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Search for the lepton-flavor violating decay $B_{s}^{0} \to ϕ μ^{\pm} τ^{\mp}$

R. Aaij ³⁶, A. S. W. Abdelmotteleb ⁵⁵, C. Abellan Beteta⁴⁹, F. Abudinén ⁵⁵, T. Ackernley ⁵⁹, A. A. Adefisoye ⁶⁷, B. Adeva ⁴⁵, M. Adinolfi ⁵³, P. Adlarson ⁷⁹ et al. (LHCb Collaboration)

P. Adlarson ⁷⁹, C. Agapopoulou ¹³, C. A. Aidala ⁸⁰, Z. Ajaltouni¹¹, S. Akar ⁶⁴, K. Akiba ³⁶, P. Albicocco ²⁶, J. Albrecht ¹⁸, F. Alessio ⁴⁷, M. Alexander ⁵⁸, Z. Aliouche ⁶¹, P. Alvarez Cartelle ⁵⁴, R. Amalric ¹⁵, S. Amato ³, J. L. Amey ⁵³, Y. Amhis ^13,47, L. An ⁶, L. Anderlini ²⁵, M. Andersson ⁴⁹, A. Andreianov ⁴², P. Andreola ⁴⁹, M. Andreotti ²⁴, D. Andreou ⁶⁷, A. Anelli ^29,b, D. Ao ⁷, F. Archilli ^35,c, M. Argenton ²⁴, S. Arguedas Cuendis ⁹, A. Artamonov ⁴², M. Artuso ⁶⁷, E. Aslanides ¹², M. Atzeni ⁶³, B. Audurier ¹⁴, D. Bacher ⁶², I. Bachiller Perea ¹⁰, S. Bachmann ²⁰, M. Bachmayer ⁴⁸, J. J. Back ⁵⁵, P. Baladron Rodriguez ⁴⁵, V. Balagura ¹⁴, W. Baldini ²⁴, H. Bao ⁷, J. Baptista de Souza Leite ⁵⁹, M. Barbetti ^25,d, I. R. Barbosa ⁶⁸, R. J. Barlow ⁶¹, M. Barnyakov ²³, S. Barsuk ¹³, W. Barter ⁵⁷, M. Bartolini ⁵⁴, J. Bartz ⁶⁷, F. Baryshnikov ⁴², J. M. Basels ¹⁶, G. Bassi ^33,e, B. Batsukh ⁵, A. Bay ⁴⁸, A. Beck ⁵⁵, M. Becker ¹⁸, F. Bedeschi ³³, I. B. Bediaga ², S. Belin ⁴⁵, V. Bellee ⁴⁹, K. Belous ⁴², I. Belov ²⁷, I. Belyaev ³⁴, G. Benane ¹², G. Bencivenni ²⁶, E. Ben-Haim ¹⁵, A. Berezhnoy ⁴², R. Bernet ⁴⁹, S. Bernet Andres ⁴³, A. Bertolin ³¹, C. Betancourt ⁴⁹, F. Betti ⁵⁷, J. Bex ⁵⁴, Ia. Bezshyiko ⁴⁹, J. Bhom ³⁹, M. S. Bieker ¹⁸, N. V. Biesuz ²⁴, P. Billoir ¹⁵, A. Biolchini ³⁶, M. Birch ⁶⁰, F. C. R. Bishop ¹⁰, A. Bitadze ⁶¹, A. Bizzeti , T. Blake ⁵⁵, F. Blanc ⁴⁸, J. E. Blank ¹⁸, S. Blusk ⁶⁷, V. Bocharnikov ⁴², J. A. Boelhauve ¹⁸, O. Boente Garcia ¹⁴, T. Boettcher ⁶⁴, A. Bohare ⁵⁷, A. Boldyrev ⁴², C. S. Bolognani ⁷⁶, R. Bolzonella ^24,f, N. Bondar ⁴², F. Borgato ^31,47,g, S. Borghi ⁶¹, M. Borsato ^29,b, J. T. Borsuk ³⁹, S. A. Bouchiba ⁴⁸, T. J. V. Bowcock ⁵⁹, A. Boyer ⁴⁷, C. Bozzi ²⁴, M. J. Bradley⁶⁰, A. Brea Rodriguez ⁴⁸, N. Breer ¹⁸, J. Brodzicka ³⁹, A. Brossa Gonzalo ^45,55,44,a, J. Brown ⁵⁹, D. Brundu ³⁰, E. Buchanan⁵⁷, A. Buonaura ⁴⁹, L. Buonincontri ^31,g, A. T. Burke ⁶¹, C. Burr ⁴⁷, A. Butkevich ⁴², J. S. Butter ⁵⁴, J. Buytaert ⁴⁷, W. Byczynski ⁴⁷, S. Cadeddu ³⁰, H. Cai⁷², R. Calabrese ^24,f, S. Calderon Ramirez ⁹, L. Calefice ⁴⁴, S. Cali ²⁶, M. Calvi ^29,b, M. Calvo Gomez ⁴³, P. Camargo Magalhaes ^2,h, J. I. Cambon Bouzas ⁴⁵, P. Campana ²⁶, D. H. Campora Perez ⁷⁶, A. F. Campoverde Quezada ⁷, S. Capelli ²⁹, L. Capriotti ²⁴, R. Caravaca-Mora ⁹, A. Carbone ^23,i, L. Carcedo Salgado ⁴⁵, R. Cardinale ^27,j, A. Cardini ³⁰, P. Carniti ^29,b, L. Carus²⁰, A. Casais Vidal ⁶³, R. Caspary ²⁰, G. Casse ⁵⁹, J. Castro Godinez ⁹, M. Cattaneo ⁴⁷, G. Cavallero ^24,47, V. Cavallini ^24,f, S. Celani ²⁰, D. Cervenkov ⁶², S. Cesare ^28,k, A. J. Chadwick ⁵⁹, I. Chahrour ⁸⁰, M. Charles ¹⁵, Ph. Charpentier ⁴⁷, C. A. Chavez Barajas ⁵⁹, M. Chefdeville ¹⁰, C. Chen ¹², S. Chen ⁵, Z. Chen ⁷, A. Chernov ³⁹, S. Chernyshenko ⁵¹, V. Chobanova ⁷⁸, S. Cholak ⁴⁸, M. Chrzaszcz ³⁹, A. Chubykin ⁴², V. Chulikov ⁴², P. Ciambrone ²⁶, X. Cid Vidal ⁴⁵, G. Ciezarek ⁴⁷, P. Cifra ⁴⁷, P. E. L. Clarke ⁵⁷, M. Clemencic ⁴⁷, H. V. Cliff ⁵⁴, J. Closier ⁴⁷, C. Cocha Toapaxi ²⁰, V. Coco ⁴⁷, J. Cogan ¹², E. Cogneras ¹¹, L. Cojocariu ⁴¹, P. Collins ⁴⁷, T. Colombo ⁴⁷, A. Comerma-Montells ⁴⁴, L. Congedo ²², A. Contu ³⁰, N. Cooke ⁵⁸, I. Corredoira ⁴⁵, A. Correia ¹⁵, G. Corti ⁴⁷, J. J. Cottee Meldrum⁵³, B. Couturier ⁴⁷, D. C. Craik ⁴⁹, M. Cruz Torres ^2,l, E. Curras Rivera ⁴⁸, R. Currie ⁵⁷, C. L. Da Silva ⁶⁶, S. Dadabaev ⁴², L. Dai ⁶⁹, X. Dai ⁶, E. Dall’Occo ¹⁸, J. Dalseno ⁴⁵, C. D’Ambrosio ⁴⁷, J. Daniel ¹¹, A. Danilina ⁴², P. d’Argent ²², A. Davidson ⁵⁵, J. E. Davies ⁶¹, A. Davis ⁶¹, O. De Aguiar Francisco ⁶¹, C. De Angelis ^30,m, F. De Benedetti ⁴⁷, J. de Boer ³⁶, K. De Bruyn ⁷⁵, S. De Capua ⁶¹, M. De Cian ^20,47, U. De Freitas Carneiro Da Graca ^2,n, E. De Lucia ²⁶, J. M. De Miranda ², L. De Paula ³, M. De Serio ^22,o, P. De Simone ²⁶, F. De Vellis ¹⁸, J. A. de Vries ⁷⁶, F. Debernardis ²², D. Decamp ¹⁰, V. Dedu ¹², L. Del Buono ¹⁵, B. Delaney ⁶³, H.-P. Dembinski ¹⁸, J. Deng ⁸, V. Denysenko ⁴⁹, O. Deschamps ¹¹, F. Dettori ^30,m, B. Dey ⁷⁴, P. Di Nezza ²⁶, I. Diachkov ⁴², S. Didenko ⁴², S. Ding ⁶⁷, L. Dittmann ²⁰, V. Dobishuk ⁵¹, A. D. Docheva ⁵⁸, C. Dong ⁴, A. M. Donohoe ²¹, F. Dordei ³⁰, A. C. dos Reis ², A. D. Dowling ⁶⁷, W. Duan ⁷⁰, P. Duda ⁷⁷, M. W. Dudek ³⁹, L. Dufour ⁴⁷, V. Duk ³², P. Durante ⁴⁷, M. M. Duras ⁷⁷, J. M. Durham ⁶⁶, O. D. Durmus ⁷⁴, A. Dziurda ³⁹, A. Dzyuba ⁴², S. Easo ⁵⁶, E. Eckstein¹⁷, U. Egede ¹, A. Egorychev ⁴², V. Egorychev ⁴², S. Eisenhardt ⁵⁷, E. Ejopu ⁶¹, L. Eklund ⁷⁹, M. Elashri ⁶⁴, J. Ellbracht ¹⁸, S. Ely ⁶⁰, A. Ene ⁴¹, E. Epple ⁶⁴, J. Eschle ⁶⁷, S. Esen ²⁰, T. Evans ⁶¹, F. Fabiano ^30,47,m, L. N. Falcao ², Y. Fan ⁷, B. Fang ⁷², L. Fantini ^32,p, M. Faria ⁴⁸, K. Farmer ⁵⁷, D. Fazzini ^29,b, L. Felkowski ⁷⁷, M. Feng ^5,7, M. Feo ^18,47, M. Fernandez Gomez ⁴⁵, A. D. Fernez ⁶⁵, F. Ferrari ²³, F. Ferreira Rodrigues ³, M. Ferrillo ⁴⁹, M. Ferro-Luzzi ⁴⁷, S. Filippov ⁴², R. A. Fini ²², M. Fiorini ^24,f, K. L. Fischer ⁶², D. S. Fitzgerald ⁸⁰, C. Fitzpatrick ⁶¹, F. Fleuret ¹⁴, M. Fontana ²³, L. F. Foreman ⁶¹, R. Forty ⁴⁷, D. Foulds-Holt ⁵⁴, M. Franco Sevilla ⁶⁵, M. Frank ⁴⁷, E. Franzoso ^24,f, G. Frau ²⁰, C. Frei ⁴⁷, D. A. Friday ⁶¹, J. Fu ⁷, Q. Fuehring ¹⁸, Y. Fujii ¹, T. Fulghesu ¹⁵, E. Gabriel ³⁶, G. Galati ²², M. D. Galati ³⁶, A. Gallas Torreira ⁴⁵, D. Galli ^23,i, S. Gambetta ⁵⁷, M. Gandelman ³, P. Gandini ²⁸, B. Ganie ⁶¹, H. Gao ⁷, R. Gao ⁶², Y. Gao ⁸, Y. Gao ⁶, Y. Gao⁸, M. Garau ^30,m, L. M. Garcia Martin ⁴⁸, P. Garcia Moreno ⁴⁴, J. García Pardiñas ⁴⁷, K. G. Garg ⁸, L. Garrido ⁴⁴, C. Gaspar ⁴⁷, R. E. Geertsema ³⁶, L. L. Gerken ¹⁸, E. Gersabeck ⁶¹, M. Gersabeck ⁶¹, T. Gershon ⁵⁵, Z. Ghorbanimoghaddam⁵³, L. Giambastiani ^31,g, F. I. Giasemis ^15,q, V. Gibson ⁵⁴, H. K. Giemza ⁴⁰, A. L. Gilman ⁶², M. Giovannetti ²⁶, A. Gioventù ⁴⁴, P. Gironella Gironell ⁴⁴, C. Giugliano ^24,f, M. A. Giza ³⁹, E. L. Gkougkousis ⁶⁰, F. C. Glaser ^13,20, V. V. Gligorov ^15,47, C. Göbel ⁶⁸, E. Golobardes ⁴³, D. Golubkov ⁴², A. Golutvin ^60,42,47, A. Gomes ^2,a,r, S. Gomez Fernandez ⁴⁴, F. Goncalves Abrantes ⁶², M. Goncerz ³⁹, G. Gong ⁴, J. A. Gooding ¹⁸, I. V. Gorelov ⁴², C. Gotti ²⁹, J. P. Grabowski ¹⁷, L. A. Granado Cardoso ⁴⁷, E. Graugés ⁴⁴, E. Graverini ^48,s, L. Grazette ⁵⁵, G. Graziani , A. T. Grecu ⁴¹, L. M. Greeven ³⁶, N. A. Grieser ⁶⁴, L. Grillo ⁵⁸, S. Gromov ⁴², C. Gu ¹⁴, M. Guarise ²⁴, M. Guittiere ¹³, V. Guliaeva ⁴², P. A. Günther ²⁰, A.-K. Guseinov ⁴⁸, E. Gushchin ⁴², Y. Guz ^6,42,47, T. Gys ⁴⁷, K. Habermann ¹⁷, T. Hadavizadeh ¹, C. Hadjivasiliou ⁶⁵, G. Haefeli ⁴⁸, C. Haen ⁴⁷, J. Haimberger ⁴⁷, M. Hajheidari⁴⁷, M. M. Halvorsen ⁴⁷, P. M. Hamilton ⁶⁵, J. Hammerich ⁵⁹, Q. Han ⁸, X. Han ²⁰, S. Hansmann-Menzemer ²⁰, L. Hao ⁷, N. Harnew ⁶², M. Hartmann ¹³, J. He ^7,t, F. Hemmer ⁴⁷, C. Henderson ⁶⁴, R. D. L. Henderson ^1,55, A. M. Hennequin ⁴⁷, K. Hennessy ⁵⁹, L. Henry ⁴⁸, J. Herd ⁶⁰, P. Herrero Gascon ²⁰, J. Heuel ¹⁶, A. Hicheur ³, G. Hijano Mendizabal⁴⁹, D. Hill ⁴⁸, S. E. Hollitt ¹⁸, J. Horswill ⁶¹, R. Hou ⁸, Y. Hou ¹¹, N. Howarth⁵⁹, J. Hu ²⁰, J. Hu⁷⁰, W. Hu ⁶, X. Hu ⁴, W. Huang ⁷, W. Hulsbergen ³⁶, R. J. Hunter ⁵⁵, M. Hushchyn ⁴², D. Hutchcroft ⁵⁹, D. Ilin ⁴², P. Ilten ⁶⁴, A. Inglessi ⁴², A. Iniukhin ⁴², A. Ishteev ⁴², K. Ivshin ⁴², R. Jacobsson ⁴⁷, H. Jage ¹⁶, S. J. Jaimes Elles ^46,73, S. Jakobsen ⁴⁷, E. Jans ³⁶, B. K. Jashal ⁴⁶, A. Jawahery ^65,47, V. Jevtic ¹⁸, E. Jiang ⁶⁵, X. Jiang ^5,7, Y. Jiang ⁷, Y. J. Jiang ⁶, M. John ⁶², D. Johnson ⁵², C. R. Jones ⁵⁴, T. P. Jones ⁵⁵, S. Joshi ⁴⁰, B. Jost ⁴⁷, N. Jurik ⁴⁷, I. Juszczak ³⁹, D. Kaminaris ⁴⁸, S. Kandybei ⁵⁰, Y. Kang ⁴, C. Kar ¹¹, M. Karacson ⁴⁷, D. Karpenkov ⁴², A. Kauniskangas ⁴⁸, J. W. Kautz ⁶⁴, F. Keizer ⁴⁷, M. Kenzie ⁵⁴, T. Ketel ³⁶, B. Khanji ⁶⁷, A. Kharisova ⁴², S. Kholodenko ^33,47, G. Khreich ¹³, T. Kirn ¹⁶, V. S. Kirsebom ^29,b, O. Kitouni ⁶³, S. Klaver ³⁷, N. Kleijne ^33,e, K. Klimaszewski ⁴⁰, M. R. Kmiec ⁴⁰, S. Koliiev ⁵¹, L. Kolk ¹⁸, A. Konoplyannikov ⁴², P. Kopciewicz ^38,47, P. Koppenburg ³⁶, M. Korolev ⁴², I. Kostiuk ³⁶, O. Kot⁵¹, S. Kotriakhova , A. Kozachuk ⁴², P. Kravchenko ⁴², L. Kravchuk ⁴², M. Kreps ⁵⁵, P. Krokovny ⁴², W. Krupa ⁶⁷, W. Krzemien ⁴⁰, O. K. Kshyvanskyi⁵¹, J. Kubat²⁰, S. Kubis ⁷⁷, M. Kucharczyk ³⁹, V. Kudryavtsev ⁴², E. Kulikova ⁴², A. Kupsc ⁷⁹, B. K. Kutsenko ¹², D. Lacarrere ⁴⁷, A. Lai ³⁰, A. Lampis ³⁰, D. Lancierini ⁵⁴, C. Landesa Gomez ⁴⁵, J. J. Lane ¹, R. Lane ⁵³, C. Langenbruch ²⁰, J. Langer ¹⁸, O. Lantwin ⁴², T. Latham ⁵⁵, F. Lazzari ^33,s, C. Lazzeroni ⁵², R. Le Gac ¹², R. Lefèvre ¹¹, A. Leflat ⁴², S. Legotin ⁴², M. Lehuraux ⁵⁵, E. Lemos Cid ⁴⁷, O. Leroy ¹², T. Lesiak ³⁹, B. Leverington ²⁰, A. Li ⁴, H. Li ⁷⁰, K. Li ⁸, L. Li ⁶¹, P. Li ⁴⁷, P.-R. Li ⁷¹, Q. Li ^5,7, S. Li ⁸, T. Li ^5,u, T. Li ⁷⁰, Y. Li ⁸, Y. Li⁵, Z. Lian ⁴, X. Liang ⁶⁷, S. Libralon ⁴⁶, C. Lin ⁷, T. Lin ⁵⁶, R. Lindner ⁴⁷, V. Lisovskyi ⁴⁸, R. Litvinov ³⁰, F. L. Liu ¹, G. Liu ⁷⁰, K. Liu ⁷¹, S. Liu ^5,7, Y. Liu ⁵⁷, Y. Liu⁷¹, Y. L. Liu ⁶⁰, A. Lobo Salvia ⁴⁴, A. Loi ³⁰, J. Lomba Castro ⁴⁵, T. Long ⁵⁴, J. H. Lopes ³, A. Lopez Huertas ⁴⁴, S. López Soliño ⁴⁵, C. Lucarelli ^25,d, D. Lucchesi ^31,g, M. Lucio Martinez ⁷⁶, V. Lukashenko ^36,51, Y. Luo ⁶, A. Lupato ³¹, E. Luppi ^24,f, K. Lynch ²¹, X.-R. Lyu ⁷, G. M. Ma ⁴, R. Ma ⁷, S. Maccolini ¹⁸, F. Machefert ¹³, F. Maciuc ⁴¹, B. Mack ⁶⁷, I. Mackay ⁶², L. M. Mackey ⁶⁷, L. R. Madhan Mohan ⁵⁴, M. J. Madurai ⁵², A. Maevskiy ⁴², D. Magdalinski ³⁶, D. Maisuzenko ⁴², M. W. Majewski³⁸, J. J. Malczewski ³⁹, S. Malde ⁶², L. Malentacca⁴⁷, A. Malinin ⁴², T. Maltsev ⁴², G. Manca ^30,m, G. Mancinelli ¹², C. Mancuso ^28,13,k, R. Manera Escalero ⁴⁴, D. Manuzzi ²³, D. Marangotto ^28,k, J. F. Marchand ¹⁰, R. Marchevski ⁴⁸, U. Marconi ²³, S. Mariani ⁴⁷, C. Marin Benito ⁴⁴, J. Marks ²⁰, A. M. Marshall ⁵³, G. Martelli ^32,p, G. Martellotti ³⁴, L. Martinazzoli ⁴⁷, M. Martinelli ^29,b, D. Martinez Santos ⁴⁵, F. Martinez Vidal ⁴⁶, A. Massafferri ², R. Matev ⁴⁷, A. Mathad ⁴⁷, V. Matiunin ⁴², C. Matteuzzi ⁶⁷, K. R. Mattioli ¹⁴, A. Mauri ⁶⁰, E. Maurice ¹⁴, J. Mauricio ⁴⁴, P. Mayencourt ⁴⁸, M. Mazurek ⁴⁰, M. McCann ⁶⁰, L. 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Seuthe ¹⁸, Y. Shang ⁶, D. M. Shangase ⁸⁰, M. Shapkin ⁴², R. S. Sharma ⁶⁷, I. Shchemerov ⁴², L. Shchutska ⁴⁸, T. Shears ⁵⁹, L. Shekhtman ⁴², Z. Shen ⁶, S. Sheng ^5,7, V. Shevchenko ⁴², B. Shi ⁷, Q. Shi ⁷, E. B. Shields ^29,b, Y. Shimizu ¹³, E. Shmanin ⁴², R. Shorkin ⁴², J. D. Shupperd ⁶⁷, R. Silva Coutinho ⁶⁷, G. Simi ^31,g, S. Simone ^22,o, N. Skidmore ⁵⁵, T. Skwarnicki ⁶⁷, M. W. Slater ⁵², J. C. Smallwood ⁶², E. Smith ⁶³, K. Smith ⁶⁶, M. Smith ⁶⁰, A. Snoch ³⁶, L. Soares Lavra ⁵⁷, M. D. Sokoloff ⁶⁴, F. J. P. Soler ⁵⁸, A. Solomin ^42,53, A. Solovev ⁴², I. Solovyev ⁴², R. Song ¹, Y. Song ⁴⁸, Y. Song ⁴, Y. S. Song ⁶, F. L. Souza De Almeida ⁶⁷, B. Souza De Paula ³, E. Spadaro Norella ^28,k, E. Spedicato ²³, J. G. Speer ¹⁸, E. Spiridenkov⁴², P. Spradlin ⁵⁸, V. Sriskaran ⁴⁷, F. Stagni ⁴⁷, M. Stahl ⁴⁷, S. Stahl ⁴⁷, S. Stanislaus ⁶², E. N. Stein ⁴⁷, O. Steinkamp ⁴⁹, O. Stenyakin⁴², H. Stevens ¹⁸, D. Strekalina ⁴², Y. Su ⁷, F. Suljik ⁶², J. Sun ³⁰, L. Sun ⁷², Y. Sun ⁶⁵, D. Sundfeld ², W. Sutcliffe⁴⁹, P. N. Swallow ⁵², F. Swystun ⁵⁴, A. Szabelski ⁴⁰, T. Szumlak ³⁸, Y. Tan ⁴, M. D. Tat ⁶², A. Terentev ⁴², F. Terzuoli ^33,z, F. Teubert ⁴⁷, E. Thomas ⁴⁷, D. J. D. Thompson ⁵², H. Tilquin ⁶⁰, V. Tisserand ¹¹, S. T’Jampens ¹⁰, M. Tobin ⁵, L. Tomassetti ^24,f, G. Tonani ^28,47,k, X. Tong ⁶, D. Torres Machado ², L. Toscano ¹⁸, D. Y. Tou ⁴, C. Trippl ⁴³, G. Tuci ²⁰, N. Tuning ³⁶, L. H. Uecker ²⁰, A. Ukleja ³⁸, D. J. Unverzagt ²⁰, E. Ursov ⁴², A. Usachov ³⁷, A. Ustyuzhanin ⁴², U. Uwer ²⁰, V. Vagnoni ²³, A. Valassi ⁴⁷, G. Valenti ²³, N. Valls Canudas ⁴⁷, H. Van Hecke ⁶⁶, E. van Herwijnen ⁶⁰, C. B. Van Hulse ^45,aa, R. Van Laak ⁴⁸, M. van Veghel ³⁶, G. Vasquez ⁴⁹, R. Vazquez Gomez ⁴⁴, P. Vazquez Regueiro ⁴⁵, C. Vázquez Sierra ⁴⁵, S. Vecchi ²⁴, J. J. Velthuis ⁵³, M. Veltri ^25,bb, A. Venkateswaran ⁴⁸, M. Vesterinen ⁵⁵, M. Vieites Diaz ⁴⁷, X. Vilasis-Cardona ⁴³, E. Vilella Figueras ⁵⁹, A. Villa ²³, P. Vincent ¹⁵, F. C. Volle ⁵², D. vom Bruch ¹², N. Voropaev ⁴², K. Vos ⁷⁶, G. 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Zdybal ³⁹, C. Zeng ^5,7, M. Zeng ⁴, C. Zhang ⁶, D. Zhang ⁸, J. Zhang ⁷, L. Zhang ⁴, S. Zhang ⁶⁹, S. Zhang ⁶, Y. Zhang ⁶, Y. Z. Zhang ⁴, Y. Zhao ²⁰, A. Zharkova ⁴², A. Zhelezov ²⁰, X. Z. Zheng ⁴, Y. Zheng ⁷, T. Zhou ⁶, X. Zhou ⁸, Y. Zhou ⁷, V. Zhovkovska ⁵⁵, L. Z. Zhu ⁷, X. Zhu ⁴, X. Zhu ⁸, V. Zhukov ¹⁶, J. Zhuo ⁴⁶, Q. Zou ^5,7, D. Zuliani ^31,g, and G. Zunica ⁴⁸ (LHCb Collaboration)

¹School of Physics and Astronomy, Monash University, Melbourne, Australia
²Centro Brasileiro de Pesquisas Físicas (CBPF), Rio de Janeiro, Brazil
³Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil
⁴Center for High Energy Physics, Tsinghua University, Beijing, China
⁵Institute of High Energy Physics (IHEP), Beijing, China
⁶School of Physics State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing, China
⁷University of Chinese Academy of Sciences, Beijing, China
⁸Institute of Particle Physics, Central China Normal University, Wuhan, Hubei, China
⁹Consejo Nacional de Rectores (CONARE), San Jose, Costa Rica
¹⁰Université Savoie Mont Blanc, CNRS, IN2P3-LAPP, Annecy, France
¹¹Université Clermont Auvergne, CNRS/IN2P3, LPC, Clermont-Ferrand, France
¹²Aix Marseille Univ, CNRS/IN2P3, CPPM, Marseille, France
¹³Université Paris-Saclay, CNRS/IN2P3, IJCLab, Orsay, France
¹⁴Laboratoire Leprince-Ringuet, CNRS/IN2P3, Ecole Polytechnique, Institut Polytechnique de Paris, Palaiseau, France
¹⁵LPNHE, Sorbonne Université, Paris Diderot Sorbonne Paris Cité, CNRS/IN2P3, Paris, France
¹⁶I. Physikalisches Institut, RWTH Aachen University, Aachen, Germany
¹⁷Universität Bonn—Helmholtz-Institut für Strahlen und Kernphysik, Bonn, Germany
¹⁸Fakultät Physik, Technische Universität Dortmund, Dortmund, Germany
¹⁹Max-Planck-Institut für Kernphysik (MPIK), Heidelberg, Germany
²⁰Physikalisches Institut, Ruprecht-Karls-Universität Heidelberg, Heidelberg, Germany
²¹School of Physics, University College Dublin, Dublin, Ireland
²²INFN Sezione di Bari, Bari, Italy
²³INFN Sezione di Bologna, Bologna, Italy
²⁴INFN Sezione di Ferrara, Ferrara, Italy
²⁵INFN Sezione di Firenze, Firenze, Italy
²⁶INFN Laboratori Nazionali di Frascati, Frascati, Italy
²⁷INFN Sezione di Genova, Genova, Italy
²⁸INFN Sezione di Milano, Milano, Italy
²⁹INFN Sezione di Milano-Bicocca, Milano, Italy
³⁰INFN Sezione di Cagliari, Monserrato, Italy
³¹INFN Sezione di Padova, Padova, Italy
³²INFN Sezione di Perugia, Perugia, Italy
³³INFN Sezione di Pisa, Pisa, Italy
³⁴INFN Sezione di Roma La Sapienza, Roma, Italy
³⁵INFN Sezione di Roma Tor Vergata, Roma, Italy
³⁶Nikhef National Institute for Subatomic Physics, Amsterdam, Netherlands
³⁷Nikhef National Institute for Subatomic Physics and VU University Amsterdam, Amsterdam, Netherlands
³⁸AGH—University of Krakow, Faculty of Physics and Applied Computer Science, Kraków, Poland
³⁹Henryk Niewodniczanski Institute of Nuclear Physics Polish Academy of Sciences, Kraków, Poland
⁴⁰National Center for Nuclear Research (NCBJ), Warsaw, Poland
⁴¹Horia Hulubei National Institute of Physics and Nuclear Engineering, Bucharest-Magurele, Romania
⁴²Affiliated with an institute covered by a cooperation agreement with CERN
⁴³DS4DS, La Salle, Universitat Ramon Llull, Barcelona, Spain
⁴⁴ICCUB, Universitat de Barcelona, Barcelona, Spain
⁴⁵Instituto Galego de Física de Altas Enerxías (IGFAE), Universidade de Santiago de Compostela, Santiago de Compostela, Spain
⁴⁶Instituto de Fisica Corpuscular, Centro Mixto Universidad de Valencia—CSIC, Valencia, Spain
⁴⁷European Organization for Nuclear Research (CERN), Geneva, Switzerland
⁴⁸Institute of Physics, Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
⁴⁹Physik-Institut, Universität Zürich, Zürich, Switzerland
⁵⁰NSC Kharkiv Institute of Physics and Technology (NSC KIPT), Kharkiv, Ukraine
⁵¹Institute for Nuclear Research of the National Academy of Sciences (KINR), Kyiv, Ukraine
⁵²School of Physics and Astronomy, University of Birmingham, Birmingham, United Kingdom
⁵³H.H. Wills Physics Laboratory, University of Bristol, Bristol, United Kingdom
⁵⁴Cavendish Laboratory, University of Cambridge, Cambridge, United Kingdom
⁵⁵Department of Physics, University of Warwick, Coventry, United Kingdom
⁵⁶STFC Rutherford Appleton Laboratory, Didcot, United Kingdom
⁵⁷School of Physics and Astronomy, University of Edinburgh, Edinburgh, United Kingdom
⁵⁸School of Physics and Astronomy, University of Glasgow, Glasgow, United Kingdom
⁵⁹Oliver Lodge Laboratory, University of Liverpool, Liverpool, United Kingdom
⁶⁰Imperial College London, London, United Kingdom
⁶¹Department of Physics and Astronomy, University of Manchester, Manchester, United Kingdom
⁶²Department of Physics, University of Oxford, Oxford, United Kingdom
⁶³Massachusetts Institute of Technology, Cambridge, Massachusetts, USA
⁶⁴University of Cincinnati, Cincinnati, Ohio, USA
⁶⁵University of Maryland, College Park, Maryland, USA
⁶⁶Los Alamos National Laboratory (LANL), Los Alamos, New Mexico, USA
⁶⁷Syracuse University, Syracuse, New York, USA
⁶⁸Pontifícia Universidade Católica do Rio de Janeiro (PUC-Rio), Rio de Janeiro, Brazil (associated with Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil)
⁶⁹School of Physics and Electronics, Hunan University, Changsha City, China (associated with Institute of Particle Physics, Central China Normal University, Wuhan, Hubei, China)
⁷⁰Guangdong Provincial Key Laboratory of Nuclear Science, Guangdong-Hong Kong Joint Laboratory of Quantum Matter, Institute of Quantum Matter, South China Normal University, Guangzhou, China (associated with Center for High Energy Physics, Tsinghua University, Beijing, China)
⁷¹Lanzhou University, Lanzhou, China (associated with Institute Of High Energy Physics (IHEP), Beijing, China)
⁷²School of Physics and Technology, Wuhan University, Wuhan, China (associated with Center for High Energy Physics, Tsinghua University, Beijing, China)
⁷³Departamento de Fisica, Universidad Nacional de Colombia, Bogota, Colombia (associated with LPNHE, Sorbonne Université, Paris Diderot Sorbonne Paris Cité, CNRS/IN2P3, Paris, France)
⁷⁴Eotvos Lorand University, Budapest, Hungary (associated with European Organization for Nuclear Research (CERN)), Geneva, Switzerland)
⁷⁵Van Swinderen Institute, University of Groningen, Groningen, Netherlands (associated with Nikhef National Institute for Subatomic Physics, Amsterdam, Netherlands)
⁷⁶Universiteit Maastricht, Maastricht, Netherlands (associated with Nikhef National Institute for Subatomic Physics, Amsterdam, Netherlands)
⁷⁷Tadeusz Kosciuszko Cracow University of Technology, Cracow, Poland (associated with Henryk Niewodniczanski Institute of Nuclear Physics Polish Academy of Sciences, Kraków, Poland)
⁷⁸Universidade da Coruña, A Coruna, Spain (associated with DS4DS, La Salle, Universitat Ramon Llull, Barcelona, Spain)
⁷⁹Department of Physics and Astronomy, Uppsala University, Uppsala, Sweden (associated with School of Physics and Astronomy, University of Glasgow, Glasgow, United Kingdom)
⁸⁰University of Michigan, Ann Arbor, Michigan, USA (associated with Syracuse University, Syracuse, New York, USA)
⁸¹Département de Physique Nucléaire (DPhN), Gif-Sur-Yvette, France

^*Full author list given at the end of the article.
^aDeceased.
^bAlso at Università degli Studi di Milano-Bicocca, Milano, Italy.
^cAlso at Università di Roma Tor Vergata, Roma, Italy.
^dAlso at Università di Firenze, Firenze, Italy.
^eAlso at Scuola Normale Superiore, Pisa, Italy.
^fAlso at Università di Ferrara, Ferrara, Italy.
^gAlso at Università di Padova, Padova, Italy.
^hAlso at Facultad de Ciencias Fisicas, Madrid, Spain.
ⁱAlso at Università di Bologna, Bologna, Italy.
^jAlso at Università di Genova, Genova, Italy.
^kAlso at Università degli Studi di Milano, Milano, Italy.
^lAlso at Universidad Nacional Autónoma de Honduras, Tegucigalpa, Honduras.
^mAlso at Università di Cagliari, Cagliari, Italy.
ⁿAlso at Centro Federal de Educacão Tecnológica Celso Suckow da Fonseca, Rio De Janeiro, Brazil.
^oAlso at Università di Bari, Bari, Italy.
^pAlso at Università di Perugia, Perugia, Italy.
^qAlso at LIP6, Sorbonne Université, Paris, France.
^rAlso at Universidade de Brasília, Brasília, Brazil.
^sAlso at Università di Pisa, Pisa, Italy.
^tAlso at Hangzhou Institute for Advanced Study, UCAS, Hangzhou, China.
^uAlso at School of Physics and Electronics, Henan University, Kaifeng, China.
^vAlso at Excellence Cluster ORIGINS, Munich, Germany.
^wAlso at Università di Bergamo, Bergamo, Italy.
^xAlso at Department of Physics/Division of Particle Physics, Lund, Sweden.
^yAlso at Università della Basilicata, Potenza, Italy.
^zAlso at Università di Siena, Siena, Italy.
^aaAlso at Universidad de Alcalá, Alcalá de Henares, Spain.
^bbAlso at Università di Urbino, Urbino, Italy.

PDF

Phys. Rev. D 110, 072014 – Published 21 October, 2024

DOI: https://doi.org/10.1103/PhysRevD.110.072014

Abstract

A search for the lepton-flavor violating decays $B_{s}^{0} \to ϕ μ^{\pm} τ^{\mp}$ is presented, using a sample of proton-proton collisions at center-of-mass energies of 7, 8, and 13 TeV, collected with the LHCb detector and corresponding to a total integrated luminosity of $9 {fb}^{- 1}$ . The $τ$ leptons are selected using decays with three charged pions. No significant excess is observed, and an upper limit on the branching fraction is determined to be $B (B_{s}^{0} \to ϕ μ^{\pm} τ^{\mp}) < 1.0 \times 10^{- 5}$ at 90% confidence level.

Physics Subject Headings (PhySH)

Article Text

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Phys. Rev. D 110, 072014– Published 21 October, 2024

Vol. 110, Iss. 7 — 1 October 2024

Received 24 May 2024
Accepted 6 September 2024

DOI: https://doi.org/10.1103/PhysRevD.110.072014

Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP³.

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Search for the lepton-flavor violating decay $B_{s}^{0} \to ϕ μ^{\pm} τ^{\mp}$

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Search for the lepton-flavor violating decay Bs0→ϕμ±τ∓

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Search for the lepton-flavor violating decay $B_{s}^{0} \to ϕ μ^{\pm} τ^{\mp}$