Study of B- → DK-π+π- and B- → Dπ-π+π- decays and determination of the CKM angle γ

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; P. D'Argent; 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; I. R. Kenyon; C. Lazzeroni; A. Mazurov; J. McCarthy; L. Pescatore; N. K. Watson; T. Williams

doi:10.1103/PhysRevD.92.112005

Study of B^- → DK^-π⁺π^- and B^- → Dπ^-π⁺π^- decays and determination of the CKM angle γ

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, P. D'Argent, 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, I. R. Kenyon, C. Lazzeroni, A. Mazurov, J. McCarthy, L. Pescatore, N. K. Watson, T. Williams

Physics and Astronomy

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Abstract

We report a study of the suppressed B^-→ DK^-π⁺π^- and favored B^-→ Dπ^-π⁺π^- decays, where the neutral D meson is detected through its decays to the K^∓π^± and CP -even K⁺K^- and π⁺π^- final states. The measurement is carried out using a proton-proton collision data sample collected by the LHCb experiment, corresponding to an integrated luminosity of 3.0 fb^-1. We observe the first significant signals in the CP -even final states of the D meson for both the suppressed B^-→ DK^-π⁺π^- and favored B^-→ Dπ^-π⁺π^- modes, as well as in the doubly Cabibbo suppressed D → K⁺π^- final state of the B^-→ Dπ^-π⁺π^- decay. Evidence for the suppressed decay B^-→ DK^-π⁺π^-, with D → K⁺π^-, is also presented. From the observed yields in the B^-→ DK^-π⁺π^-, B^-→ Dπ^-π⁺π^- and their charge conjugate decay modes, the most probable value of the weak phase γ corresponds to γ=(74⁺²⁰_-19)°. This is one of the most precise single-measurement determinations of γ to date.

Original language	English
Article number	112005
Number of pages	20
Journal	Physical Review D
Volume	92
Issue number	11
DOIs	https://doi.org/10.1103/PhysRevD.92.112005
Publication status	Published - 17 Dec 2015

ASJC Scopus subject areas

Nuclear and High Energy Physics

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https://doi.org/10.1103/PhysRevD.92.112005Licence: Creative Commons: Attribution (CC BY)

PPGP Capital Equipment Call
Newman, P. (Principal Investigator)
SCIENCE & TECHNOLOGY FACILITIES COUNCIL
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Project: Research Councils
ATLAS - UK Tracker Upgrade
Newman, P. (Principal Investigator)
SCIENCE & TECHNOLOGY FACILITIES COUNCIL
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Project: Research Councils
Birmimgham Experimental Particle Physics Consolidated Grant
Newman, P. (Principal Investigator), Charlton, D. (Co-Investigator), Hawkes, C. (Co-Investigator), Lazzeroni, C. (Co-Investigator), Nikolopoulos, K. (Co-Investigator), Watson, A. (Co-Investigator), Watson, N. (Co-Investigator) & Wilson, J. (Co-Investigator)
SCIENCE & TECHNOLOGY FACILITIES COUNCIL
1/10/12 → 30/09/16
Project: Research Councils
2012 Consolidated Grant Supplement
Newman, P. (Principal Investigator)
SCIENCE & TECHNOLOGY FACILITIES COUNCIL
1/10/12 → 31/03/14
Project: Research Councils
Wakeham Efficiency Saving PP
Newman, P. (Principal Investigator)
SCIENCE & TECHNOLOGY FACILITIES COUNCIL
9/03/12 → 31/03/12
Project: Research Councils
Experimental Particle Physics 2009-2014
Newman, P. (Principal Investigator), Charlton, D. (Co-Investigator), Hawkes, C. (Co-Investigator), Watkins, P. (Co-Investigator), Watson, A. (Co-Investigator), Watson, N. (Co-Investigator), Wilson, J. (Co-Investigator) & Lazzeroni, C. (Co-Investigator)
SCIENCE & TECHNOLOGY FACILITIES COUNCIL
1/10/09 → 30/09/12
Project: Research Councils
Experimental Particle Physics 2006-2011
Watkins, P. (Principal Investigator), Charlton, D. (Co-Investigator), Evans, P. (Co-Investigator), Hawkes, C. (Co-Investigator), Newman, P. (Co-Investigator), Watson, A. (Co-Investigator), Watson, N. (Co-Investigator) & Wilson, J. (Co-Investigator)
SCIENCE & TECHNOLOGY FACILITIES COUNCIL
1/10/06 → 30/09/11
Project: Research Councils

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., ... Williams, T. (2015). Study of B^- → DK^-π⁺π^- and B^- → Dπ^-π⁺π^- decays and determination of the CKM angle γ. Physical Review D, 92(11), Article 112005. https://doi.org/10.1103/PhysRevD.92.112005

@article{2ed7cdc0c510413e82e4e9d497214695,

title = "Study of B- → DK-π+π- and B- → Dπ-π+π- decays and determination of the CKM angle γ",

abstract = "We report a study of the suppressed B- → DK-π+π- and favored B- → Dπ-π+π- decays, where the neutral D meson is detected through its decays to the K∓π± and CP -even K+K- and π+π- final states. The measurement is carried out using a proton-proton collision data sample collected by the LHCb experiment, corresponding to an integrated luminosity of 3.0 fb-1. We observe the first significant signals in the CP -even final states of the D meson for both the suppressed B- → DK-π+π- and favored B- → Dπ-π+π- modes, as well as in the doubly Cabibbo suppressed D → K+π- final state of the B- → Dπ-π+π- decay. Evidence for the suppressed decay B- → DK-π+π-, with D → K+π-, is also presented. From the observed yields in the B- → DK-π+π-, B- → Dπ-π+π- and their charge conjugate decay modes, the most probable value of the weak phase γ corresponds to γ=(74+20-19)°. This is one of the most precise single-measurement determinations of γ to date.",

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 P. D'Argent 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 Kenyon, {I. R.} and C. Lazzeroni and A. Mazurov and J. McCarthy and L. Pescatore and Watson, {N. K.} and T. Williams",

year = "2015",

month = dec,

day = "17",

doi = "10.1103/PhysRevD.92.112005",

language = "English",

volume = "92",

journal = "Physical Review D",

issn = "1550-7998",

publisher = "American Physical Society (APS)",

number = "11",

}

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, D'Argent, P, 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, Kenyon, IR, Lazzeroni, C, Mazurov, A, McCarthy, J, Pescatore, L, Watson, NK & Williams, T 2015, 'Study of B^- → DK^-π⁺π^- and B^- → Dπ^-π⁺π^- decays and determination of the CKM angle γ', Physical Review D, vol. 92, no. 11, 112005. https://doi.org/10.1103/PhysRevD.92.112005

TY - JOUR

T1 - Study of B- → DK-π+π- and B- → Dπ-π+π- decays and determination of the CKM angle γ

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 - D'Argent, P.

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 - Kenyon, I. R.

AU - Lazzeroni, C.

AU - Mazurov, A.

AU - McCarthy, J.

AU - Pescatore, L.

AU - Watson, N. K.

AU - Williams, T.

PY - 2015/12/17

Y1 - 2015/12/17

N2 - We report a study of the suppressed B- → DK-π+π- and favored B- → Dπ-π+π- decays, where the neutral D meson is detected through its decays to the K∓π± and CP -even K+K- and π+π- final states. The measurement is carried out using a proton-proton collision data sample collected by the LHCb experiment, corresponding to an integrated luminosity of 3.0 fb-1. We observe the first significant signals in the CP -even final states of the D meson for both the suppressed B- → DK-π+π- and favored B- → Dπ-π+π- modes, as well as in the doubly Cabibbo suppressed D → K+π- final state of the B- → Dπ-π+π- decay. Evidence for the suppressed decay B- → DK-π+π-, with D → K+π-, is also presented. From the observed yields in the B- → DK-π+π-, B- → Dπ-π+π- and their charge conjugate decay modes, the most probable value of the weak phase γ corresponds to γ=(74+20-19)°. This is one of the most precise single-measurement determinations of γ to date.

AB - We report a study of the suppressed B- → DK-π+π- and favored B- → Dπ-π+π- decays, where the neutral D meson is detected through its decays to the K∓π± and CP -even K+K- and π+π- final states. The measurement is carried out using a proton-proton collision data sample collected by the LHCb experiment, corresponding to an integrated luminosity of 3.0 fb-1. We observe the first significant signals in the CP -even final states of the D meson for both the suppressed B- → DK-π+π- and favored B- → Dπ-π+π- modes, as well as in the doubly Cabibbo suppressed D → K+π- final state of the B- → Dπ-π+π- decay. Evidence for the suppressed decay B- → DK-π+π-, with D → K+π-, is also presented. From the observed yields in the B- → DK-π+π-, B- → Dπ-π+π- and their charge conjugate decay modes, the most probable value of the weak phase γ corresponds to γ=(74+20-19)°. This is one of the most precise single-measurement determinations of γ to date.

UR - http://www.scopus.com/inward/record.url?scp=84952361982&partnerID=8YFLogxK

U2 - 10.1103/PhysRevD.92.112005

DO - 10.1103/PhysRevD.92.112005

M3 - Article

AN - SCOPUS:84952361982

SN - 1550-7998

VL - 92

JO - Physical Review D

JF - Physical Review D

IS - 11

M1 - 112005

ER -

Study of B- → DK-π+π- and B- → Dπ-π+π- decays and determination of the CKM angle γ

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PPGP Capital Equipment Call

ATLAS - UK Tracker Upgrade

Birmimgham Experimental Particle Physics Consolidated Grant

2012 Consolidated Grant Supplement

Wakeham Efficiency Saving PP

Experimental Particle Physics 2009-2014

Experimental Particle Physics 2006-2011

Cite this

Study of B^- → DK^-π⁺π^- and B^- → Dπ^-π⁺π^- decays and determination of the CKM angle γ