Search for lepton-flavour-violating decays of Higgs-like bosons

R Aaij; C Abellán Beteta; B Adeva; M Adinolfi; C A Aidala; Z Ajaltouni; S Akar; P Albicocco; J Albrecht; F Alessio; M Alexander; A Alfonso Albero; G Alkhazov; P Alvarez Cartelle; A A Alves Jr; S Amato; S Amerio; Y Amhis; L An; L Anderlini; G Andreassi; M Andreotti; J E Andrews; R B Appleby; F Archilli; P d'Argent; J Arnau Romeu; A Artamonov; M Artuso; K Arzymatov; E Aslanides; M Atzeni; B Audurier; S Bachmann; J J Back; S Baker; V Balagura; W Baldini; A Baranov; R J Barlow; S Barsuk; W Barter; F Baryshnikov; V Batozskaya; B Batsukh; V Battista; A Bay; J Beddow; F Bedeschi; I Bediaga; A Beiter; L J Bel; S Belin; N Beliy; V Bellee; N Belloli; K Belous; I Belyaev; E Ben-Haim; G Bencivenni; S Benson; S Beranek; A Berezhnoy; R Bernet; D Berninghoff; E Bertholet; A Bertolin; C Betancourt; F Betti; M O Bettler; M van Beuzekom; Ia Bezshyiko; S Bhasin; J Bhom; S Bifani; P Billoir; A Birnkraut; A Bizzeti; M Bjørn; M P Blago; T Blake; F Blanc; S Blusk; D Bobulska; V Bocci; O Boente Garcia; T Boettcher; A Bondar; N Bondar; S Borghi; M Borisyak; M Borsato; F Bossu; M Boubdir; T J V Bowcock; C Bozzi; S Braun; M Brodski; J Brodzicka; A Brossa Gonzalo; D Brundu; E Buchanan; A Buonaura; C Burr; A Bursche; J Buytaert; W Byczynski; S Cadeddu; H Cai; R Calabrese; R Calladine; M Calvi; M Calvo Gomez; A Camboni; P Campana; D H Campora Perez; L Capriotti; A Carbone; G Carboni; R Cardinale; A Cardini; P Carniti; L Carson; K Carvalho Akiba; G Casse; L Cassina; M Cattaneo; G Cavallero; R Cenci; D Chamont; M G Chapman; M Charles; Ph Charpentier; G Chatzikonstantinidis; M Chefdeville; V Chekalina; C Chen; S Chen; S-G Chitic; V Chobanova; M Chrzaszcz; A Chubykin; P Ciambrone; X Cid Vidal; G Ciezarek; P E L Clarke; M Clemencic; H V Cliff; J Closier; V Coco; J A B Coelho; J Cogan; E Cogneras; L Cojocariu; P Collins; T Colombo; A Comerma-Montells; A Contu; G Coombs; S Coquereau; G Corti; M Corvo; C M Costa Sobral; B Couturier; G A Cowan; D C Craik; A Crocombe; M Cruz Torres; R Currie; C D'Ambrosio; F Da Cunha Marinho; C L Da Silva; E Dall'Occo; J Dalseno; A Danilina; A Davis; O De Aguiar Francisco; K De Bruyn; S De Capua; M De Cian; J M De Miranda; L De Paula; M De Serio; P De Simone; C T Dean; D Decamp; L Del Buono; B Delaney; H-P Dembinski; M Demmer; A Dendek; D Derkach; O Deschamps; F Desse; F Dettori; B Dey; A Di Canto; P Di Nezza; S Didenko; H Dijkstra; F Dordei; M Dorigo; A Dosil Suárez; L Douglas; A Dovbnya; K Dreimanis; L Dufour; G Dujany; P Durante; J M Durham; D Dutta; R Dzhelyadin; M Dziewiecki; A Dziurda; A Dzyuba; S Easo; U Egede; V Egorychev; S Eidelman; S Eisenhardt; U Eitschberger; R Ekelhof; L Eklund; S Ely; A Ene; S Escher; S Esen; T Evans; A Falabella; N Farley; S Farry; D Fazzini; L Federici; P Fernandez Declara; A Fernandez Prieto; F Ferrari; L Ferreira Lopes; F Ferreira Rodrigues; M Ferro-Luzzi; S Filippov; R A Fini; M Fiorini; M Firlej; C Fitzpatrick; T Fiutowski; F Fleuret; M Fontana; F Fontanelli; R Forty; V Franco Lima; M Frank; C Frei; J Fu; W Funk; C Färber; M Féo Pereira Rivello Carvalho; 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D Hutchcroft; D Hynds; P Ibis; M Idzik; P Ilten; K Ivshin; R Jacobsson; J Jalocha; E Jans; A Jawahery; F Jiang; M John; D Johnson; C R Jones; C Joram; B Jost; N Jurik; S Kandybei; M Karacson; J M Kariuki; S Karodia; N Kazeev; M Kecke; F Keizer; M Kelsey; M Kenzie; T Ketel; E Khairullin; B Khanji; C Khurewathanakul; K E Kim; T Kirn; S Klaver; K Klimaszewski; T Klimkovich; S Koliiev; M Kolpin; R Kopecna; P Koppenburg; I Kostiuk; S Kotriakhova; M Kozeiha; L Kravchuk; M Kreps; F Kress; P Krokovny; W Krupa; W Krzemien; W Kucewicz; M Kucharczyk; V Kudryavtsev; A K Kuonen; T Kvaratskheliya; D Lacarrere; G Lafferty; A Lai; D Lancierini; G Lanfranchi; C Langenbruch; T Latham; C Lazzeroni; R Le Gac; A Leflat; J Lefrançois; R Lefèvre; F Lemaitre; O Leroy; T Lesiak; B Leverington; P-R Li; T Li; Z Li; X Liang; T Likhomanenko; R Lindner; F Lionetto; V Lisovskyi; X Liu; D Loh; A Loi; I Longstaff; J H Lopes; G H Lovell; D Lucchesi; M Lucio Martinez; A Lupato; E Luppi; O Lupton; A Lusiani; X Lyu; F Machefert; 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D Vieira; M Vieites Diaz; H Viemann; X Vilasis-Cardona; A Vitkovskiy; M Vitti; V Volkov; A Vollhardt; D Vom Bruch; B Voneki; A Vorobyev; V Vorobyev; J A de Vries; C Vázquez Sierra; R Waldi; J Walsh; J Wang; M Wang; Y Wang; Z Wang; D R Ward; H M Wark; N K Watson; D Websdale; A Weiden; C Weisser; M Whitehead; J Wicht; G Wilkinson; M Wilkinson; I Williams; M R J Williams; M Williams; T Williams; F F Wilson; J Wimberley; M Winn; J Wishahi; W Wislicki; M Witek; G Wormser; S A Wotton; K Wyllie; D Xiao; Y Xie; A Xu; M Xu; Q Xu; Z Xu; Z Xu; Z Yang; Z Yang; Y Yao; L E Yeomans; H Yin; J Yu; X Yuan; O Yushchenko; K A Zarebski; M Zavertyaev; D Zhang; L Zhang; W C Zhang; Y Zhang; A Zhelezov; Y Zheng; X Zhu; V Zhukov; J B Zonneveld; S Zucchelli

doi:10.1140/epjc/s10052-018-6386-8

Search for lepton-flavour-violating decays of Higgs-like bosons

Eur Phys J C Part Fields. 2018;78(12):1008. doi: 10.1140/epjc/s10052-018-6386-8. Epub 2018 Dec 12.

Authors

R Aaij¹, C Abellán Beteta², B Adeva³, M Adinolfi⁴, C A Aidala⁵, Z Ajaltouni⁶, S Akar⁷, P Albicocco⁸, J Albrecht⁹, F Alessio¹⁰, M Alexander¹¹, A Alfonso Albero¹², G Alkhazov¹³, P Alvarez Cartelle¹⁴, A A Alves Jr³, S Amato¹⁵, S Amerio¹⁶, Y Amhis¹⁷, L An¹⁸, L Anderlini¹⁹, G Andreassi²⁰, M Andreotti²¹, J E Andrews²², R B Appleby²³, F Archilli¹, P d'Argent²⁴, J Arnau Romeu²⁵, A Artamonov²⁶, M Artuso²⁷, K Arzymatov²⁸, E Aslanides²⁵, M Atzeni², B Audurier²⁹, S Bachmann²⁴, J J Back³⁰, S Baker¹⁴, V Balagura¹⁷, W Baldini²¹, A Baranov²⁸, R J Barlow²³, S Barsuk¹⁷, W Barter²³, F Baryshnikov³¹, V Batozskaya³², B Batsukh²⁷, V Battista²⁰, A Bay²⁰, J Beddow¹¹, F Bedeschi³³, I Bediaga³⁴, A Beiter²⁷, L J Bel¹, S Belin²⁹, N Beliy³⁵, V Bellee²⁰, N Belloli³⁶, K Belous²⁶, I Belyaev^{37

10}, E Ben-Haim³⁸, G Bencivenni⁸, S Benson¹, S Beranek³⁹, A Berezhnoy⁴⁰, R Bernet², D Berninghoff²⁴, E Bertholet³⁸, A Bertolin¹⁶, C Betancourt², F Betti^{41

10}, M O Bettler⁴², M van Beuzekom¹, Ia Bezshyiko², S Bhasin⁴, J Bhom⁴³, S Bifani⁴⁴, P Billoir³⁸, A Birnkraut⁹, A Bizzeti¹⁹, M Bjørn⁴⁵, M P Blago¹⁰, T Blake³⁰, F Blanc²⁰, S Blusk²⁷, D Bobulska¹¹, V Bocci⁴⁶, O Boente Garcia³, T Boettcher⁴⁷, A Bondar⁴⁸, N Bondar¹³, S Borghi^{10

23}, M Borisyak²⁸, M Borsato³, F Bossu¹⁷, M Boubdir³⁹, T J V Bowcock⁴⁹, C Bozzi^{21

10}, S Braun²⁴, M Brodski¹⁰, J Brodzicka⁴³, A Brossa Gonzalo³⁰, D Brundu²⁹, E Buchanan⁴, A Buonaura², C Burr²³, A Bursche²⁹, J Buytaert¹⁰, W Byczynski¹⁰, S Cadeddu²⁹, H Cai⁵⁰, R Calabrese²¹, R Calladine⁴⁴, M Calvi³⁶, M Calvo Gomez¹², A Camboni¹², P Campana⁸, D H Campora Perez¹⁰, L Capriotti²³, A Carbone⁴¹, G Carboni⁵¹, R Cardinale⁵², A Cardini²⁹, P Carniti³⁶, L Carson⁵³, K Carvalho Akiba¹⁵, G Casse⁴⁹, L Cassina³⁶, M Cattaneo¹⁰, G Cavallero⁵², R Cenci³³, D Chamont¹⁷, M G Chapman⁴, M Charles³⁸, Ph Charpentier¹⁰, G Chatzikonstantinidis⁴⁴, M Chefdeville⁵⁴, V Chekalina²⁸, C Chen¹⁸, S Chen²⁹, S-G Chitic¹⁰, V Chobanova³, M Chrzaszcz¹⁰, A Chubykin¹³, P Ciambrone⁸, X Cid Vidal³, G Ciezarek¹⁰, P E L Clarke⁵³, M Clemencic¹⁰, H V Cliff⁴², J Closier¹⁰, V Coco¹⁰, J A B Coelho¹⁷, J Cogan²⁵, E Cogneras⁶, L Cojocariu⁵⁵, P Collins¹⁰, T Colombo¹⁰, A Comerma-Montells²⁴, A Contu²⁹, G Coombs¹⁰, S Coquereau¹², G Corti¹⁰, M Corvo²¹, C M Costa Sobral³⁰, B Couturier¹⁰, G A Cowan⁵³, D C Craik⁴⁷, A Crocombe³⁰, M Cruz Torres³⁴, R Currie⁵³, C D'Ambrosio¹⁰, F Da Cunha Marinho¹⁵, C L Da Silva⁵⁶, E Dall'Occo¹, J Dalseno⁴, A Danilina³⁷, A Davis¹⁸, O De Aguiar Francisco¹⁰, K De Bruyn¹⁰, S De Capua²³, M De Cian²⁰, J M De Miranda³⁴, L De Paula¹⁵, M De Serio⁵⁷, P De Simone⁸, C T Dean¹¹, D Decamp⁵⁴, L Del Buono³⁸, B Delaney⁴², H-P Dembinski⁵⁸, M Demmer⁹, A Dendek⁵⁹, D Derkach²⁸, O Deschamps⁶, F Desse¹⁷, F Dettori⁴⁹, B Dey⁶⁰, A Di Canto¹⁰, P Di Nezza⁸, S Didenko³¹, H Dijkstra¹⁰, F Dordei¹⁰, M Dorigo¹⁰, A Dosil Suárez³, L Douglas¹¹, A Dovbnya⁶¹, K Dreimanis⁴⁹, L Dufour¹, G Dujany³⁸, P Durante¹⁰, J M Durham⁵⁶, D Dutta²³, R Dzhelyadin²⁶, M Dziewiecki²⁴, A Dziurda⁴³, A Dzyuba¹³, S Easo⁶², U Egede¹⁴, V Egorychev³⁷, S Eidelman⁴⁸, S Eisenhardt⁵³, U Eitschberger⁹, R Ekelhof⁹, L Eklund¹¹, S Ely²⁷, A Ene⁵⁵, S Escher³⁹, S Esen¹, T Evans⁷, A Falabella⁴¹, N Farley⁴⁴, S Farry⁴⁹, D Fazzini^{36

10}, L Federici⁵¹, P Fernandez Declara¹⁰, A Fernandez Prieto³, F Ferrari⁴¹, L Ferreira Lopes²⁰, F Ferreira Rodrigues¹⁵, M Ferro-Luzzi¹⁰, S Filippov⁶³, R A Fini⁵⁷, M Fiorini²¹, M Firlej⁵⁹, C Fitzpatrick²⁰, T Fiutowski⁵⁹, F Fleuret¹⁷, M Fontana^{29

10}, F Fontanelli⁵², R Forty¹⁰, V Franco Lima⁴⁹, M Frank¹⁰, C Frei¹⁰, J Fu⁶⁴, W Funk¹⁰, C Färber¹⁰, M Féo Pereira Rivello Carvalho¹, E Gabriel⁵³, A Gallas Torreira³, D Galli⁴¹, S Gallorini¹⁶, S Gambetta⁵³, Y Gan¹⁸, M Gandelman¹⁵, P Gandini⁶⁴, Y Gao¹⁸, L M Garcia Martin⁶⁵, B Garcia Plana³, J García Pardiñas², J Garra Tico⁴², L Garrido¹², D Gascon¹², C Gaspar¹⁰, L Gavardi⁹, G Gazzoni⁶, D Gerick²⁴, E Gersabeck²³, M Gersabeck²³, T Gershon³⁰, D Gerstel²⁵, Ph Ghez⁵⁴, S Gianì²⁰, V Gibson⁴², O G Girard²⁰, L Giubega⁵⁵, K Gizdov⁵³, V V Gligorov³⁸, D Golubkov³⁷, A Golutvin^{14

31}, A Gomes³⁴, I V Gorelov⁴⁰, C Gotti³⁶, E Govorkova¹, J P Grabowski²⁴, R Graciani Diaz¹², L A Granado Cardoso¹⁰, E Graugés¹², E Graverini², G Graziani¹⁹, A Grecu⁵⁵, R Greim¹, P Griffith²⁹, L Grillo²³, L Gruber¹⁰, B R Gruberg Cazon⁴⁵, O Grünberg⁶⁶, C Gu¹⁸, E Gushchin⁶³, Yu Guz^{26

10}, T Gys¹⁰, C Göbel⁶⁷, T Hadavizadeh⁴⁵, C Hadjivasiliou⁶, G Haefeli²⁰, C Haen¹⁰, S C Haines⁴², B Hamilton²², X Han²⁴, T H Hancock⁴⁵, S Hansmann-Menzemer²⁴, N Harnew⁴⁵, S T Harnew⁴, T Harrison⁴⁹, C Hasse¹⁰, M Hatch¹⁰, J He³⁵, M Hecker¹⁴, K Heinicke⁹, A Heister⁹, K Hennessy⁴⁹, L Henry⁶⁵, E van Herwijnen¹⁰, M Heß⁶⁶, A Hicheur¹⁵, R Hidalgo Charman²³, D Hill⁴⁵, M Hilton²³, P H Hopchev²⁰, W Hu⁶⁰, W Huang³⁵, Z C Huard⁷, W Hulsbergen¹, T Humair¹⁴, M Hushchyn²⁸, D Hutchcroft⁴⁹, D Hynds¹, P Ibis⁹, M Idzik⁵⁹, P Ilten⁴⁴, K Ivshin¹³, R Jacobsson¹⁰, J Jalocha⁴⁵, E Jans¹, A Jawahery²², F Jiang¹⁸, M John⁴⁵, D Johnson¹⁰, C R Jones⁴², C Joram¹⁰, B Jost¹⁰, N Jurik⁴⁵, S Kandybei⁶¹, M Karacson¹⁰, J M Kariuki⁴, S Karodia¹¹, N Kazeev²⁸, M Kecke²⁴, F Keizer⁴², M Kelsey²⁷, M Kenzie⁴², T Ketel⁶⁸, E Khairullin²⁸, B Khanji¹⁰, C Khurewathanakul²⁰, K E Kim²⁷, T Kirn³⁹, S Klaver⁸, K Klimaszewski³², T Klimkovich⁵⁸, S Koliiev⁶⁹, M Kolpin²⁴, R Kopecna²⁴, P Koppenburg¹, I Kostiuk¹, S Kotriakhova¹³, M Kozeiha⁶, L Kravchuk⁶³, M Kreps³⁰, F Kress¹⁴, P Krokovny⁴⁸, W Krupa⁵⁹, W Krzemien³², W Kucewicz⁴³, M Kucharczyk⁴³, V Kudryavtsev⁴⁸, A K Kuonen²⁰, T Kvaratskheliya^{37

10}, D Lacarrere¹⁰, G Lafferty²³, A Lai²⁹, D Lancierini², G Lanfranchi⁸, C Langenbruch³⁹, T Latham³⁰, C Lazzeroni⁴⁴, R Le Gac²⁵, A Leflat⁴⁰, J Lefrançois¹⁷, R Lefèvre⁶, F Lemaitre¹⁰, O Leroy²⁵, T Lesiak⁴³, B Leverington²⁴, P-R Li³⁵, T Li¹⁸, Z Li²⁷, X Liang²⁷, T Likhomanenko⁷⁰, R Lindner¹⁰, F Lionetto², V Lisovskyi¹⁷, X Liu¹⁸, D Loh³⁰, A Loi²⁹, I Longstaff¹¹, J H Lopes¹⁵, G H Lovell⁴², D Lucchesi¹⁶, M Lucio Martinez³, A Lupato¹⁶, E Luppi²¹, O Lupton¹⁰, A Lusiani³³, X Lyu³⁵, F Machefert¹⁷, F Maciuc⁵⁵, V Macko²⁰, P Mackowiak⁹, S Maddrell-Mander⁴, O Maev^{13

10}, K Maguire²³, D Maisuzenko¹³, M W Majewski⁵⁹, S Malde⁴⁵, B Malecki⁴³, A Malinin⁷⁰, T Maltsev⁴⁸, G Manca²⁹, G Mancinelli²⁵, D Marangotto⁶⁴, J Maratas⁶, J F Marchand⁵⁴, U Marconi⁴¹, C Marin Benito¹⁷, M Marinangeli²⁰, P Marino²⁰, J Marks²⁴, P J Marshall⁴⁹, G Martellotti⁴⁶, M Martin²⁵, M Martinelli¹⁰, D Martinez Santos³, F Martinez Vidal⁶⁵, A Massafferri³⁴, M Materok³⁹, R Matev¹⁰, A Mathad³⁰, Z Mathe¹⁰, C Matteuzzi³⁶, A Mauri², E Maurice¹⁷, B Maurin²⁰, A Mazurov⁴⁴, M McCann^{10

14}, A McNab²³, R McNulty⁷¹, J V Mead⁴⁹, B Meadows⁷, C Meaux²⁵, F Meier⁹, N Meinert⁶⁶, D Melnychuk³², M Merk¹, A Merli⁶⁴, E Michielin¹⁶, D A Milanes⁷², E Millard³⁰, M-N Minard⁵⁴, L Minzoni²¹, D S Mitzel²⁴, A Mogini³⁸, J Molina Rodriguez³⁴, T Mombächer⁹, I A Monroy⁷², S Monteil⁶, M Morandin¹⁶, G Morello⁸, M J Morello³³, O Morgunova⁷⁰, J Moron⁵⁹, A B Morris²⁵, R Mountain²⁷, F Muheim⁵³, M Mulder¹, C H Murphy⁴⁵, D Murray²³, A Mödden⁹, D Müller¹⁰, J Müller⁹, K Müller², V Müller⁹, P Naik⁴, T Nakada²⁰, R Nandakumar⁶², A Nandi⁴⁵, T Nanut²⁰, I Nasteva¹⁵, M Needham⁵³, N Neri⁶⁴, S Neubert²⁴, N Neufeld¹⁰, M Neuner²⁴, T D Nguyen²⁰, C Nguyen-Mau²⁰, S Nieswand³⁹, R Niet⁹, N Nikitin⁴⁰, A Nogay⁷⁰, N S Nolte¹⁰, D P O'Hanlon⁴¹, A Oblakowska-Mucha⁵⁹, V Obraztsov²⁶, S Ogilvy⁸, R Oldeman²⁹, C J G Onderwater⁷³, A Ossowska⁴³, J M Otalora Goicochea¹⁵, P Owen², A Oyanguren⁶⁵, P R Pais²⁰, T Pajero³³, A Palano⁵⁷, M Palutan^{8

10}, G Panshin⁷⁴, A Papanestis⁶², M Pappagallo⁵³, L L Pappalardo²¹, W Parker²², C Parkes²³, G Passaleva^{19

10}, A Pastore⁵⁷, M Patel¹⁴, C Patrignani⁴¹, A Pearce¹⁰, A Pellegrino¹, G Penso⁴⁶, M Pepe Altarelli¹⁰, S Perazzini¹⁰, D Pereima³⁷, P Perret⁶, L Pescatore²⁰, K Petridis⁴, A Petrolini⁵², A Petrov⁷⁰, S Petrucci⁵³, M Petruzzo⁶⁴, B Pietrzyk⁵⁴, G Pietrzyk²⁰, M Pikies⁴³, M Pili⁴⁵, D Pinci⁴⁶, J Pinzino¹⁰, F Pisani¹⁰, A Piucci²⁴, V Placinta⁵⁵, S Playfer⁵³, J Plews⁴⁴, M Plo Casasus³, F Polci³⁸, M Poli Lener⁸, A Poluektov³⁰, N Polukhina³¹, I Polyakov²⁷, E Polycarpo¹⁵, G J Pomery⁴, S Ponce¹⁰, A Popov²⁶, D Popov^{58

44}, S Poslavskii²⁶, C Potterat¹⁵, E Price⁴, J Prisciandaro³, C Prouve⁴, V Pugatch⁶⁹, A Puig Navarro², H Pullen⁴⁵, G Punzi³³, W Qian³⁵, J Qin³⁵, R Quagliani³⁸, B Quintana⁶, B Rachwal⁵⁹, J H Rademacker⁴, M Rama³³, M Ramos Pernas³, M S Rangel¹⁵, F Ratnikov²⁸, G Raven⁶⁸, M Ravonel Salzgeber¹⁰, M Reboud⁵⁴, F Redi²⁰, S Reichert⁹, A C Dos Reis³⁴, F Reiss³⁸, C Remon Alepuz⁶⁵, Z Ren¹⁸, V Renaudin¹⁷, S Ricciardi⁶², S Richards⁴, K Rinnert⁴⁹, P Robbe¹⁷, A Robert³⁸, A B Rodrigues²⁰, E Rodrigues⁷, J A Rodriguez Lopez⁷², M Roehrken¹⁰, S Roiser¹⁰, A Rollings⁴⁵, V Romanovskiy²⁶, A Romero Vidal³, M Rotondo⁸, M S Rudolph²⁷, T Ruf¹⁰, J Ruiz Vidal⁶⁵, J J Saborido Silva³, N Sagidova¹³, B Saitta²⁹, V Salustino Guimaraes⁶⁷, C Sanchez Gras¹, C Sanchez Mayordomo⁶⁵, B Sanmartin Sedes³, R Santacesaria⁴⁶, C Santamarina Rios³, M Santimaria⁸, E Santovetti⁵¹, G Sarpis²³, A Sarti⁸, C Satriano⁴⁶, A Satta⁵¹, M Saur³⁵, D Savrina^{37

40}, S Schael³⁹, M Schellenberg⁹, M Schiller¹¹, H Schindler¹⁰, M Schmelling⁵⁸, T Schmelzer⁹, B Schmidt¹⁰, O Schneider²⁰, A Schopper¹⁰, H F Schreiner⁷, M Schubiger²⁰, M H Schune¹⁷, R Schwemmer¹⁰, B Sciascia⁸, A Sciubba⁴⁶, A Semennikov³⁷, E S Sepulveda³⁸, A Sergi^{10

44}, N Serra², J Serrano²⁵, L Sestini¹⁶, A Seuthe⁹, P Seyfert¹⁰, M Shapkin²⁶, Y Shcheglov¹³, T Shears⁴⁹, L Shekhtman⁴⁸, V Shevchenko⁷⁰, E Shmanin³¹, B G Siddi²¹, R Silva Coutinho², L Silva de Oliveira¹⁵, G Simi¹⁶, S Simone⁵⁷, N Skidmore²⁴, T Skwarnicki²⁷, M W Slater⁴⁴, J G Smeaton⁴², E Smith³⁹, I T Smith⁵³, M Smith¹⁴, M Soares⁴¹, L Soares Lavra³⁴, M D Sokoloff⁷, F J P Soler¹¹, B Souza De Paula¹⁵, B Spaan⁹, E Spadaro Norella⁶⁴, P Spradlin¹¹, F Stagni¹⁰, M Stahl²⁴, S Stahl¹⁰, P Stefko²⁰, S Stefkova¹⁴, O Steinkamp², S Stemmle²⁴, O Stenyakin²⁶, M Stepanova¹³, H Stevens⁹, A Stocchi¹⁷, S Stone²⁷, B Storaci², S Stracka³³, M E Stramaglia²⁰, M Straticiuc⁵⁵, U Straumann², S Strokov⁷⁴, J Sun¹⁸, L Sun⁵⁰, K Swientek⁵⁹, T Szumlak⁵⁹, M Szymanski³⁵, S T'Jampens⁵⁴, Z Tang¹⁸, A Tayduganov²⁵, T Tekampe⁹, G Tellarini²¹, F Teubert¹⁰, E Thomas¹⁰, J van Tilburg¹, M J Tilley¹⁴, V Tisserand⁶, M Tobin⁵⁹, S Tolk¹⁰, L Tomassetti²¹, D Tonelli³³, D Y Tou³⁸, R Tourinho Jadallah Aoude³⁴, E Tournefier⁵⁴, M Traill¹¹, M T Tran²⁰, A Trisovic⁴², A Tsaregorodtsev²⁵, G Tuci³³, A Tully⁴², N Tuning^{1

10}, A Ukleja³², A Usachov¹⁷, A Ustyuzhanin²⁸, U Uwer²⁴, A Vagner⁷⁴, V Vagnoni⁴¹, A Valassi¹⁰, S Valat¹⁰, G Valenti⁴¹, R Vazquez Gomez¹⁰, P Vazquez Regueiro³, S Vecchi²¹, M van Veghel¹, J J Velthuis⁴, M Veltri¹⁹, G Veneziano⁴⁵, A Venkateswaran²⁷, T A Verlage³⁹, M Vernet⁶, M Veronesi¹, N V Veronika⁷¹, M Vesterinen⁴⁵, J V Viana Barbosa¹⁰, D Vieira³⁵, M Vieites Diaz³, H Viemann⁶⁶, X Vilasis-Cardona¹², A Vitkovskiy¹, M Vitti⁴², V Volkov⁴⁰, A Vollhardt², D Vom Bruch³⁸, B Voneki¹⁰, A Vorobyev¹³, V Vorobyev⁴⁸, J A de Vries¹, C Vázquez Sierra¹, R Waldi⁶⁶, J Walsh³³, J Wang²⁷, M Wang¹⁸, Y Wang⁶⁰, Z Wang², D R Ward⁴², H M Wark⁴⁹, N K Watson⁴⁴, D Websdale¹⁴, A Weiden², C Weisser⁴⁷, M Whitehead³⁹, J Wicht³⁰, G Wilkinson⁴⁵, M Wilkinson²⁷, I Williams⁴², M R J Williams²³, M Williams⁴⁷, T Williams⁴⁴, F F Wilson^{10

62}, J Wimberley²², M Winn¹⁷, J Wishahi⁹, W Wislicki³², M Witek⁴³, G Wormser¹⁷, S A Wotton⁴², K Wyllie¹⁰, D Xiao⁶⁰, Y Xie⁶⁰, A Xu¹⁸, M Xu⁶⁰, Q Xu³⁵, Z Xu¹⁸, Z Xu⁵⁴, Z Yang¹⁸, Z Yang²², Y Yao²⁷, L E Yeomans⁴⁹, H Yin⁶⁰, J Yu⁶⁰, X Yuan²⁷, O Yushchenko²⁶, K A Zarebski⁴⁴, M Zavertyaev⁵⁸, D Zhang⁶⁰, L Zhang¹⁸, W C Zhang¹⁸, Y Zhang¹⁷, A Zhelezov²⁴, Y Zheng³⁵, X Zhu¹⁸, V Zhukov^{39

40}, J B Zonneveld⁵³, S Zucchelli⁴¹

Affiliations

¹ 27Nikhef National Institute for Subatomic Physics, Amsterdam, The Netherlands.
² 44Physik-Institut, Universität Zürich, Zurich, Switzerland.
³ 41Instituto Galego de Física de Altas Enerxías (IGFAE), Universidade de Santiago de Compostela, Santiago de Compostela, Spain.
⁴ 48H.H. Wills Physics Laboratory, University of Bristol, Bristol, UK.
⁵ 73University of Michigan, Ann Arbor, USA.
⁶ 5Clermont Université, Université Blaise Pascal, CNRS/IN2P3, LPC, Clermont-Ferrand, France.
⁷ 59University of Cincinnati, Cincinnati, OH USA.
⁸ 18INFN Laboratori Nazionali di Frascati, Frascati, Italy.
⁹ 10Fakultät Physik, Technische Universität Dortmund, Dortmund, Germany.
¹⁰ 42European Organization for Nuclear Research (CERN), Geneva, Switzerland.
¹¹ 53School of Physics and Astronomy, University of Glasgow, Glasgow, UK.
¹² 40ICCUB, Universitat de Barcelona, Barcelona, Spain.
¹³ 33Petersburg Nuclear Physics Institute (PNPI), Gatchina, Russia.
¹⁴ 55Imperial College London, London, UK.
¹⁵ 2Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil.
¹⁶ 23INFN Sezione di Padova, Padua, Italy.
¹⁷ 7LAL, Univ. Paris-Sud, CNRS/IN2P3, Université Paris-Saclay, Orsay, France.
¹⁸ 3Center for High Energy Physics, Tsinghua University, Beijing, China.
¹⁹ 17INFN Sezione di Firenze, Florence, Italy.
²⁰ 43Institute of Physics, Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland.
²¹ 16INFN Sezione di Ferrara, Ferrara, Italy.
²² 60University of Maryland, College Park, MD USA.
²³ 56School of Physics and Astronomy, University of Manchester, Manchester, UK.
²⁴ 12Physikalisches Institut, Ruprecht-Karls-Universität Heidelberg, Heidelberg, Germany.
²⁵ 6Aix-Marseille Univ, CNRS/IN2P3, CPPM, Marseille, France.
²⁶ 39Institute for High Energy Physics (IHEP), Protvino, Russia.
²⁷ 61Syracuse University, Syracuse, NY USA.
²⁸ Yandex School of Data Analysis, Moscow, Russia.
²⁹ 22INFN Sezione di Cagliari, Monserrato, Italy.
³⁰ 50Department of Physics, University of Warwick, Coventry, UK.
³¹ 70National University of Science and Technology "MISIS", Moscow, Russia.
³² 31National Center for Nuclear Research (NCBJ), Warsaw, Poland.
³³ 24INFN Sezione di Pisa, Pisa, Italy.
³⁴ 1Centro Brasileiro de Pesquisas Físicas (CBPF), Rio de Janeiro, Brazil.
³⁵ 63University of Chinese Academy of Sciences, Beijing, China.
³⁶ 20INFN, Sezione di Milano-Bicocca, Milan, Italy.
³⁷ 34Institute of Theoretical and Experimental Physics (ITEP), Moscow, Russia.
³⁸ LPNHE, Sorbonne Université, Paris Diderot, Sorbonne Paris Cité, CNRS/IN2P3, Paris, France.
³⁹ 9I. Physikalisches Institut, RWTH Aachen University, Aachen, Germany.
⁴⁰ 35Institute of Nuclear Physics, Moscow State University (SINP MSU), Moscow, Russia.
⁴¹ 15INFN Sezione di Bologna, Bologna, Italy.
⁴² 49Cavendish Laboratory, University of Cambridge, Cambridge, UK.
⁴³ 29Henryk Niewodniczanski Institute of Nuclear Physics Polish Academy of Sciences, Kraków, Poland.
⁴⁴ 47University of Birmingham, Birmingham, UK.
⁴⁵ 57Department of Physics, University of Oxford, Oxford, UK.
⁴⁶ 26INFN Sezione di Roma La Sapienza, Rome, Italy.
⁴⁷ 58Massachusetts Institute of Technology, Cambridge, MA USA.
⁴⁸ 38Budker Institute of Nuclear Physics (SB RAS), Novosibirsk, Russia.
⁴⁹ 54Oliver Lodge Laboratory, University of Liverpool, Liverpool, UK.
⁵⁰ 64School of Physics and Technology, Wuhan University, Wuhan, China.
⁵¹ 25INFN Sezione di Roma Tor Vergata, Rome, Italy.
⁵² 19INFN Sezione di Genova, Genoa, Italy.
⁵³ 52School of Physics and Astronomy, University of Edinburgh, Edinburgh, UK.
⁵⁴ Univ. Grenoble Alpes, Univ. Savoie Mont-Blanc, CNRS/IN2P3-LAPP, Annecy, France.
⁵⁵ 32Horia Hulubei National Institute of Physics and Nuclear Engineering, Bucharest-Magurele, Romania.
⁵⁶ 74Los Alamos National Laboratory (LANL), Los Alamos, USA.
⁵⁷ 14INFN Sezione di Bari, Bari, Italy.
⁵⁸ 11Max-Planck-Institut für Kernphysik (MPIK), Heidelberg, Germany.
⁵⁹ 30Faculty of Physics and Applied Computer Science, AGH-University of Science and Technology, Kraków, Poland.
⁶⁰ 65Institute of Particle Physics, Central China Normal University, Wuhan, Hubei China.
⁶¹ 45NSC Kharkiv Institute of Physics and Technology (NSC KIPT), Kharkiv, Ukraine.
⁶² 51STFC Rutherford Appleton Laboratory, Didcot, UK.
⁶³ 36Institute for Nuclear Research of the Russian Academy of Sciences (INR RAS), Moscow, Russia.
⁶⁴ 21INFN Sezione di Milano, Milan, Italy.
⁶⁵ 72Instituto de Fisica Corpuscular, Centro Mixto Universidad de Valencia-CSIC, Valencia, Spain.
⁶⁶ 67Institut für Physik, Universität Rostock, Rostock, Germany.
⁶⁷ 62Pontifícia Universidade Católica do Rio de Janeiro (PUC-Rio), Rio de Janeiro, Brazil.
⁶⁸ 28Nikhef National Institute for Subatomic Physics and VU University Amsterdam, Amsterdam, The Netherlands.
⁶⁹ 46Institute for Nuclear Research of the National Academy of Sciences (KINR), Kyiv, Ukraine.
⁷⁰ 69National Research Centre Kurchatov Institute, Moscow, Russia.
⁷¹ 13School of Physics, University College Dublin, Dublin, Ireland.
⁷² 66Departamento de Fisica, Universidad Nacional de Colombia, Bogotá, Colombia.
⁷³ 68Van Swinderen Institute, University of Groningen, Groningen, The Netherlands.
⁷⁴ 71National Research Tomsk Polytechnic University, Tomsk, Russia.

Abstract

A search is presented for a Higgs-like boson with mass in the range 45 to 195 $GeV / c^{2}$ decaying into a muon and a tau lepton. The dataset consists of proton-proton interactions at a centre-of-mass energy of 8 $TeV$ , collected by the LHCb experiment, corresponding to an integrated luminosity of 2 $fb^{- 1}$ . The tau leptons are reconstructed in both leptonic and hadronic decay channels. An upper limit on the production cross-section multiplied by the branching fraction at 95% confidence level is set and ranges from 22 $pb$ for a boson mass of 45 $GeV / c^{2}$ to 4 $pb$ for a mass of 195 $GeV / c^{2}$ .