Measurement of CP observables in B± → D(⁎)K± and B± → D(⁎)π± decays

R. Aaij; B. Adeva; M. Adinolfi; Z. Ajaltouni; S. Akar; J. Albrecht; F. Alessio; M. Alexander; A. Alfonso Albero; S. Ali; 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; R. B. Appleby; F. Archilli; P. d'Argent; J. Arnau Romeu; A. Artamonov; M. Artuso; E. Aslanides; G. Auriemma; M. Baalouch; I. Babuschkin; S. Bachmann; W. Barter; A. Bitadze; S. Borghi; J. Brodzicka; C. Burr; L. Capriotti; S. De Capua; G. Dujany; M. Gersabeck; J. Harrison; C. Hombach; S. Klaver; G. Lafferty; K. Maguire; A. McNab; C. Parkes; P. Rodriguez Perez; G. Sarpis; LHCb Collaboration

doi:10.1016/j.physletb.2017.11.070

Measurement of CP observables in B^± → D^(⁎)K^± and B^± → D^(⁎)π^± decays

R. Aaij, B. Adeva, M. Adinolfi, Z. Ajaltouni, S. Akar, J. Albrecht, F. Alessio, M. Alexander, A. Alfonso Albero, S. Ali, G. Alkhazov, P. Alvarez Cartelle, A. A. Alves, S. Amato, S. Amerio, Y. Amhis, L. An, L. Anderlini, G. Andreassi, M. AndreottiJ. E. Andrews, R. B. Appleby, F. Archilli, P. d'Argent, J. Arnau Romeu, A. Artamonov, M. Artuso, E. Aslanides, G. Auriemma, M. Baalouch, I. Babuschkin, S. Bachmann, W. Barter, A. Bitadze, S. Borghi, J. Brodzicka, C. Burr, L. Capriotti, S. De Capua, G. Dujany, M. Gersabeck, J. Harrison, C. Hombach, S. Klaver, G. Lafferty, K. Maguire, A. McNab, C. Parkes, P. Rodriguez Perez, G. Sarpis, LHCb Collaboration

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Abstract

Measurements of CP observables in B^±→D^(⁎)K^± and B^±→D^(⁎)π^± decays are presented, where D^(⁎) indicates a neutral D or D^⁎ meson that is an admixture of D^(⁎)0 and D¯^(⁎)0 states. Decays of the D^⁎ meson to the Dπ⁰ and Dγ final states are partially reconstructed without inclusion of the neutral pion or photon, resulting in distinctive shapes in the B candidate invariant mass distribution. Decays of the D meson are fully reconstructed in the K^±π^∓, K⁺K⁻ and π⁺π⁻ final states. The analysis uses a sample of charged B mesons produced in pp collisions collected by the LHCb experiment, corresponding to an integrated luminosity of 2.0, 1.0 and 2.0 fb⁻¹ taken at centre-of-mass energies of s=7, 8 and 13 TeV, respectively. The study of B^±→D^⁎K^± and B^±→D^⁎π^± decays using a partial reconstruction method is the first of its kind, while the measurement of B^±→DK^± and B^±→Dπ^± decays is an update of previous LHCb measurements. The B^±→DK^± results are the most precise to date.

Original language	English
Pages (from-to)	16-30
Number of pages	15
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	777
Early online date	5 Dec 2017
DOIs	https://doi.org/10.1016/j.physletb.2017.11.070
Publication status	Published - 10 Feb 2018

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10.1016/j.physletb.2017.11.070

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Aaij, R., Adeva, B., Adinolfi, M., Ajaltouni, Z., Akar, S., Albrecht, J., Alessio, F., Alexander, M., Alfonso Albero, A., Ali, S., Alkhazov, G., Alvarez Cartelle, P., Alves, A. A., Amato, S., Amerio, S., Amhis, Y., An, L., Anderlini, L., Andreassi, G., ... LHCb Collaboration (2018). Measurement of CP observables in B^± → D^(⁎)K^± and B^± → D^(⁎)π^± decays. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 777, 16-30. https://doi.org/10.1016/j.physletb.2017.11.070

@article{49a0f2551b364816b5c5e424f66eb70c,

title = "Measurement of CP observables in B± → D(⁎)K± and B± → D(⁎)π± decays",

abstract = "Measurements of CP observables in B±→D(⁎)K± and B±→D(⁎)π± decays are presented, where D(⁎) indicates a neutral D or D⁎ meson that is an admixture of D(⁎)0 and D¯(⁎)0 states. Decays of the D⁎ meson to the Dπ0 and Dγ final states are partially reconstructed without inclusion of the neutral pion or photon, resulting in distinctive shapes in the B candidate invariant mass distribution. Decays of the D meson are fully reconstructed in the K±π∓, K+K− and π+π− final states. The analysis uses a sample of charged B mesons produced in pp collisions collected by the LHCb experiment, corresponding to an integrated luminosity of 2.0, 1.0 and 2.0 fb−1 taken at centre-of-mass energies of s=7, 8 and 13 TeV, respectively. The study of B±→D⁎K± and B±→D⁎π± decays using a partial reconstruction method is the first of its kind, while the measurement of B±→DK± and B±→Dπ± decays is an update of previous LHCb measurements. The B±→DK± results are the most precise to date.",

author = "R. Aaij and B. Adeva and M. Adinolfi and Z. Ajaltouni and S. Akar and J. Albrecht and F. Alessio and M. Alexander and {Alfonso Albero}, A. 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 G. Andreassi and M. Andreotti and Andrews, {J. E.} and Appleby, {R. B.} and F. Archilli and P. d'Argent and {Arnau Romeu}, J. and A. Artamonov and M. Artuso and E. Aslanides and G. Auriemma and M. Baalouch and I. Babuschkin and S. Bachmann and W. Barter and A. Bitadze and S. Borghi and J. Brodzicka and C. Burr and L. Capriotti and {De Capua}, S. and G. Dujany and M. Gersabeck and J. Harrison and C. Hombach and S. Klaver and G. Lafferty and K. Maguire and A. McNab and C. Parkes and {Rodriguez Perez}, P. and G. Sarpis and {LHCb Collaboration}",

year = "2018",

month = feb,

day = "10",

doi = "10.1016/j.physletb.2017.11.070",

language = "English",

volume = "777",

pages = "16--30",

journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",

issn = "0370-2693",

publisher = "Elsevier BV",

}

Aaij, R, Adeva, B, Adinolfi, M, Ajaltouni, Z, Akar, S, Albrecht, J, Alessio, F, Alexander, M, Alfonso Albero, A, Ali, S, Alkhazov, G, Alvarez Cartelle, P, Alves, AA, Amato, S, Amerio, S, Amhis, Y, An, L, Anderlini, L, Andreassi, G, Andreotti, M, Andrews, JE, Appleby, RB, Archilli, F, d'Argent, P, Arnau Romeu, J, Artamonov, A, Artuso, M, Aslanides, E, Auriemma, G, Baalouch, M, Babuschkin, I, Bachmann, S, Barter, W, Bitadze, A, Borghi, S, Brodzicka, J, Burr, C, Capriotti, L, De Capua, S, Dujany, G, Gersabeck, M, Harrison, J, Hombach, C, Klaver, S, Lafferty, G, Maguire, K, McNab, A, Parkes, C, Rodriguez Perez, P, Sarpis, G & LHCb Collaboration 2018, 'Measurement of CP observables in B^± → D^(⁎)K^± and B^± → D^(⁎)π^± decays', Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, vol. 777, pp. 16-30. https://doi.org/10.1016/j.physletb.2017.11.070

TY - JOUR

T1 - Measurement of CP observables in B± → D(⁎)K± and B± → D(⁎)π± decays

AU - Aaij, R.

AU - Adeva, B.

AU - Adinolfi, M.

AU - Ajaltouni, Z.

AU - Akar, S.

AU - Albrecht, J.

AU - Alessio, F.

AU - Alexander, M.

AU - Alfonso Albero, A.

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 - Andreassi, G.

AU - Andreotti, M.

AU - Andrews, J. E.

AU - Appleby, R. B.

AU - Archilli, F.

AU - d'Argent, P.

AU - Arnau Romeu, J.

AU - Artamonov, A.

AU - Artuso, M.

AU - Aslanides, E.

AU - Auriemma, G.

AU - Baalouch, M.

AU - Babuschkin, I.

AU - Bachmann, S.

AU - Barter, W.

AU - Bitadze, A.

AU - Borghi, S.

AU - Brodzicka, J.

AU - Burr, C.

AU - Capriotti, L.

AU - De Capua, S.

AU - Dujany, G.

AU - Gersabeck, M.

AU - Harrison, J.

AU - Hombach, C.

AU - Klaver, S.

AU - Lafferty, G.

AU - Maguire, K.

AU - McNab, A.

AU - Parkes, C.

AU - Rodriguez Perez, P.

AU - Sarpis, G.

AU - LHCb Collaboration

PY - 2018/2/10

Y1 - 2018/2/10

N2 - Measurements of CP observables in B±→D(⁎)K± and B±→D(⁎)π± decays are presented, where D(⁎) indicates a neutral D or D⁎ meson that is an admixture of D(⁎)0 and D¯(⁎)0 states. Decays of the D⁎ meson to the Dπ0 and Dγ final states are partially reconstructed without inclusion of the neutral pion or photon, resulting in distinctive shapes in the B candidate invariant mass distribution. Decays of the D meson are fully reconstructed in the K±π∓, K+K− and π+π− final states. The analysis uses a sample of charged B mesons produced in pp collisions collected by the LHCb experiment, corresponding to an integrated luminosity of 2.0, 1.0 and 2.0 fb−1 taken at centre-of-mass energies of s=7, 8 and 13 TeV, respectively. The study of B±→D⁎K± and B±→D⁎π± decays using a partial reconstruction method is the first of its kind, while the measurement of B±→DK± and B±→Dπ± decays is an update of previous LHCb measurements. The B±→DK± results are the most precise to date.

AB - Measurements of CP observables in B±→D(⁎)K± and B±→D(⁎)π± decays are presented, where D(⁎) indicates a neutral D or D⁎ meson that is an admixture of D(⁎)0 and D¯(⁎)0 states. Decays of the D⁎ meson to the Dπ0 and Dγ final states are partially reconstructed without inclusion of the neutral pion or photon, resulting in distinctive shapes in the B candidate invariant mass distribution. Decays of the D meson are fully reconstructed in the K±π∓, K+K− and π+π− final states. The analysis uses a sample of charged B mesons produced in pp collisions collected by the LHCb experiment, corresponding to an integrated luminosity of 2.0, 1.0 and 2.0 fb−1 taken at centre-of-mass energies of s=7, 8 and 13 TeV, respectively. The study of B±→D⁎K± and B±→D⁎π± decays using a partial reconstruction method is the first of its kind, while the measurement of B±→DK± and B±→Dπ± decays is an update of previous LHCb measurements. The B±→DK± results are the most precise to date.

UR - http://www.scopus.com/inward/record.url?scp=85037849546&partnerID=8YFLogxK

U2 - 10.1016/j.physletb.2017.11.070

DO - 10.1016/j.physletb.2017.11.070

M3 - Article

AN - SCOPUS:85037849546

SN - 0370-2693

VL - 777

SP - 16

EP - 30

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

ER -

Measurement of CP observables in B^± → D^(⁎)K^± and B^± → D^(⁎)π^± decays

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