Details

Autor(en) / Beteiligte

• Ali, S
• Alves, A A
• Artamonov, A
• Auriemma, G
• Beddow, J
• Bedeschi, F
• Bediaga, I
• Bellee, V
• Bien, A
• Blusk, S
• Britsch, M
• Cadeddu, S
• Cavallero, G
• Cliff, H V
• Cogoni, V
• Decamp, D
• Dey, B
• Donleavy, S
• Dujany, G
• Egede, U
• Egorychev, V
• Eitschberger, U
• Farinelli, C
• Farry, S
• Ferro-Luzzi, M
• Fontana, M
• Frei, C
• Gallas Torreira, A
• Gambetta, S
• Gandini, P
• García Pardiñas, J
• Gavardi, L
• Gazzoni, G
• Gianì, S
• Gotti, C
• Greening, E
• Griffith, P
• Grillo, L
• Hadjivasiliou, C
• Haen, C
• He, J
• Hynds, D
• Jalocha, J
• Jing, F
• John, M
• Kanso, W
• Karodia, S
• Klaver, S
• Klimaszewski, K
• Kolpin, M
• Koopman, R F
• Kreplin, K
• Krocker, G
• Kucharczyk, M
• Kudryavtsev, V
• Le Gac, R
• Li, Y
• Lupton, O
• Machefert, F
• Maev, O
• Maguire, K
• Malde, S
• McNulty, R
• Meissner, M
• Mordà, A
• Nandakumar, R
• Niet, R
• Oblakowska-Mucha, A
• Oldeman, R
• Onderwater, C J G
• Palombo, F
• Pellegrino, A
• Pescatore, L
• Potterat, C
• Price, J D
• Ronayne, J W
• Santimaria, M
• Schneider, O
• Sciascia, B
• Sciubba, A
• Shekhtman, L
• Skillicorn, I
• Steinkamp, O
• Sun, L
• Szczekowski, M
• Thomas, E
• Todd, J
• Tourneur, S
• Tran, M T
• Trisovic, A
• Vázquez Sierra, C
• Vieira, D
• Volyanskyy, D
• Vorobyev, V
• Williams, M
• Wimberley, J
• Wislicki, W
• Yu, J
• Zhang, L
• Zhelezov, A

Titel

Measurement of the ratio of branching fractions B(B[over ¯]^{0}→D^{+}τ^{-}ν[over ¯]_{τ})/B(B[over ¯]^{0}→D^{+}μ^{-}ν[over ¯]_{μ})

Ist Teil von

• Physical review letters, 2015-09, Vol.115 (11), p.111803-111803, Article 111803

Ort / Verlag

United States: American Physical Society

Erscheinungsjahr

2015

Link zum Volltext

Quelle

APS_美国物理学会过刊

Beschreibungen/Notizen

• The branching fraction ratio R(D^{*})≡B(B[over ¯]^{0}→D^{*+}τ^{-}ν[over ¯]_{τ})/B(B[over ¯]^{0}→D^{*+}μ^{-}ν[over ¯]_{μ}) is measured using a sample of proton-proton collision data corresponding to 3.0  fb^{-1} of integrated luminosity recorded by the LHCb experiment during 2011 and 2012. The tau lepton is identified in the decay mode τ^{-}→μ^{-}ν[over ¯]_{μ}ν_{τ}. The semitauonic decay is sensitive to contributions from non-standard-model particles that preferentially couple to the third generation of fermions, in particular, Higgs-like charged scalars. A multidimensional fit to kinematic distributions of the candidate B[over ¯]^{0} decays gives R(D^{*})=0.336±0.027(stat)±0.030(syst). This result, which is the first measurement of this quantity at a hadron collider, is 2.1 standard deviations larger than the value expected from lepton universality in the standard model.