Measurement of the time-dependent CP asymmetries in B0s → J/ψK0S

LHCb Collaboration; R. Aaij; B. Adeva; M. Adinolfi; A. Affolder; Z. Ajaltouni; S. Akar; J. Albrecht; F. Alessio; M. Alexander; S. Ali; G. Alkhazov; P. Alvarez Cartelle; A. A. Alves; S. Amato; S. Amerio; Y. Amhis; L. An; L. Anderlini; J. Anderson; M. Andreotti; J. E. Andrews; R. B. Appleby; O. Aquines Gutierrez; F. Archilli; A. Artamonov; M. Artuso; E. Aslanides; G. Auriemma; M. Baalouch; S. Bachmann; J. J. Back; A. Badalov; C. Baesso; W. Baldini; R. J. Barlow; C. Barschel; S. Barsuk; W. Barter; V. Batozskaya; S. Bifani; N. Farley; P. Griffith; P. Ilten; I. R. Kenyon; C. Lazzeroni; A. Mazurov; J. McCarthy; L. Pescatore; D. Popov; N. K. Watson

doi:10.1007/JHEP06(2015)131

Measurement of the time-dependent CP asymmetries in B⁰_s→ J/ψK⁰_S

LHCb Collaboration, R. Aaij, B. Adeva, M. Adinolfi, A. Affolder, Z. Ajaltouni, S. Akar, J. Albrecht, F. Alessio, M. Alexander, S. Ali, G. Alkhazov, P. Alvarez Cartelle, A. A. Alves, S. Amato, S. Amerio, Y. Amhis, L. An, L. Anderlini, J. AndersonM. Andreotti, J. E. Andrews, R. B. Appleby, O. Aquines Gutierrez, F. Archilli, A. Artamonov, M. Artuso, E. Aslanides, G. Auriemma, M. Baalouch, S. Bachmann, J. J. Back, A. Badalov, C. Baesso, W. Baldini, R. J. Barlow, C. Barschel, S. Barsuk, W. Barter, V. Batozskaya, S. Bifani, N. Farley, P. Griffith, P. Ilten, I. R. Kenyon, C. Lazzeroni, A. Mazurov, J. McCarthy, L. Pescatore, D. Popov, N. K. Watson

Physics and Astronomy

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Abstract

The first measurement of decay-time-dependent CP asymmetries in the decay B⁰_s → J/ψK⁰_S and an updated measurement of the ratio of branching fractions ℬ(B⁰_s → J/ψK⁰_S)/ℬ(B⁰ → J/ψK⁰_S) are presented. The results are obtained using data corresponding to an integrated luminosity of 3.0 fb⁻¹ of proton-proton collisions recorded with the LHCb detector at centre-of-mass energies of 7 and 8 TeV. The results on the CP asymmetries are A_∆Γ(B⁰_s → J/ψK⁰_S) = 0.49 ±^0.77 _0.65(stat) ± 0.06(syst), C_dir(B⁰_s → J/ψK⁰_S) = −0.28 ± 0.41(stat) ± 0.08(syst), S_mix(B⁰_s → J/ψK⁰_S) = −0.08 ± 0.40(stat) ± 0.08(syst). The ratio B(B⁰_s → J/ψK⁰_S)/B(B⁰ → J/ψK⁰_S) is measured to be 0.0431 ± 0.0017(stat) ± 0.0012(syst) ± 0.0025(f_s/f_d), where the last uncertainty is due to the knowledge of the B⁰_s and B⁰ production fractions.

Original language	English
Article number	131
Number of pages	22
Journal	Journal of High Energy Physics
Volume	2015
Issue number	6
DOIs	https://doi.org/10.1007/JHEP06(2015)131
Publication status	Published - 18 Jun 2015

Keywords

B physics
Branching fraction
CP violation
Flavor physics
Hadron-Hadron Scattering

ASJC Scopus subject areas

Nuclear and High Energy Physics

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Cite this

LHCb Collaboration, Aaij, R., Adeva, B., Adinolfi, M., Affolder, A., Ajaltouni, Z., Akar, S., Albrecht, J., Alessio, F., Alexander, M., Ali, S., Alkhazov, G., Alvarez Cartelle, P., Alves, A. A., Amato, S., Amerio, S., Amhis, Y., An, L., Anderlini, L., ... Watson, N. K. (2015). Measurement of the time-dependent CP asymmetries in B⁰_s→ J/ψK⁰_S. Journal of High Energy Physics, 2015(6), [131]. https://doi.org/10.1007/JHEP06(2015)131

@article{7b2f8792050549179d74a6ac1eda41ce,

title = "Measurement of the time-dependent CP asymmetries in B0s → J/ψK0S",

abstract = "The first measurement of decay-time-dependent CP asymmetries in the decay B0s → J/ψK0S and an updated measurement of the ratio of branching fractions ℬ(B0s → J/ψK0S)/ℬ(B0 → J/ψK0S) are presented. The results are obtained using data corresponding to an integrated luminosity of 3.0 fb−1 of proton-proton collisions recorded with the LHCb detector at centre-of-mass energies of 7 and 8 TeV. The results on the CP asymmetries are A∆Γ(B0s → J/ψK0S) = 0.49 ±0.77 0.65(stat) ± 0.06(syst), Cdir(B0s → J/ψK0S) = −0.28 ± 0.41(stat) ± 0.08(syst), Smix(B0s → J/ψK0S) = −0.08 ± 0.40(stat) ± 0.08(syst). The ratio B(B0s → J/ψK0S)/B(B0 → J/ψK0S) is measured to be 0.0431 ± 0.0017(stat) ± 0.0012(syst) ± 0.0025(fs/fd), where the last uncertainty is due to the knowledge of the B0s and B0 production fractions. ",

keywords = "B physics, Branching fraction, CP violation, Flavor physics, Hadron-Hadron Scattering",

author = "{LHCb Collaboration} and R. Aaij and B. Adeva and M. Adinolfi and A. Affolder and Z. Ajaltouni and S. Akar and J. Albrecht and F. Alessio and M. Alexander and S. Ali and G. Alkhazov and {Alvarez Cartelle}, P. and Alves, {A. A.} and S. Amato and S. Amerio and Y. Amhis and L. An and L. Anderlini and J. Anderson and M. Andreotti and Andrews, {J. E.} and Appleby, {R. B.} and {Aquines Gutierrez}, O. and F. Archilli and A. Artamonov and M. Artuso and E. Aslanides and G. Auriemma and M. Baalouch and S. Bachmann and Back, {J. J.} and A. Badalov and C. Baesso and W. Baldini and Barlow, {R. J.} and C. Barschel and S. Barsuk and W. Barter and V. Batozskaya and S. Bifani and N. Farley and P. Griffith and P. Ilten and Kenyon, {I. R.} and C. Lazzeroni and A. Mazurov and J. McCarthy and L. Pescatore and D. Popov and Watson, {N. K.}",

year = "2015",

month = jun,

day = "18",

doi = "10.1007/JHEP06(2015)131",

language = "English",

volume = "2015",

journal = "JHEP",

issn = "1126-6708",

publisher = "Springer",

number = "6",

}

LHCb Collaboration, Aaij, R, Adeva, B, Adinolfi, M, Affolder, A, Ajaltouni, Z, Akar, S, Albrecht, J, Alessio, F, Alexander, M, Ali, S, Alkhazov, G, Alvarez Cartelle, P, Alves, AA, Amato, S, Amerio, S, Amhis, Y, An, L, Anderlini, L, Anderson, J, Andreotti, M, Andrews, JE, Appleby, RB, Aquines Gutierrez, O, Archilli, F, Artamonov, A, Artuso, M, Aslanides, E, Auriemma, G, Baalouch, M, Bachmann, S, Back, JJ, Badalov, A, Baesso, C, Baldini, W, Barlow, RJ, Barschel, C, Barsuk, S, Barter, W, Batozskaya, V, Bifani, S, Farley, N, Griffith, P, Ilten, P, Kenyon, IR, Lazzeroni, C, Mazurov, A, McCarthy, J, Pescatore, L, Popov, D & Watson, NK 2015, 'Measurement of the time-dependent CP asymmetries in B⁰_s→ J/ψK⁰_S', Journal of High Energy Physics, vol. 2015, no. 6, 131. https://doi.org/10.1007/JHEP06(2015)131

TY - JOUR

T1 - Measurement of the time-dependent CP asymmetries in B0s → J/ψK0S

AU - LHCb Collaboration

AU - Aaij, R.

AU - Adeva, B.

AU - Adinolfi, M.

AU - Affolder, A.

AU - Ajaltouni, Z.

AU - Akar, S.

AU - Albrecht, J.

AU - Alessio, F.

AU - Alexander, M.

AU - Ali, S.

AU - Alkhazov, G.

AU - Alvarez Cartelle, P.

AU - Alves, A. A.

AU - Amato, S.

AU - Amerio, S.

AU - Amhis, Y.

AU - An, L.

AU - Anderlini, L.

AU - Anderson, J.

AU - Andreotti, M.

AU - Andrews, J. E.

AU - Appleby, R. B.

AU - Aquines Gutierrez, O.

AU - Archilli, F.

AU - Artamonov, A.

AU - Artuso, M.

AU - Aslanides, E.

AU - Auriemma, G.

AU - Baalouch, M.

AU - Bachmann, S.

AU - Back, J. J.

AU - Badalov, A.

AU - Baesso, C.

AU - Baldini, W.

AU - Barlow, R. J.

AU - Barschel, C.

AU - Barsuk, S.

AU - Barter, W.

AU - Batozskaya, V.

AU - Bifani, S.

AU - Farley, N.

AU - Griffith, P.

AU - Ilten, P.

AU - Kenyon, I. R.

AU - Lazzeroni, C.

AU - Mazurov, A.

AU - McCarthy, J.

AU - Pescatore, L.

AU - Popov, D.

AU - Watson, N. K.

PY - 2015/6/18

Y1 - 2015/6/18

N2 - The first measurement of decay-time-dependent CP asymmetries in the decay B0s → J/ψK0S and an updated measurement of the ratio of branching fractions ℬ(B0s → J/ψK0S)/ℬ(B0 → J/ψK0S) are presented. The results are obtained using data corresponding to an integrated luminosity of 3.0 fb−1 of proton-proton collisions recorded with the LHCb detector at centre-of-mass energies of 7 and 8 TeV. The results on the CP asymmetries are A∆Γ(B0s → J/ψK0S) = 0.49 ±0.77 0.65(stat) ± 0.06(syst), Cdir(B0s → J/ψK0S) = −0.28 ± 0.41(stat) ± 0.08(syst), Smix(B0s → J/ψK0S) = −0.08 ± 0.40(stat) ± 0.08(syst). The ratio B(B0s → J/ψK0S)/B(B0 → J/ψK0S) is measured to be 0.0431 ± 0.0017(stat) ± 0.0012(syst) ± 0.0025(fs/fd), where the last uncertainty is due to the knowledge of the B0s and B0 production fractions.

AB - The first measurement of decay-time-dependent CP asymmetries in the decay B0s → J/ψK0S and an updated measurement of the ratio of branching fractions ℬ(B0s → J/ψK0S)/ℬ(B0 → J/ψK0S) are presented. The results are obtained using data corresponding to an integrated luminosity of 3.0 fb−1 of proton-proton collisions recorded with the LHCb detector at centre-of-mass energies of 7 and 8 TeV. The results on the CP asymmetries are A∆Γ(B0s → J/ψK0S) = 0.49 ±0.77 0.65(stat) ± 0.06(syst), Cdir(B0s → J/ψK0S) = −0.28 ± 0.41(stat) ± 0.08(syst), Smix(B0s → J/ψK0S) = −0.08 ± 0.40(stat) ± 0.08(syst). The ratio B(B0s → J/ψK0S)/B(B0 → J/ψK0S) is measured to be 0.0431 ± 0.0017(stat) ± 0.0012(syst) ± 0.0025(fs/fd), where the last uncertainty is due to the knowledge of the B0s and B0 production fractions.

KW - B physics

KW - Branching fraction

KW - CP violation

KW - Flavor physics

KW - Hadron-Hadron Scattering

UR - http://www.scopus.com/inward/record.url?scp=84973454445&partnerID=8YFLogxK

U2 - 10.1007/JHEP06(2015)131

DO - 10.1007/JHEP06(2015)131

M3 - Article

AN - SCOPUS:84973454445

SN - 1126-6708

VL - 2015

JO - JHEP

JF - JHEP

IS - 6

M1 - 131

ER -

Measurement of the time-dependent CP asymmetries in B0s → J/ψK0S