Khanji B, Kharisova A, Khurewathanakul C, Kim K E, Kirn T, Kirsebom V S, Klaver S, Klimaszewski K, Koliiev S, Kolpin M, Kopecna R, Koppenburg P, Kostiuk I, Kot O, Kotriakhova S, Kozeiha M, Kravchuk L, Kreps M, Kress F, Kretzschmar S, Krokovny P, Krupa W, Krzemien W, Kucewicz W, Kucharczyk M, Kudryavtsev V, Kunde G J, Kuonen A K, Kvaratskheliya T, Lacarrere D, Lafferty G, Lai A, Lancierini D, Lanfranchi G, Langenbruch C, Latham T, Lazzeroni C, Le Gac R, Lefèvre R, Leflat A, Lemaitre F, Leroy O, Lesiak T, Leverington B, Li H, Li P-R, Li X, Li Y, Li Z, Liang X, Likhomanenko T, Lindner R, Lionetto F, Lisovskyi V, Liu G, Liu X, Loh D, Loi A, Longstaff I, Lopes J H, Loustau G, Lovell G H, Lucchesi D, Lucio Martinez M, Luo Y, Lupato A, Luppi E, Lupton O, Lusiani A, Lyu X, Machefert F, Maciuc F, Macko V, Mackowiak P, Maddrell-Mander S, Maev O, Maguire K, Maisuzenko D, Majewski M W, Malde S, Malecki B, Malinin A, Maltsev T, Malygina H, Manca G, Mancinelli G, Marangotto D, Maratas J, Marchand J F, Marconi U, Marin Benito C, Marinangeli M, Marino P, Marks J, Marshall P J, Martellotti G, 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, Maurin B, McCann M, McNab A, McNulty R, Mead J V, Meadows B, Meaux C, Meinert N, Melnychuk D, Merk M, Merli A, Michielin E, Milanes D A, Millard E, Minard M-N, Minzoni L, 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, Mountain R, Muheim F, Mukherjee M, Mulder M, Müller D, Müller J, Müller K, Müller V, Murphy C H, Murray D, 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, Nieswand S, Niet R, Nikitin N, Nolte N S, 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, Parker W, Parkes C, Passaleva G, Pastore A, Patel M, Patrignani C, Pearce A, Pellegrino A, Penso G, 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, Pikies M, 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, Price E, Prouve C, Pugatch V, Puig Navarro A, Pullen H, Punzi G, Qian W, Qin J, Quagliani R, Quintana B, Raab N V, Rachwal B, Rademacker J H, Rama M, Ramos Pernas M, Rangel M S, Ratnikov F, Raven G, Ravonel Salzgeber M, Reboud M, Redi F, Reichert S, 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 Vidal A, Roth J D, Rotondo M, Rudolph M S, Ruf T, Ruiz Vidal J, Saborido Silva J J, Sagidova N, Saitta B, Salustino Guimaraes V, Sanchez Gras C, Sanchez Mayordomo C, Sanmartin Sedes B, Santacesaria R, Santamarina Rios C, Santimaria M, Santovetti E, Sarpis G, Sarti A, Satriano C, Satta A, Saur M, Savrina D, 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, Semennikov A, Sepulveda E S, Sergi A, Serra N, Serrano J, Sestini L, Seuthe A, Seyfert P, Shapkin M, Shears T, Shekhtman L, Shevchenko V, Shmanin E, 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, Smith E, Smith I T, Smith M, 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, Stefkova S, Steinkamp O, Stemmle S, Stenyakin O, Stepanova M, Stevens H, Stocchi A, Stone S, Stracka S, Stramaglia M E, Straticiuc M, Straumann U, Strokov S, Sun J, Sun L, Sun Y, Swientek K, Szabelski A, Szumlak T, Szymanski M, Tang Z, Tekampe T, Tellarini G, Teubert F, Thomas E, Tilley M J, Tisserand V, T'Jampens S, Tobin M, Tolk S, Tomassetti L, Tonelli D, Tou D Y, Tourinho Jadallah Aoude R, Tournefier E, Traill M, Tran M T, Trisovic A, Tsaregorodtsev A, Tuci G, Tully A, Tuning N, Ukleja A, Usachov A, Ustyuzhanin A, Uwer U, Vagner A, Vagnoni V, Valassi A, Valat S, Valenti G, van Beuzekom M, Van Hecke H, van Herwijnen E, Van Hulse C B, van Tilburg J, van Veghel M, Vasiliev A, 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, Vitti M, Volkov V, Vollhardt A, Vom Bruch D, Voneki B, Vorobyev A, Vorobyev V, Voropaev N, Waldi R, Walsh J, Wang J, Wang M, Wang Y, Wang Z, Ward D R, Wark H M, Watson N K, Websdale D, Weiden A, Weisser C, Whitehead M, Wilkinson G, Wilkinson M, Williams I, Williams M, Williams M R J, Williams T, Wilson F F, Winn M, Wislicki W, Witek M, Wormser G, Wotton S A, Wyllie K, Xiao D, Xie Y, Xing H, Xu A, 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, Zeng M, Zhang D, Zhang L, Zhang W C, Zhang Y, Zhelezov A, Zheng 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. 2019 Jul 19;123(3):031801. doi: 10.1103/PhysRevLett.123.031801.

The radiative decay Λ_{b}^{0}→Λγ is observed for the first time using a data sample of proton-proton collisions corresponding to an integrated luminosity of 1.7 fb^{-1} collected by the LHCb experiment at a center-of-mass energy of 13 TeV. Its branching fraction is measured exploiting the B^{0}→K^{*0}γ decay as a normalization mode and is found to be B(Λ_{b}^{0}→Λγ)=(7.1±1.5±0.6±0.7)×10^{-6}, where the quoted uncertainties are statistical, systematic, and systematic from external inputs, respectively. This is the first observation of a radiative decay of a beauty baryon.