Details

Autor(en) / Beteiligte

• Ali, S
• Andreotti, M
• Back, J J
• Barter, W
• Bel, L J
• Belloli, N
• Belyaev, I
• Bertholet, E
• Betti, F
• Bezshyiko, Ia
• Bjørn, M
• Borghi, S
• Bowen, E
• Byczynski, W
• Camboni, A
• Cenci, R
• Closier, J
• Cogneras, E
• Da Cunha Marinho, F
• Dall'Occo, E
• De Capua, S
• De Miranda, J M
• De Paula, L
• Del Buono, L
• Dijkstra, H
• Easo, S
• Eidelman, S
• Fu, J
• Gallas Torreira, A
• Gambetta, S
• Gandini, P
• Garcia Martin, L M
• Grecu, A
• Göbel, C
• Heinicke, K
• Henrard, P
• Jones, C R
• Klimkovich, T
• Kucharczyk, M
• Kuonen, A K
• Kvaratskheliya, T
• Lacarrere, D
• Langenbruch, C
• Latham, T
• Li, Y
• Li, Z
• Lindner, R
• Luppi, E
• Lupton, O
• Maciuc, F
• Macko, V
• Mackowiak, P
• Majewski, M W
• Marconi, U
• Melnychuk, D
• Merk, M
• Morandin, M
• Moron, J
• Müller, D
• Müller, J
• Nasteva, I
• Ossowska, A
• Otalora Goicochea, J M
• Oyanguren, A
• Parker, W
• Pellegrino, A
• Penso, G
• Polyakov, I
• Popov, D
• Potterat, C
• Pullen, H
• Quagliani, R
• Rachwal, B
• Rives Molina, V
• Robbe, P
• Romero Vidal, A
• Ronayne, J W
• Santamarina Rios, C
• Schellenberg, M
• Schiller, M
• Schopper, A
• Sestini, L
• Shears, T
• Smith, I T
• Stefkova, S
• Stone, S
• Thomas, E
• Tourinho Jadallah Aoude, R
• Tully, A
• Ukleja, A
• Usachov, A
• Vilasis-Cardona, X
• Wallace, C
• Walsh, J
• Watson, N K
• Whitehead, M
• Williams, M P
• Wraight, K
• Xu, M
• Zhang, Y

Titel

Measurement of the Ratio of Branching Fractions B(B_{c}^{+}→J/ψτ^{+}ν_{τ})/B(B_{c}^{+}→J/ψμ^{+}ν_{μ})

Ist Teil von

• Physical review letters, 2018-03, Vol.120 (12), p.121801-121801, Article 121801

Ort / Verlag

United States: American Physical Society

Erscheinungsjahr

2018

Link zum Volltext

Quelle

PROLA - Physical Review Online Archive

Beschreibungen/Notizen

• A measurement is reported of the ratio of branching fractions R(J/ψ)=B(B_{c}^{+}→J/ψτ^{+}ν_{τ})/B(B_{c}^{+}→J/ψμ^{+}ν_{μ}), where the τ^{+} lepton is identified in the decay mode τ^{+}→μ^{+}ν_{μ}ν[over ¯]_{τ}. This analysis uses a sample of proton-proton collision data corresponding to 3.0  fb^{-1} of integrated luminosity recorded with the LHCb experiment at center-of-mass energies of 7 and 8 TeV. A signal is found for the decay B_{c}^{+}→J/ψτ^{+}ν_{τ} at a significance of 3 standard deviations corrected for systematic uncertainty, and the ratio of the branching fractions is measured to be R(J/ψ)=0.71±0.17(stat)±0.18(syst). This result lies within 2 standard deviations above the range of central values currently predicted by the standard model.