Measurements of the branching fraction ratio Bϕ→μ+μ−/Bϕ→e+e−\\documentclass[12pt]{minimal} \\usepackage{amsmath} \\usepackage{wasysym} \\usepackage{amsfonts} \\usepackage{amssymb} \\usepackage{amsbsy} \\usepackage{mathrsfs} \\usepackage{upgreek} \\setlength{\\oddsidemargin}{-69pt} \\begin{document}$$ \\mathcal{B}\\left(\\phi \ o {\\mu}^{+}{\\mu}^{-}\\right)/\\mathcal{B}\\left(\\phi \ o {\ extrm{e}}^{+}{\ extrm{e}}^{-}\\right) $$\\end{document} with charm meson decays

The Lhcb Collaboration ,R Aaij,A S W Abdelmotteleb,C Abellan Beteta,F Abudinén,T Ackernley,B Adeva,M Adinolfi,P Adlarson,C Agapopoulou,C A Aidala,Z Ajaltouni,S Akar,K Akiba,P Albicocco,J Albrecht,F Alessio,M Alexander,A Alfonso Albero,Z Aliouche,P Alvarez Cartelle,R Amalric,S Amato,J L Amey,Y Amhis,L An,L Anderlini,M Andersson,A Andreianov,P Andreola,M Andreotti,D Andreou,A Anelli,D Ao,F Archilli,M Argenton,S Arguedas Cuendis,A Artamonov,M Artuso,E Aslanides,M Atzeni,B Audurier,D Bacher,I Bachiller Perea,S Bachmann,M Bachmayer,J J Back,P Baladron Rodriguez,V Balagura,W Baldini,J Baptista De Souza Leite,M Barbetti,I R Barbosa,R J Barlow,S Barsuk,W Barter,M Bartolini,J Bartz,F Baryshnikov,J M Basels,G Bassi,B Batsukh,A Battig,A Bay,A Beck,M Becker,F Bedeschi,I B Bediaga,A Beiter,S Belin,V Bellee,K Belous,I Belov,I Belyaev,G Benane,G Bencivenni,E Ben-Haim,A Berezhnoy,R Bernet,S Bernet Andres,H C Bernstein,C Bertella,A Bertolin,C Betancourt,F Betti,J Bex,Ia Bezshyiko,J Bhom,M S Bieker,N V 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Dudek,L Dufour,V Duk,P Durante,M M Duras,J M Durham,A Dziurda,A Dzyuba,S Easo,E Eckstein,U Egede,A Egorychev,V Egorychev,C Eirea Orro,S Eisenhardt,E Ejopu,S Ek-In,L Eklund,M Elashri,J Ellbracht,S Ely,A Ene,E Epple,S Escher,J Eschle,S Esen,T Evans,F Fabiano,L N Falcao,Y Fan,B Fang,L Fantini,M Faria,K Farmer,D Fazzini,L Felkowski,M Feng,M Feo,M Fernandez Gomez,A D Fernez,F Ferrari,F Ferreira Rodrigues,S Ferreres Sole,M Ferrillo,M Ferro-Luzzi,S Filippov,R A Fini,M Fiorini,M Firlej,K M Fischer,D S Fitzgerald,C Fitzpatrick,T Fiutowski,F Fleuret,M Fontana,F Fontanelli,L F Foreman,R Forty,D Foulds-Holt,M Franco Sevilla,M Frank,E Franzoso,G Frau,C Frei,D A Friday,L Frontini,J Fu,Q Fuehring,Y Fujii,T Fulghesu,E Gabriel,G Galati,M D Galati,A Gallas Torreira,D Galli,S Gambetta,M Gandelman,P Gandini,H Gao,R Gao,Y Gao,Y Gao,Y Gao,M Garau,L M Garcia Martin,P Garcia Moreno,J García Pardiñas,B Garcia Plana,K G Garg,L Garrido,C Gaspar,R E Geertsema,L L Gerken,E Gersabeck,M Gersabeck,T Gershon,Z Ghorbanimoghaddam,L Giambastiani,F I Giasemis,V Gibson,H K Giemza,A L Gilman,M Giovannetti,A Gioventù,P Gironella Gironell,C Giugliano,M A Giza,E L Gkougkousis,F C Glaser,V V Gligorov,C Göbel,E Golobardes,D Golubkov,A Golutvin,A Gomes,S Gomez Fernandez,F Goncalves Abrantes,M Goncerz,G Gong,J A Gooding,I V Gorelov,C Gotti,J P Grabowski,L A Granado Cardoso,E Graugés,E Graverini,L Grazette,G Graziani,A T Grecu,L M Greeven,N A Grieser,L Grillo,S Gromov,C Gu,M Guarise,M Guittiere,V Guliaeva,P A Günther,A.-K Guseinov,E Gushchin,Y Guz,T Gys,T Hadavizadeh,C Hadjivasiliou,G Haefeli,C Haen,J Haimberger,M Hajheidari,T Halewood-Leagas,M M Halvorsen,P M Hamilton,J Hammerich,Q Han,X Han,S Hansmann-Menzemer,L Hao,N Harnew,T Harrison,M Hartmann,C Hasse,J He,K Heijhoff,F Hemmer,C Henderson,R D L Henderson,A M Hennequin,K Hennessy,L Henry,J Herd,P Herrero Gascon,J Heuel,A Hicheur,D Hill,S E Hollitt,J Horswill,R Hou,Y Hou,N Howarth,J Hu,J Hu,W Hu,X Hu,W Huang,W Hulsbergen,R J Hunter,M Hushchyn,D Hutchcroft,M Idzik,D Ilin,P Ilten,A Inglessi,A Iniukhin,A Ishteev,K Ivshin,R Jacobsson,H Jage,S J Jaimes Elles,S Jakobsen,E Jans,B K Jashal,A Jawahery,V Jevtic,E Jiang,X Jiang,Y Jiang,Y J Jiang,M John,D Johnson,C R Jones,T P Jones,S Joshi,B Jost,N Jurik,I Juszczak,D Kaminaris,S Kandybei,Y Kang,M Karacson,D Karpenkov,M Karpov,A M Kauniskangas,J W Kautz,F Keizer,D M Keller,M Kenzie,T Ketel,B Khanji,A Kharisova,S Kholodenko,G Khreich,T Kirn,V S Kirsebom,O Kitouni,S Klaver,N Kleijne,K Klimaszewski,M R Kmiec,S Koliiev,L Kolk,A Konoplyannikov,P Kopciewicz,P Koppenburg,M Korolev,I Kostiuk,O Kot,S Kotriakhova,A Kozachuk,P Kravchenko,L Kravchuk,M Kreps,S Kretzschmar,P Krokovny,W Krupa,W Krzemien,J Kubat,S Kubis,W Kucewicz,M Kucharczyk,V Kudryavtsev,E Kulikova,A Kupsc,B K Kutsenko,D Lacarrere,A Lai,A Lampis,D Lancierini,C Landesa Gomez,J J Lane,R Lane,C Langenbruch,J Langer,O Lantwin,T Latham,F Lazzari,C Lazzeroni,R Le Gac,S H Lee,R Lefèvre,A Leflat,S Legotin,M Lehuraux,O Leroy,T Lesiak,B 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Parkes,B Passalacqua,G Passaleva,D Passaro,A Pastore,M Patel,J Patoc,C Patrignani,C J Pawley,A Pellegrino,M Pepe Altarelli,S Perazzini,D Pereima,A Pereiro Castro,P Perret,A Perro,K Petridis,A Petrolini,S Petrucci,H Pham,L Pica,M Piccini,B Pietrzyk,G Pietrzyk,D Pinci,F Pisani,M Pizzichemi,V Placinta,M Plo Casasus,F Polci,M Poli Lener,A Poluektov,N Polukhina,I Polyakov,E Polycarpo,S Ponce,D Popov,S Poslavskii,K Prasanth,C Prouve,V Pugatch,G Punzi,W Qian,N Qin,S Qu,R Quagliani,R I Rabadan Trejo,B Rachwal,J H Rademacker,M Rama,M Ramírez García,M Ramos Pernas,M S Rangel,F Ratnikov,G Raven,M Rebollo De Miguel,F Redi,J Reich,F Reiss,Z Ren,P K Resmi,R Ribatti,G R Ricart,D Riccardi,S Ricciardi,K Richardson,M Richardson-Slipper,K Rinnert,P Robbe,G Robertson,E Rodrigues,E Rodriguez Fernandez,J A Rodriguez Lopez,E Rodriguez Rodriguez,A Rogovskiy,D L Rolf,A Rollings,P Roloff,V Romanovskiy,M Romero Lamas,A Romero Vidal,G Romolini,F Ronchetti,M Rotondo,S R Roy,M S Rudolph,T Ruf,M Ruiz Diaz,R A Ruiz 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Song,F L Souza De Almeida,B Souza De Paula,E Spadaro Norella,E Spedicato,J G Speer,E Spiridenkov,P Spradlin,V Sriskaran,F Stagni,M Stahl,S Stahl,S Stanislaus,E N Stein,O Steinkamp,O Stenyakin,H Stevens,D Strekalina,Y Su,F Suljik,J Sun,L Sun,Y Sun,P N Swallow,K Swientek,F Swystun,A Szabelski,T Szumlak,M Szymanski,Y Tan,S Taneja,M D Tat,A Terentev,F Terzuoli,F Teubert,E Thomas,D J D Thompson,H Tilquin,V Tisserand,S T’Jampens,M Tobin,L Tomassetti,G Tonani,X Tong,D Torres Machado,L Toscano,D Y Tou,C Trippl,G Tuci,N Tuning,L H Uecker,A Ukleja,D J Unverzagt,E Ursov,A Usachov,A Ustyuzhanin,U Uwer,V Vagnoni,A Valassi,G Valenti,N Valls Canudas,H Van Hecke,E Van Herwijnen,C B Van Hulse,R Van Laak,M Van Veghel,R Vazquez Gomez,P Vazquez Regueiro,C Vázquez Sierra,S Vecchi,J J Velthuis,M Veltri,A Venkateswaran,M Vesterinen,M Vieites Diaz,X Vilasis-Cardona,E Vilella Figueras,A Villa,P Vincent,F C Volle,D Vom Bruch,V Vorobyev,N Voropaev,K Vos,G Vouters,C Vrahas,J Walsh,E J Walton,G Wan,C Wang,G Wang,J Wang,J Wang,J Wang,J Wang,M Wang,N W Wang,R Wang,X Wang,X W Wang,Y Wang,Z Wang,Z Wang,Z Wang,J A Ward,N K Watson,D Websdale,Y Wei,B D C Westhenry,D J White,M Whitehead,A R Wiederhold,D Wiedner,G Wilkinson,M K Wilkinson,M Williams,M R J Williams,R Williams,F F Wilson,W Wislicki,M Witek,L Witola,C P Wong,G Wormser,S A Wotton,H Wu,J Wu,Y Wu,K Wyllie,S Xian,Z Xiang,Y Xie,A Xu,J Xu,L Xu,L Xu,M Xu,Z Xu,Z Xu,Z Xu,D Yang,S Yang,X Yang,Y Yang,Z Yang,Z Yang,V Yeroshenko,H Yeung,H Yin,C Y Yu,J Yu,X Yuan,E Zaffaroni,M Zavertyaev,M Zdybal,M Zeng,C Zhang,D Zhang,J Zhang,L Zhang,S Zhang,S Zhang,Y Zhang,Y Zhang,Y Z Zhang,Y Zhao,A Zharkova,A Zhelezov,X Z Zheng,Y Zheng,T Zhou,X Zhou,Y Zhou,V Zhovkovska,L Z Zhu,X Zhu,X Zhu,Z Zhu,V Zhukov,J Zhuo,Q Zou,D Zuliani,G Zunica

doi:10.1007/jhep05(2024)293

Abstract

Measurements of the branching fraction ratio Bϕ→μ+μ−/Bϕ→e+e−\\documentclass[12pt]{minimal} \\usepackage{amsmath} \\usepackage{wasysym} \\usepackage{amsfonts} \\usepackage{amssymb} \\usepackage{amsbsy} \\usepackage{mathrsfs} \\usepackage{upgreek} \\setlength{\\oddsidemargin}{-69pt} \\begin{document}$$ \\mathcal{B}\\left(\\phi \ o {\\mu}^{+}{\\mu}^{-}\\right)/\\mathcal{B}\\left(\\phi \ o {e}^{+}{e}^{-}\\right) $$\\end{document} with Ds+→π+ϕ\\documentclass[12pt]{minimal} \\usepackage{amsmath} \\usepackage{wasysym} \\usepackage{amsfonts} \\usepackage{amssymb} \\usepackage{amsbsy} \\usepackage{mathrsfs} \\usepackage{upgreek} \\setlength{\\oddsidemargin}{-69pt} \\begin{document}$$ {D}_s^{+}\ o {\\pi}^{+}\\phi $$\\end{document} and D+→ π+ϕ decays, denoted Rϕπs\\documentclass[12pt]{minimal} \\usepackage{amsmath} \\usepackage{wasysym} \\usepackage{amsfonts} \\usepackage{amssymb} \\usepackage{amsbsy} \\usepackage{mathrsfs} \\usepackage{upgreek} \\setlength{\\oddsidemargin}{-69pt} \\begin{document}$$ {R}_{\\phi \\pi}^s $$\\end{document} and Rϕπd\\documentclass[12pt]{minimal} \\usepackage{amsmath} \\usepackage{wasysym} \\usepackage{amsfonts} \\usepackage{amssymb} \\usepackage{amsbsy} \\usepackage{mathrsfs} \\usepackage{upgreek} \\setlength{\\oddsidemargin}{-69pt} \\begin{document}$$ {R}_{\\phi \\pi}^d $$\\end{document}, are presented. The analysis is performed using a dataset corresponding to an integrated luminosity of 5.4 fb−1 of pp collision data collected with the LHCb experiment. The branching fractions are normalised with respect to the B+ → K+J/ψ(→ e+e−) and B+ → K+J/ψ(→ μ+μ−) decay modes. The combination of the results yieldsRϕπ=1.022±0.012stat±0.048syst.\\documentclass[12pt]{minimal} \\usepackage{amsmath} \\usepackage{wasysym} \\usepackage{amsfonts} \\usepackage{amssymb} \\usepackage{amsbsy} \\usepackage{mathrsfs} \\usepackage{upgreek} \\setlength{\\oddsidemargin}{-69pt} \\begin{document}$$ {R}_{\\phi \\pi}=1.022\\pm 0.012\\left(\ extrm{stat}\\right)\\pm 0.048\\left(\ extrm{syst}\\right). $$\\end{document}The result is compatible with previous measurements of the ϕ → ℓ+ℓ− branching fractions and predictions based on the Standard Model.

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