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Author (up) LHCb Collaboration (Aaij, R. et al); Fernandez Casani, A.; Jaimes Elles, S.J.; Libralon, S.; Lucio Martinez, M.; Martinez-Vidal, F.; Mazorra de Cos, J.; Oyanguren, A.; Rebollo De Miguel, M.; Sanderswood, I.; Svintozelskyi, V.; Velilla Serna, J.; Zhuo, J. url  doi
openurl 
  Title Search for the Lepton-Flavor Violating Decays B+ → π+ μ± e∓ Type Journal Article
  Year 2026 Publication Physical Review Letters Abbreviated Journal Phys. Rev. Lett.  
  Volume 137 Issue 6 Pages 061802 - 13pp  
  Keywords  
  Abstract The first search for the lepton-flavor violating decays B+ -> pi(+) mu(+/-) e(-/+) in proton-proton collisions is presented, using data collected by the LHCb experiment between 2011 and 2018, corresponding to an integrated luminosity of 9 fb(-1). No significant signal is observed and an upper limit on the branching fraction is set at B(B+ -> pi(+) mu(+/-) e(-/+)) < 1.8 x 10(-9) at the 90% confidence level, 2 orders of magnitude more restrictive than the most stringent upper limit to date. This is the first constraint on lepton-flavor violating b -> d quark transitions at the LHC and also sets the most stringent upper limits to date on b -> d mu(+/-)e(-/+) transitions. Limits on left-handed and scalar scenarios beyond the standard model are also reported.  
  Address [Bonacci, R. B.; Chizhik, G.; Dekkers, S.; Egede, U.; Hadavizadeh, T.; Harris, T. H.; Henderson, R. D. L.; Jelavic, A.; Lane, J. J.; Li, W.; Liu, F. L.; Lobo, I.; Song, R.; Walton, E. J.] Monash Univ, Sch Phys & Astron, Melbourne, Vic, Australia  
  Corporate Author Thesis  
  Publisher Amer Physical Soc Place of Publication Editor  
  Language English Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0031-9007 ISBN Medium  
  Area Expedition Conference  
  Notes WOS:001847664700001 Approved no  
  Is ISI yes International Collaboration yes  
  Call Number IFIC @ pastor @ Serial 7459  
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