利用\(B^{0}→K_{S}^{0}ℓ^{+}ℓ^{-}\)和\(B^{+}→K^{*+}ℓ^{+}ℓ^{-}\)衰变对轻子普适性的检验

Aaij R, Abdelmotteleb A S W, Abellán Beteta C, Abudinén F, Ackernley T, Adeva B, Adinolfi M, Afsharnia H, Agapopoulou C, Aidala C A, Aiola S, Ajaltouni Z, Akar S, Albrecht J, Alessio F, Alexander M, Alfonso Albero A, Aliouche Z, Alkhazov G, Alvarez Cartelle P, Amato S, Amey J L, Amhis Y, An L, Anderlini L, Andersson N, Andreianov A, Andreotti M, Archilli F, Artamonov A, Artuso M, Arzymatov K, Aslanides E, Atzeni M, Audurier B, Bachmann S, Bachmayer M, Back J J, Baladron Rodriguez P, Balagura V, Baldini W, Baptista Leite J, Barbetti M, Barlow R J, Barsuk S, Barter W, Bartolini M, Baryshnikov F, Basels J M, Bashir S, Bassi G, Batsukh B, Battig A, Bay A, Beck A, Becker M, Bedeschi F, Bediaga I, Beiter A, Belavin V, Belin S, Bellee V, Belous K, Belov I, Belyaev I, Bencivenni G, Ben-Haim E, Berezhnoy A, Bernet R, Berninghoff D, Bernstein H C, Bertella C, Bertolin A, Betancourt C, Betti F, Bezshyiko Ia, Bhasin S, Bhom J, Bian L, Bieker M S, Biesuz N V, Bifani S, Billoir P, Biolchini A, Birch M, Bishop F C R, Bitadze A, Bizzeti A, Bjørn M, Blago M P, Blake T, Blanc F, Blusk S, Bobulska D, Boelhauve J A, Boente Garcia O, Boettcher T, Boldyrev A, Bondar A, Bondar N, Borghi S, Borisyak M, Borsato M, Borsuk J T, Bouchiba S A, Bowcock T J V, Boyer A, Bozzi C, Bradley M J, Braun S, Brea Rodriguez A, Brodzicka J, Brossa Gonzalo A, Brundu D, Buonaura A, Buonincontri L, Burke A T, Burr C, Bursche A, Butkevich A, Butter J S, Buytaert J, Byczynski W, Cadeddu S, Cai H, Calabrese R, Calefice L, Cali S, Calladine R, Calvi M, Calvo Gomez M, Camargo Magalhaes P, Campana P, Campoverde Quezada A F, Capelli S, Capriotti L, Carbone A, Carboni G, Cardinale R, Cardini A, Carli I, Carniti P, Carus L, Carvalho Akiba K, Casais Vidal A, Caspary R, Casse G, Cattaneo M, Cavallero G, Celani S, Cerasoli J, Cervenkov D, Chadwick A J, Chapman M G, Charles M, Charpentier Ph, Chatzikonstantinidis G, Chavez Barajas C A, Chefdeville M, Chen C, Chen S, Chernov A, Chobanova V, Cholak S, Chrzaszcz M, Chubykin A, Chulikov V, Ciambrone P, Cicala M F, Cid Vidal X, Ciezarek G, 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, Congedo L, Contu A, Cooke N, Coombs G, Corredoira I, Corti G, Costa Sobral C M, Couturier B, Craik D C, Crkovská J, Cruz Torres M, Currie R, Da Silva C L, Dadabaev S, Dai L, Dall'Occo E, Dalseno J, D'Ambrosio C, Danilina A, d'Argent P, Dashkina A, Davies J E, Davis A, De Aguiar Francisco O, De Bruyn K, De Capua S, De Cian M, De Lucia E, De Miranda J M, De Paula L, De Serio M, De Simone D, De Simone P, De Vellis F, de Vries J A, Dean C T, Debernardis F, Decamp D, Dedu V, Del Buono L, Delaney B, Dembinski H-P, Dendek A, Denysenko V, Derkach D, Deschamps O, Desse F, Dettori F, Dey B, Di Cicco A, Di Nezza P, Didenko S, Dieste Maronas L, Dijkstra H, Dobishuk V, Dong C, Donohoe A M, Dordei F, Dos Reis A C, Douglas L, Dovbnya A, Downes A G, Dudek M W, Dufour L, Duk V, Durante P, Durham J M, Dutta D, Dziurda A, Dzyuba A, Easo S, Egede U, Egorychev V, Eidelman S, Eisenhardt S, Ek-In S, Eklund L, Ely S, Ene A, Epple E, Escher S, Eschle J, Esen S, Evans T, Falcao L N, Fan Y, Fang B, Farry S, Fazzini D, Féo M, Fernandez Prieto A, Fernez A D, 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, Fitzgerald D S, Fitzpatrick C, Fiutowski T, Fkiaras A, Fleuret F, Fontana M, Fontanelli F, Forty R, Foulds-Holt D, Franco Lima V, Franco Sevilla M, Frank M, Franzoso E, Frau G, Frei C, Friday D A, Fu J, Fuehring Q, Gabriel E, Galati G, Gallas Torreira A, Galli D, Gambetta S, Gan Y, Gandelman M, Gandini P, Gao Y, Garau M, Garcia Martin L M, Garcia Moreno P, García Pardiñas J, Garcia Plana B, Garcia Rosales F A, Garrido L, Gaspar C, Geertsema R E, Gerick D, Gerken L L, Gersabeck E, Gersabeck M, Gershon T, Gerstel D, Giambastiani L, Gibson V, Giemza H K, Gilman A L, Giovannetti M, Gioventù A, Gironella Gironell P, Giugliano C, Gizdov K, Gkougkousis E L, Gligorov V V, Göbel C, Golobardes E, Golubkov D, Golutvin A, Gomes A, Gomez Fernandez S, Goncalves Abrantes F, Goncerz M, Gong G, Gorbounov P, Gorelov I V, Gotti C, Govorkova E, Grabowski J P, Grammatico T, Granado Cardoso L A, Graugés E, Graverini E, Graziani G, Grecu A, Greeven L M, Grieser N A, Grillo L, Gromov S, Gruberg Cazon B R, Gu C, Guarise M, Guittiere M, Günther P A, Gushchin E, Guth A, Guz Y, Gys T, Hadavizadeh T, Haefeli G, Haen C, Haimberger J, Halewood-Leagas T, Hamilton P M, Hammerich J P, Han Q, Han X, Hancock T H, Hansen E B, Hansmann-Menzemer S, Harnew N, Harrison T, Hasse C, Hatch M, He J, Hecker M, Heijhoff K, Heinicke K, Henderson R D L, Hennequin A M, Hennessy K, Henry L, Heuel J, Hicheur A, Hill D, Hilton M, Hollitt S E, Hou R, Hou Y, Hu J, Hu J, Hu W, Hu X, Huang W, Huang X, Hulsbergen W, Hunter R J, Hushchyn M, Hutchcroft D, Hynds D, Ibis P, Idzik M, Ilin D, Ilten P, Inglessi A, Ishteev A, Ivshin K, Jacobsson R, Jage H, Jakobsen S, Jans E, Jashal B K, Jawahery A, Jevtic V, Jiang X, John M, Johnson D, Jones C R, Jones T P, Jost B, Jurik N, Kalavan Kadavath S H, Kandybei S, Kang Y, Karacson M, Karpov M, Kautz J W, Keizer F, Keller D M, Kenzie M, Ketel T, Khanji B, Kharisova A, Kholodenko S, Kirn T, Kirsebom V S, Kitouni O, Klaver S, Kleijne N, Klimaszewski K, Kmiec M R, Koliiev S, Kondybayeva A, Konoplyannikov A, Kopciewicz P, Kopecna R, Koppenburg P, Korolev M, Kostiuk I, Kot O, Kotriakhova S, Kravchenko P, Kravchuk L, Krawczyk R D, Kreps M, Kress F, Kretzschmar S, Krokovny P, Krupa W, Krzemien W, Kubat J, Kucharczyk M, Kudryavtsev V, Kuindersma H S, Kunde G J, Kvaratskheliya T, Lacarrere D, Lafferty G, Lai A, Lampis A, Lancierini D, Lane J J, Lane R, Lanfranchi G, Langenbruch C, Langer J, Lantwin O, Latham T, Lazzari F, Le Gac R, Lee S H, Lefèvre R, Leflat A, Legotin S, Leroy O, Lesiak T, Leverington B, Li H, Li P, Li S, Li Y, Li Y, Li Z, Liang X, Lin T, Lindner R, Lisovskyi V, Litvinov R, Liu G, Liu H, Liu Q, Liu S, Lobo Salvia A, Loi A, Lomba Castro J, Longstaff I, Lopes J H, López Soliño S, Lovell G H, Lu Y, Lucarelli C, Lucchesi D, Luchuk S, Lucio Martinez M, Lukashenko V, Luo Y, Lupato A, Luppi E, Lupton O, Lusiani A, Lyu X, Ma L, Ma R, Maccolini S, Machefert F, Maciuc F, Macko V, Mackowiak P, Maddrell-Mander S, Madejczyk O, Madhan Mohan L R, Maev O, Maevskiy A, Majewski M W, Malczewski J J, Malde S, Malecki B, Malinin A, Maltsev T, Malygina H, Manca G, Mancinelli G, Manuzzi D, Marangotto D, Maratas J, Marchand J F, Marconi U, Mariani S, Marin Benito C, Marinangeli M, Marks J, Marshall A M, Marshall P J, Martelli G, Martellotti G, Martinazzoli L, Martinelli M, Martinez Santos D, Martinez Vidal F, Massafferri A, Materok M, Matev R, Mathad A, Matiunin V, Matteuzzi C, Mattioli K R, Mauri A, Maurice E, Mauricio J, Mazurek M, McCann M, Mcconnell L, Mcgrath T H, Mchugh N T, McNab A, McNulty R, Mead J V, Meadows B, Meier G, Melnychuk D, Meloni S, Merk M, Merli A, Meyer Garcia L, Mikhasenko M, Milanes D A, Millard E, Milovanovic M, Minard M-N, Minotti A, Minzoni L, Mitchell S E, Mitreska B, Mitzel D S, Mödden A, Mohammed R A, Moise R D, Mokhnenko S, 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, Mulder M, Müller D, Müller K, Murphy C H, Murray D, Murta R, Muzzetto P, Naik P, Nakada T, Nandakumar R, Nanut T, Nasteva I, Needham M, Neri N, Neubert S, Neufeld N, Newcombe R, Niel E M, Nieswand S, Nikitin N, Nolte N S, Normand C, Nunez C, Oblakowska-Mucha A, Obraztsov V, Oeser T, O'Hanlon D P, Okamura S, Oldeman R, Oliva F, Olivares M E, Onderwater C J G, O'Neil R H, Otalora Goicochea J M, Ovsiannikova T, Owen P, Oyanguren A, Padeken K O, Pagare B, Pais P R, Pajero T, Palano A, Palutan M, Pan Y, Panshin G, Papanestis A, Pappagallo M, Pappalardo L L, Pappenheimer C, Parker W, Parkes C, Passalacqua B, Passaleva G, Pastore A, Patel M, Patrignani C, Pawley C J, Pearce A, Pellegrino A, Pepe Altarelli M, Perazzini S, Pereima D, Pereiro Castro A, Perret P, Petric M, Petridis K, Petrolini A, Petrov A, Petrucci S, Petruzzo M, Pham T T H, Philippov A, Piandani R, Pica L, Piccini M, Pietrzyk B, Pietrzyk G, Pili M, Pinci D, Pisani F, Pizzichemi M, P K Resmi, Placinta V, Plews J, Plo Casasus M, Polci F, Poli Lener M, Poliakova M, Poluektov A, Polukhina N, Polyakov I, Polycarpo E, Ponce S, Popov D, Popov S, Poslavskii S, Prasanth K, Promberger L, Prouve C, Pugatch V, Puill V, Punzi G, Qi H, Qian W, Qin N, Quagliani R, 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, Ribatti R, Ricci A M, Ricciardi S, Rinnert K, Robbe P, Robertson G, Rodrigues A B, Rodrigues E, Rodriguez Lopez J A, Rodriguez Rodriguez E R R, Rollings A, Roloff P, Romanovskiy V, Romero Lamas M, Romero Vidal A, Roth J D, Rotondo M, Rudolph M S, Ruf T, Ruiz Fernandez R A, Ruiz Vidal J, Ryzhikov A, Ryzka J, Saborido Silva J J, Sagidova N, Sahoo N, Saitta B, Salomoni M, Sanchez Gras C, Santacesaria R, Santamarina Rios C, Santimaria M, Santovetti E, Saranin D, Sarpis G, Sarpis M, Sarti A, Satriano C, Satta A, Saur M, Savrina D, Sazak H, Scantlebury Smead L G, Scarabotto A, Schael S, Scherl S, Schiller M, Schindler H, Schmelling M, Schmidt B, Schmitt S, Schneider O, Schopper A, Schubiger M, Schulte S, Schune M H, Schwemmer R, Sciascia B, Sellam S, Semennikov A, Senghi Soares M, Sergi A, Serra N, Sestini L, Seuthe A, Shang Y, Shangase D M, Shapkin M, Shchemerov I, Shchutska L, Shears T, Shekhtman L, Shen Z, Sheng S, Shevchenko V, Shields E B, Shimizu Y, Shmanin E, Shupperd J D, Siddi B G, Silva Coutinho R, Simi G, Simone S, Skidmore N, Skwarnicki T, Slater M W, Slazyk I, Smallwood J C, Smeaton J G, Smetkina A, Smith E, Smith M, Snoch A, Soares Lavra L, Sokoloff M D, Soler F J P, Solovev A, Solovyev I, Souza De Almeida F L, Souza De Paula B, Spaan B, Spadaro Norella E, Spradlin P, Stagni F, Stahl M, Stahl S, Stanislaus S, Steinkamp O, Stenyakin O, Stevens H, Stone S, Strekalina D, Suljik F, Sun J, Sun L, Sun Y, Svihra P, Swallow P N, Swientek K, Szabelski A, Szumlak T, Szymanski M, Taneja S, Tanner A R, Tat M D, Terentev A, Teubert F, Thomas E, Thompson D J D, Thomson K A, Tilquin H, Tisserand V, T'Jampens S, Tobin M, Tomassetti L, Tong X, Torres Machado D, Tou D Y, Trifonova E, Trilov S M, Trippl C, Tuci G, Tully A, Tuning N, Ukleja A, Unverzagt D J, Ursov E, Usachov A, Ustyuzhanin A, Uwer U, Vagner A, Vagnoni V, Valassi A, Valenti G, Valls Canudas N, van Beuzekom M, Van Dijk M, Van Hecke H, van Herwijnen E, van Veghel M, Vazquez Gomez R, Vazquez Regueiro P, Vázquez Sierra C, Vecchi S, Velthuis J J, Veltri M, Venkateswaran A, Veronesi M, Vesterinen M, Vieira D, Vieites Diaz M, Viemann H, Vilasis-Cardona X, Vilella Figueras E, Villa A, Vincent P, Volle F C, Vom Bruch D, Vorobyev A, Vorobyev V, Voropaev N, Vos K, Waldi R, Walsh J, Wang C, Wang J, Wang J, Wang J, Wang J, Wang M, Wang R, Wang Y, Wang Z, Wang Z, Wang Z, Ward J A, Watson N K, Weber S G, Websdale D, Weisser C, Westhenry B D C, White D J, Whitehead M, Wiederhold A R, Wiedner D, Wilkinson G, Wilkinson M, Williams I, Williams M, Williams M R J, Wilson F F, Wislicki W, Witek M, Witola L, Wormser G, Wotton S A, Wu H, Wyllie K, Xiang Z, Xiao D, Xie Y, Xu A, Xu J, Xu L, Xu M, Xu Q, Xu Z, Xu Z, Yang D, Yang S, Yang Y, Yang Z, Yang Z, Yao Y, Yeomans L E, Yin H, Yu J, Yuan X, Yushchenko O, Zaffaroni E, Zavertyaev M, Zdybal M, Zenaiev O, Zeng M, Zhang D, Zhang L, Zhang S, Zhang S, Zhang Y, Zhang Y, Zharkova A, Zhelezov A, Zheng Y, Zhou T, Zhou X, Zhou Y, Zhovkovska V, Zhu X, Zhu X, Zhu Z, Zhukov V, Zonneveld J B, Zou Q, Zucchelli S, Zuliani D, Zunica G

Nikhef National Institute for Subatomic Physics, Amsterdam, Netherlands.

Department of Physics, University of Warwick, Coventry, United Kingdom.

Phys Rev Lett. 2022 May 13;128(19):191802. doi: 10.1103/PhysRevLett.128.191802.

Tests of lepton universality in B^{0}→K_{S}^{0}ℓ^{+}ℓ^{-} and B^{+}→K^{+}ℓ^{+}ℓ^{-} decays where ℓ is either an electron or a muon are presented. The differential branching fractions of B^{0}→K_{S}^{0}e^{+}e^{-} and B^{+}→K^{+}e^{+}e^{-} decays are measured in intervals of the dilepton invariant mass squared. The measurements are performed using proton-proton collision data recorded by the LHCb experiment, corresponding to an integrated luminosity of 9 fb^{-1} . The results are consistent with the standard model and previous tests of lepton universality in related decay modes. The first observation of B^{0}→K_{S}^{0}e^{+}e^{-} and B^{+}→K^{*+}e^{+}e^{-} decays is reported.

展示了在(B^{0}→K_{S}^{0}ℓ^{+}ℓ^{-})和(B^{+}→K^{+}ℓ^{+}ℓ^{-})衰变中轻子普适性的测试，其中(ℓ)为电子或缪子。在双轻子不变质量平方的区间内测量了(B^{0}→K_{S}^{0}e^{+}e^{-})和(B^{+}→K^{+}e^{+}e^{-})衰变的微分分支比。测量使用了大型强子对撞机底夸克实验（LHCb实验）记录的质子-质子碰撞数据，对应积分亮度为(9)飞靶(^{-1})。结果与标准模型以及之前在相关衰变模式中的轻子普适性测试一致。报告了(B^{0}→K_{S}^{0}e^{+}e^{-})和(B^{+}→K^{*+}e^{+}e^{-})衰变的首次观测结果。