Measurement of the ratio of branching fractions and difference in CP asymmetries of the decays B + → J/ψπ + and B + → J/ψK +

R. Aaij; B. Adeva; M. Adinolfi; Z. Ajaltouni; S. Akar; J. Albrecht; F. Alessio; L. Dufour; M Mulder; C. J. G. Onderwater; A. Pellegrino; S. Tolk; M.  van Veghel; LHCb Collaboration

doi:10.1007/JHEP03(2017)036

Measurement of the ratio of branching fractions and difference in CP asymmetries of the decays B ⁺ → J/ψπ ⁺ and B ⁺ → J/ψK ⁺

R. Aaij, B. Adeva, M. Adinolfi, Z. Ajaltouni, S. Akar, J. Albrecht, F. Alessio, L. Dufour, M Mulder, C. J. G. Onderwater, A. Pellegrino, S. Tolk, M. van Veghel, LHCb Collaboration

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Abstract

The ratio of branching fractions and the difference in CP asymmetries of the decays B+ -> J/psi pi(+) and B+ -> J/psi K+ are measured using a data sample of pp collisions collected by the LHCb experiment, corresponding to an integrated luminosity of 3 fb(-1) at centre -of -mass energies of 7 and 8 TeV. The results are B(B+ -> J/psi pi(+))/B(B+ -> J/psi K+) = (3.83 +/- 0.03 +/- 0.03) x 10(-2), A(CP)(B+ -> J/psi pi(+)) - A(CP)(B+ -> J/psi K+) = (1.82 +/- 0.86 +/- 0.14) x 10(-2), where the first uncertainties are statistical and the second are systematic. Combining this result with a recent LHCb measurement of A(CP)(B+ -> J/psi K+) provides the most precise estimate to date of CP violation in the decay B+ -> J/psi pi(+) A(CP)(B+ -> J/psi pi(+)) = (1.91 +/- 0.89 +/- 0.16) x 10(-2).

Original language	English
Article number	036
Number of pages	18
Journal	Journal of High Energy Physics
Volume	2017
Issue number	3
DOIs	https://doi.org/10.1007/JHEP03(2017)036
Publication status	Published - 7-Mar-2017

Keywords

Hadron-Hadron scattering (experiments)
CP violation
B physics
Branching fraction

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Aaij, R., Adeva, B., Adinolfi, M., Ajaltouni, Z., Akar, S., Albrecht, J., Alessio, F., Dufour, L., Mulder, M., Onderwater, C. J. G., Pellegrino, A., Tolk, S., van Veghel, M., & LHCb Collaboration (2017). Measurement of the ratio of branching fractions and difference in CP asymmetries of the decays B ⁺ → J/ψπ ⁺ and B ⁺ → J/ψK ⁺. Journal of High Energy Physics, 2017(3), Article 036. https://doi.org/10.1007/JHEP03(2017)036

@article{0e3beb745ca947b5a44045f9b6120b1e,

title = "Measurement of the ratio of branching fractions and difference in CP asymmetries of the decays B + → J/ψπ + and B + → J/ψK +",

abstract = "The ratio of branching fractions and the difference in CP asymmetries of the decays B+ -> J/psi pi(+) and B+ -> J/psi K+ are measured using a data sample of pp collisions collected by the LHCb experiment, corresponding to an integrated luminosity of 3 fb(-1) at centre -of -mass energies of 7 and 8 TeV. The results are B(B+ -> J/psi pi(+))/B(B+ -> J/psi K+) = (3.83 +/- 0.03 +/- 0.03) x 10(-2), A(CP)(B+ -> J/psi pi(+)) - A(CP)(B+ -> J/psi K+) = (1.82 +/- 0.86 +/- 0.14) x 10(-2), where the first uncertainties are statistical and the second are systematic. Combining this result with a recent LHCb measurement of A(CP)(B+ -> J/psi K+) provides the most precise estimate to date of CP violation in the decay B+ -> J/psi pi(+) A(CP)(B+ -> J/psi pi(+)) = (1.91 +/- 0.89 +/- 0.16) x 10(-2).",

keywords = "Hadron-Hadron scattering (experiments), CP violation, B physics, Branching fraction",

author = "R. Aaij and B. Adeva and M. Adinolfi and Z. Ajaltouni and S. Akar and J. Albrecht and F. Alessio and L. Dufour and M Mulder and Onderwater, {C. J. G.} and A. Pellegrino and S. Tolk and {van Veghel}, M. and {LHCb Collaboration}",

year = "2017",

month = mar,

day = "7",

doi = "10.1007/JHEP03(2017)036",

language = "English",

volume = "2017",

journal = "Journal of High Energy Physics",

issn = "1126-6708",

publisher = "Springer",

number = "3",

}

Aaij, R, Adeva, B, Adinolfi, M, Ajaltouni, Z, Akar, S, Albrecht, J, Alessio, F, Dufour, L, Mulder, M, Onderwater, CJG, Pellegrino, A, Tolk, S, van Veghel, M & LHCb Collaboration 2017, 'Measurement of the ratio of branching fractions and difference in CP asymmetries of the decays B ⁺ → J/ψπ ⁺ and B ⁺ → J/ψK ⁺', Journal of High Energy Physics, vol. 2017, no. 3, 036. https://doi.org/10.1007/JHEP03(2017)036

TY - JOUR

T1 - Measurement of the ratio of branching fractions and difference in CP asymmetries of the decays B + → J/ψπ + and B + → J/ψK +

AU - Aaij, R.

AU - Adeva, B.

AU - Adinolfi, M.

AU - Ajaltouni, Z.

AU - Akar, S.

AU - Albrecht, J.

AU - Alessio, F.

AU - Dufour, L.

AU - Mulder, M

AU - Onderwater, C. J. G.

AU - Pellegrino, A.

AU - Tolk, S.

AU - van Veghel, M.

AU - LHCb Collaboration

PY - 2017/3/7

Y1 - 2017/3/7

N2 - The ratio of branching fractions and the difference in CP asymmetries of the decays B+ -> J/psi pi(+) and B+ -> J/psi K+ are measured using a data sample of pp collisions collected by the LHCb experiment, corresponding to an integrated luminosity of 3 fb(-1) at centre -of -mass energies of 7 and 8 TeV. The results are B(B+ -> J/psi pi(+))/B(B+ -> J/psi K+) = (3.83 +/- 0.03 +/- 0.03) x 10(-2), A(CP)(B+ -> J/psi pi(+)) - A(CP)(B+ -> J/psi K+) = (1.82 +/- 0.86 +/- 0.14) x 10(-2), where the first uncertainties are statistical and the second are systematic. Combining this result with a recent LHCb measurement of A(CP)(B+ -> J/psi K+) provides the most precise estimate to date of CP violation in the decay B+ -> J/psi pi(+) A(CP)(B+ -> J/psi pi(+)) = (1.91 +/- 0.89 +/- 0.16) x 10(-2).

AB - The ratio of branching fractions and the difference in CP asymmetries of the decays B+ -> J/psi pi(+) and B+ -> J/psi K+ are measured using a data sample of pp collisions collected by the LHCb experiment, corresponding to an integrated luminosity of 3 fb(-1) at centre -of -mass energies of 7 and 8 TeV. The results are B(B+ -> J/psi pi(+))/B(B+ -> J/psi K+) = (3.83 +/- 0.03 +/- 0.03) x 10(-2), A(CP)(B+ -> J/psi pi(+)) - A(CP)(B+ -> J/psi K+) = (1.82 +/- 0.86 +/- 0.14) x 10(-2), where the first uncertainties are statistical and the second are systematic. Combining this result with a recent LHCb measurement of A(CP)(B+ -> J/psi K+) provides the most precise estimate to date of CP violation in the decay B+ -> J/psi pi(+) A(CP)(B+ -> J/psi pi(+)) = (1.91 +/- 0.89 +/- 0.16) x 10(-2).

KW - Hadron-Hadron scattering (experiments)

KW - CP violation

KW - B physics

KW - Branching fraction

U2 - 10.1007/JHEP03(2017)036

DO - 10.1007/JHEP03(2017)036

M3 - Article

SN - 1126-6708

VL - 2017

JO - Journal of High Energy Physics

JF - Journal of High Energy Physics

IS - 3

M1 - 036

ER -