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I.Serra N.Serrano J.Sestini L.Seyfert P.Shapkin M.Shapoval I.Shcheglov Y.Shears T.Shekhtman L.Shevchenko V.Shires A.Silva Coutinho R.Simi G.Sirendi M.Skidmore N.Skwarnicki T.Smith N.A.Smith E.Smith E.Smith J.Smith M.Snoek H.Sokoloff M.D.Soler F.J.P.Soomro F.Souza D.Souza De Paula B.Spaan B.Sparkes A.Spradlin P.Sridharan S.Stagni F.Stahl M.Stahl S.Steinkamp O.Stenyakin O.Stevenson S.Stoica S.Stone S.Storaci B.Stracka S.Straticiuc M.Straumann U.Stroili R.Subbiah V.K.Sun L.Sutcliffe W.Swientek K.Swientek S.Syropoulos V.Szczekowski M.Szczypka P.Szilard D.Szumlak T.T’Jampens S.Teklishyn M.Tellarini G.Teubert F.Thomas C.Thomas E.van Tilburg J.Tisserand V.Tobin M.Tolk S.Tomassetti L.Tonelli D.Topp-Joergensen S.Torr N.Tournefier E.Tourneur S.Tran M.T.Tresch M.Tsaregorodtsev A.Tsopelas P.Tuning N.Ubeda Garcia M.Ukleja A.Ustyuzhanin A.Uwer U.Vagnoni V.Valenti G.Vallier A.Vazquez Gomez R.Vazquez Regueiro P.Vázquez Sierra C.Vecchi S.Velthuis J.J.Veltri M.Veneziano G.Vesterinen M.Viaud B.Vieira D.Vieites Diaz M.Vilasis-Cardona X.Vollhardt A.Volyanskyy D.Voong D.Vorobyev A.Vorobyev V.Voß C.Voss H.de Vries J.A.Waldi R.Wallace C.Wallace R.Walsh J.Wandernoth S.Wang J.Ward D.R.Watson N.K.Websdale D.Whitehead M.Wicht J.Wiedner D.Wilkinson G.Williams M.P.Williams M.Wilson F.F.Wimberley J.Wishahi J.Wislicki W.Witek M.Wormser G.Wotton S.A.Wright S.Wu S.Wyllie K.Xie Y.Xing Z.Xu Z.Yang Z.Yuan X.Yushchenko O.Zangoli M.Zavertyaev M.Zhang L.Zhang W.C.Zhang Y.Zhelezov A.Zhokhov A.Zhong L.Zvyagin A.2024-07-222024-07-22201410298479http://akademikarsiv.cbu.edu.tr:4000/handle/123456789/16703First observations of the rare decays B+→ K+π+π-μ+μ-and B+→ φK+μ+μ-are presented using data corresponding to an integrated luminosity of 3.0 fb-1, collected by the LHCb experiment at centre-of-mass energies of 7 and 8TeV. The branching fractions of the decays are (Formula Presented.) where the uncertainties are statistical, systematic, and due to the uncertainty on the branching fractions of the normalisation modes. A measurement of the differential branching fraction in bins of the invariant mass squared of the dimuon system is also presented for the decay B+→ K+π+π-μ+μ-. © CERN.EnglishAll Open Access; Gold Open AccessArticle10.1007/JHEP10(2014)064