Time-dependent CPviolation is measured in the B0→J/Ψπ+π-channel for each π+π-resonant final state using data collected with an integrated luminosity of 3.0fb-1in ppcollisions using the LHCb detector. The final state with the largest rate, J/Ψρ0(770), is used to measure the CP-violating angle 2βeffto be (41.7 ±9.6+2.8-6.3)°. This result can be used to limit the size of penguin amplitude contributions to CPviolation measurements in, for example, B0s→J/Ψϕdecays. Assuming approximate SU(3) flavour symmetry and neglecting higher order diagrams, the shift in the CP-violating phase ϕsis limited to be within the interval [-1.05°, +1.18°] at 95% confidence level. Changes to the limit due to SU(3) symmetry breaking effects are also discussed.

Aaij, R., Adeva, B., Adinolfi, M., Affolder, A., Ajaltouni, Z., Akar, S., et al. (2015). Measurement of the CP-violating phase βin B0→J/Ψπ+π-decays and limits on penguin effects. PHYSICS LETTERS. SECTION B, 742(1), 38-49 [10.1016/j.physletb.2015.01.008].

Measurement of the CP-violating phase βin B0→J/Ψπ+π-decays and limits on penguin effects

CALVI, MARTA;CASSINA, LORENZO;GOTTI, CLAUDIO;KHANJI, BASEM;Martinelli, M;MATTEUZZI, CLARA;
2015

Abstract

Time-dependent CPviolation is measured in the B0→J/Ψπ+π-channel for each π+π-resonant final state using data collected with an integrated luminosity of 3.0fb-1in ppcollisions using the LHCb detector. The final state with the largest rate, J/Ψρ0(770), is used to measure the CP-violating angle 2βeffto be (41.7 ±9.6+2.8-6.3)°. This result can be used to limit the size of penguin amplitude contributions to CPviolation measurements in, for example, B0s→J/Ψϕdecays. Assuming approximate SU(3) flavour symmetry and neglecting higher order diagrams, the shift in the CP-violating phase ϕsis limited to be within the interval [-1.05°, +1.18°] at 95% confidence level. Changes to the limit due to SU(3) symmetry breaking effects are also discussed.
Articolo in rivista - Articolo scientifico
Nuclear and High Energy Physics
English
38
49
12
Aaij, R., Adeva, B., Adinolfi, M., Affolder, A., Ajaltouni, Z., Akar, S., et al. (2015). Measurement of the CP-violating phase βin B0→J/Ψπ+π-decays and limits on penguin effects. PHYSICS LETTERS. SECTION B, 742(1), 38-49 [10.1016/j.physletb.2015.01.008].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/154263
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