Observation of B0(s) →j/ψp p decays and precision measurements of the B0(s) masses

LHCb Collaboration; R. Aaij; C. Abellán Beteta; B. Adeva; M. Adinolfi; C. A. Aidala; Z. Ajaltouni; S. Akar; P. Albicocco; J. Albrecht; F. Alessio; M. Alexander; A. Alfonso Albero; G. Alkhazov; P. Alvarez Cartelle; A. A. Alves; S. Amato; S. Amerio; Y. Amhis; L. An; L. Anderlini; G. Andreassi; M. Andreotti; J. E. Andrews; F. Archilli; J. Arnau Romeu; A. Artamonov; M. Artuso; K. Arzymatov; E. Aslanides; M. Atzeni; B. Audurier; S. Bachmann; J. J. Back; S. Baker; V. Balagura; W. Baldini; S. Bifani; R. Calladine; G. Chatzikonstantinidis; N. Farley; P. Griffith; P. Ilten; C. Lazzeroni; L. Pescatore; J. Plews; D. Popov; A. Sergi; M. W. Slater; N. K. Watson; K. A. Zarebski

doi:10.1103/PhysRevLett.122.191804

Observation of B⁰_(s) →j/ψp p decays and precision measurements of the B⁰_(s)masses

LHCb Collaboration, R. Aaij^*, C. Abellán Beteta, B. Adeva, M. Adinolfi, C. A. Aidala, Z. Ajaltouni, S. Akar, P. Albicocco, J. Albrecht, F. Alessio, M. Alexander, A. Alfonso Albero, G. Alkhazov, P. Alvarez Cartelle, A. A. Alves, S. Amato, S. Amerio, Y. Amhis, L. AnL. Anderlini, G. Andreassi, M. Andreotti, J. E. Andrews, F. Archilli, J. Arnau Romeu, A. Artamonov, M. Artuso, K. Arzymatov, E. Aslanides, M. Atzeni, B. Audurier, S. Bachmann, J. J. Back, S. Baker, V. Balagura, W. Baldini, S. Bifani, R. Calladine, G. Chatzikonstantinidis, N. Farley, P. Griffith, P. Ilten, C. Lazzeroni, L. Pescatore, J. Plews, D. Popov, A. Sergi, M. W. Slater, N. K. Watson, K. A. Zarebski

^*Corresponding author for this work

Physics and Astronomy

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Abstract

The first observation of the decays B⁰_(s) →J/ψpp is reported, using proton-proton collision data corresponding to an integrated luminosity of 5.2 fb-¹, collected with the LHCb detector. These decays are suppressed due to limited available phase space, as well as due to Okubo-Zweig-Iizuka or Cabibbo suppression. The measured branching fractions are B(B⁰→J/ψpp)=[4.51±0.40(stat)±0.44(syst)]×10-⁷, B(B⁰_s→J/ψpp)=[3.58±0.19(stat)±0.39(syst)]×10-⁶. For the B^₀_smeson, the result is much higher than the expected value of O(10-⁹). The small available phase space in these decays also allows for the most precise single measurement of both the B⁰ mass as 5279.74±0.30(stat)±0.10(syst) MeV and the B⁰_s mass as 5366.85±0.19(stat)±0.13(syst) MeV.

Original language	English
Article number	191804
Number of pages	10
Journal	Physical Review Letters
Volume	122
Issue number	19
DOIs	https://doi.org/10.1103/PhysRevLett.122.191804
Publication status	Published - 17 May 2019

ASJC Scopus subject areas

Physics and Astronomy(all)

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10.1103/PhysRevLett.122.191804Licence: Creative Commons: Attribution (CC BY)

LHCb_et_al_Observation_of_B0(s)_→j/ψp_p_decays_Physical_Review_Letters_2019
LHCb Collaboration, Aaij, R., Beteta, C.A., Adeva, B., Adinolfi, M., Aidala, C.A., Ajaltouni, Z., Akar, S., Albicocco, P., Albrecht, J., Alessio, F. and Alexander, M., (2019), 'Observation of B0(s)j/p p decays and precision measurements of the B0(s) masses', Physical Review Letters, vol. 122, no. 19, 191804. © 2019 CERN, for the LHCb Collaboration. https://doi.org/10.1103/PhysRevLett.122.191804
Final published version, 390 KBLicence: Creative Commons: Attribution (CC BY)

https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.122.191804Licence: Creative Commons: Attribution (CC BY)

Cite this

LHCb Collaboration, Aaij, R., Abellán Beteta, C., Adeva, B., Adinolfi, M., Aidala, C. A., Ajaltouni, Z., Akar, S., Albicocco, P., Albrecht, J., Alessio, F., Alexander, M., Alfonso Albero, A., Alkhazov, G., Alvarez Cartelle, P., Alves, A. A., Amato, S., Amerio, S., Amhis, Y., ... Zarebski, K. A. (2019). Observation of B⁰_(s) →j/ψp p decays and precision measurements of the B⁰_(s)masses. Physical Review Letters, 122(19), Article 191804. https://doi.org/10.1103/PhysRevLett.122.191804

@article{967ab0e4ecfc44e1ab16b51d11213250,

title = "Observation of B0(s) →j/ψp p decays and precision measurements of the B0(s) masses",

abstract = "The first observation of the decays B0(s) →J/ψpp is reported, using proton-proton collision data corresponding to an integrated luminosity of 5.2 fb-1, collected with the LHCb detector. These decays are suppressed due to limited available phase space, as well as due to Okubo-Zweig-Iizuka or Cabibbo suppression. The measured branching fractions are B(B0→J/ψpp)=[4.51±0.40(stat)±0.44(syst)]×10-7, B(B0s→J/ψpp)=[3.58±0.19(stat)±0.39(syst)]×10-6. For the B0s meson, the result is much higher than the expected value of O(10-9). The small available phase space in these decays also allows for the most precise single measurement of both the B0 mass as 5279.74±0.30(stat)±0.10(syst) MeV and the B0s mass as 5366.85±0.19(stat)±0.13(syst) MeV.",

author = "{LHCb Collaboration} and R. Aaij and {Abell{\'a}n Beteta}, C. and B. Adeva and M. Adinolfi and Aidala, {C. A.} and Z. Ajaltouni and S. Akar and P. Albicocco and J. Albrecht and F. Alessio and M. Alexander and {Alfonso Albero}, A. 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 G. Andreassi and M. Andreotti and Andrews, {J. E.} and F. Archilli and {Arnau Romeu}, J. and A. Artamonov and M. Artuso and K. Arzymatov and E. Aslanides and M. Atzeni and B. Audurier and S. Bachmann and Back, {J. J.} and S. Baker and V. Balagura and W. Baldini and S. Bifani and R. Calladine and G. Chatzikonstantinidis and N. Farley and P. Griffith and P. Ilten and C. Lazzeroni and L. Pescatore and J. Plews and D. Popov and A. Sergi and Slater, {M. W.} and Watson, {N. K.} and Zarebski, {K. A.}",

year = "2019",

month = may,

day = "17",

doi = "10.1103/PhysRevLett.122.191804",

language = "English",

volume = "122",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society (APS)",

number = "19",

}

LHCb Collaboration, Aaij, R, Abellán Beteta, C, Adeva, B, Adinolfi, M, Aidala, CA, Ajaltouni, Z, Akar, S, Albicocco, P, Albrecht, J, Alessio, F, Alexander, M, Alfonso Albero, A, Alkhazov, G, Alvarez Cartelle, P, Alves, AA, Amato, S, Amerio, S, Amhis, Y, An, L, Anderlini, L, Andreassi, G, Andreotti, M, Andrews, JE, Archilli, F, Arnau Romeu, J, Artamonov, A, Artuso, M, Arzymatov, K, Aslanides, E, Atzeni, M, Audurier, B, Bachmann, S, Back, JJ, Baker, S, Balagura, V, Baldini, W, Bifani, S, Calladine, R, Chatzikonstantinidis, G, Farley, N, Griffith, P, Ilten, P , Lazzeroni, C, Pescatore, L, Plews, J, Popov, D, Sergi, A, Slater, MW , Watson, NK & Zarebski, KA 2019, 'Observation of B⁰_(s) →j/ψp p decays and precision measurements of the B⁰_(s)masses', Physical Review Letters, vol. 122, no. 19, 191804. https://doi.org/10.1103/PhysRevLett.122.191804

TY - JOUR

T1 - Observation of B0(s) →j/ψp p decays and precision measurements of the B0(s) masses

AU - LHCb Collaboration

AU - Aaij, R.

AU - Abellán Beteta, C.

AU - Adeva, B.

AU - Adinolfi, M.

AU - Aidala, C. A.

AU - Ajaltouni, Z.

AU - Akar, S.

AU - Albicocco, P.

AU - Albrecht, J.

AU - Alessio, F.

AU - Alexander, M.

AU - Alfonso Albero, A.

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 - Andreassi, G.

AU - Andreotti, M.

AU - Andrews, J. E.

AU - Archilli, F.

AU - Arnau Romeu, J.

AU - Artamonov, A.

AU - Artuso, M.

AU - Arzymatov, K.

AU - Aslanides, E.

AU - Atzeni, M.

AU - Audurier, B.

AU - Bachmann, S.

AU - Back, J. J.

AU - Baker, S.

AU - Balagura, V.

AU - Baldini, W.

AU - Bifani, S.

AU - Calladine, R.

AU - Chatzikonstantinidis, G.

AU - Farley, N.

AU - Griffith, P.

AU - Ilten, P.

AU - Lazzeroni, C.

AU - Pescatore, L.

AU - Plews, J.

AU - Popov, D.

AU - Sergi, A.

AU - Slater, M. W.

AU - Watson, N. K.

AU - Zarebski, K. A.

PY - 2019/5/17

Y1 - 2019/5/17

N2 - The first observation of the decays B0(s) →J/ψpp is reported, using proton-proton collision data corresponding to an integrated luminosity of 5.2 fb-1, collected with the LHCb detector. These decays are suppressed due to limited available phase space, as well as due to Okubo-Zweig-Iizuka or Cabibbo suppression. The measured branching fractions are B(B0→J/ψpp)=[4.51±0.40(stat)±0.44(syst)]×10-7, B(B0s→J/ψpp)=[3.58±0.19(stat)±0.39(syst)]×10-6. For the B0s meson, the result is much higher than the expected value of O(10-9). The small available phase space in these decays also allows for the most precise single measurement of both the B0 mass as 5279.74±0.30(stat)±0.10(syst) MeV and the B0s mass as 5366.85±0.19(stat)±0.13(syst) MeV.

AB - The first observation of the decays B0(s) →J/ψpp is reported, using proton-proton collision data corresponding to an integrated luminosity of 5.2 fb-1, collected with the LHCb detector. These decays are suppressed due to limited available phase space, as well as due to Okubo-Zweig-Iizuka or Cabibbo suppression. The measured branching fractions are B(B0→J/ψpp)=[4.51±0.40(stat)±0.44(syst)]×10-7, B(B0s→J/ψpp)=[3.58±0.19(stat)±0.39(syst)]×10-6. For the B0s meson, the result is much higher than the expected value of O(10-9). The small available phase space in these decays also allows for the most precise single measurement of both the B0 mass as 5279.74±0.30(stat)±0.10(syst) MeV and the B0s mass as 5366.85±0.19(stat)±0.13(syst) MeV.

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U2 - 10.1103/PhysRevLett.122.191804

DO - 10.1103/PhysRevLett.122.191804

M3 - Article

C2 - 31144973

AN - SCOPUS:85065834588

SN - 0031-9007

VL - 122

JO - Physical Review Letters

JF - Physical Review Letters

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