Search for the rare decays and at LHCb

Lhcb Collaboration Lhcb Collaboration,R Aaij,F Abudinén,T Ackernley,B Adeva,M Adinolfi,P Adlarson,H Afsharnia,C Agapopoulou,Z Ajaltouni,S Akar,J Albrecht,F Alessio,M Alexander,A Alfonso Albero,Z Aliouche,P Alvarez Cartelle,S Amato,Y Amhis,L An,L Anderlini,M Andersson,A Andreianov,M Andreotti,D Andreou,D Ao,F Archilli,A Artamonov,M Artuso,E Aslanides,M Atzeni,B Audurier,S Bachmann,M Bachmayer,A Bailly-Reyre,V Balagura,W Baldini,J Baptista De Souza Leite,S Barsuk,W Barter,M Bartolini,F Baryshnikov,G Bassi,B Batsukh,A Battig,A Bay,A Beck,M Becker,F Bedeschi,A Beiter,V Belavin,S Belin,K Belous,I Belyaev,G Benane,G Bencivenni,E Ben-Haim,A Berezhnoy,R Bernet,S Bernet Andres,D Berninghoff,C Bertella,A Bertolin,C Betancourt,F Betti,Ia Bezshyiko,S Bhasin,J Bhom,L Bian,S Bifani,P Billoir,A Bitadze,A Bizzeti,T Blake,F Blanc,S Blusk,D Bobulska,T Boettcher,R Bolzonella,N Bondar,F Borgato,S Borghi,M Borsato,A Boyer,C Bozzi,S Braun,J Brodzicka,A Brossa Gonzalo,J Brown,D Brundu,A Buonaura,C Burr,A Bursche,A Butkevich,J Buytaert,W Byczynski,S Cadeddu,H Cai,R Calabrese,S Cali,R Calladine,M Calvi,M Calvo Gomez,P Campana,S Capelli,L Capriotti,A Carbone,G Carboni,R Cardinale,A Cardini,P Carniti,A Casais Vidal,G Casse,M Cattaneo,G Cavallero,V Cavallini,S Celani,J Cerasoli,M Charles,Ph Charpentier,M Chefdeville,C Chen,S Chen,A Chernov,S Chernyshenko,V Chobanova,S Cholak,A Chubykin,V Chulikov,P Ciambrone,X Cid Vidal,G Ciezarek,G Ciullo,M Clemencic,J Closier,V Coco,J Cogan,E Cogneras,L Cojocariu,P Collins,T Colombo,L Congedo,A Contu,N Cooke,G Corti,B Couturier,M Cruz Torres,R Currie,C.L Da Silva,L Dai,J Dalseno,J Daniel,A Danilina,A Davis,J De Boer,K De Bruyn,S De Capua,M De Cian,U De Freitas Carneiro Da Graca,E De Lucia,L De Paula,M De Serio,D De Simone,P De Simone,L Del Buono,B Delaney,H.-P Dembinski,V Denysenko,O Deschamps,F Dettori,B Dey,P Di Nezza,I Diachkov,S Didenko,L Dieste Maronas,S Ding,V Dobishuk,A Dolmatov,C Dong,F Dordei,L Douglas,L Dufour,V Duk,P Durante,D Dutta,A Dziurda,A 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,E Dall’occo ,A Terentev ,Matteo Barbetti ,D J D Thompson ,A Brea Rodríguez ,A G Downes ,P M Hamilton ,S Sheng ,M Zdybał ,H C Bernstein ,I Gorelov ,B D C Westhenry ,L L Gerken ,S Dadabaev ,J D Roth ,F C Volle ,M D Tat ,H Tilquin ,M Szymański ,C A Aidala ,I Shchemerov ,F A Garcia Rosales ,Ö Özçelik ,L A Granado Cardoso ,L L Pappalardo ,C T Dean ,D Décamp ,D Martínez Santos ,Dongqing Yang ,A Kupść ,J G Smeaton ,Hao Long ,I A Monroy ,N V Raab ,D Červenkov ,S C Haines ,A J Chadwick ,G H Lovell ,M Féo ,D J Unverzagt ,M D Sokoloff ,J T Borsuk ,M W Dudek ,Alejandra Marcela Ricci ,V Maćko ,R A Ruiz Fernandez ,J P Fernández ,X Tong ,L E Yeomans ,V Zhovkovska ,A Grecu ,A Gilman ,Niall Thomas Mchugh ,V Yeroshenko,H Yeung,H Yin,J Yu,X Yuan,E Zaffaroni,M Zavertyaev,O Zenaiev,M Zeng,C Zhang,D Zhang,L Zhang,S Zhang,Y Zhang,G Zunica ,A Zhelezov,Y Zheng,X Zhou,Y Zhou,X Zhu,Q Zou,S Zucchelli

doi:10.1088/1674-1137/aceae9

Abstract

A search for the rare decays and is performed using proton-proton collision data collected by the LHCb experiment at a centre-of-mass energy of 13, corresponding to an integrated luminosity of 2.0. No significant signal is observed for either decay mode and upper limits on their branching fractions are set using and decays as normalization channels. The upper limits are and at 95% confidence level for the and decay modes, respectively. This is the first reported search for the decay, while the upper limit on the branching fraction improves upon the previous best limit.

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