Study of the D 0 p amplitude in Λb                        0 → D 0 pπ − decays

LHCb Collaboration

doi:10.1007/JHEP05(2017)030

Study of the D ⁰ p amplitude in Λ_b ⁰ → D ⁰ pπ ⁻ decays

LHCb Collaboration

Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

36 Citations (Scopus)

153 Downloads (Pure)

Abstract

An amplitude analysis of the decay Λ_b ⁰ → D⁰pπ⁻ is performed in the part of the phase space containing resonances in the D⁰p channel. The study is based on a data sample corresponding to an integrated luminosity of 3.0 fb⁻¹ of pp collisions recorded by the LHCb experiment. The spectrum of excited Λ_c ⁺ states that decay into D⁰p is studied. The masses, widths and quantum numbers of the Λ_c(2880)⁺ and Λ_c(2940)⁺ resonances are measured. The constraints on the spin and parity for the Λ_c(2940)⁺ state are obtained for the first time. A near-threshold enhancement in the D⁰p amplitude is investigated and found to be consistent with a new resonance, denoted the Λ_c(2860)⁺, of spin 3/2 and positive parity.

Original language	English
Article number	30
Journal	Journal of High Energy Physics
Volume	2017
Issue number	5
DOIs	https://doi.org/10.1007/JHEP05(2017)030
Publication status	Published - 5 May 2017

Keywords

B physics
Charm physics
Hadron-Hadron scattering (experiments)
QCD
Spectroscopy

ASJC Scopus subject areas

Nuclear and High Energy Physics

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Aaij_etal_Study_of_the_D0p amplitude_JHEP
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Cite this

@article{11de6ed364e7493ab429b38a51e05d9e,

title = "Study of the D 0 p amplitude in Λb 0 → D 0 pπ − decays",

abstract = "An amplitude analysis of the decay Λb 0 → D0pπ− is performed in the part of the phase space containing resonances in the D0p channel. The study is based on a data sample corresponding to an integrated luminosity of 3.0 fb−1 of pp collisions recorded by the LHCb experiment. The spectrum of excited Λc + states that decay into D0p is studied. The masses, widths and quantum numbers of the Λc(2880)+ and Λc(2940)+ resonances are measured. The constraints on the spin and parity for the Λc(2940)+ state are obtained for the first time. A near-threshold enhancement in the D0p amplitude is investigated and found to be consistent with a new resonance, denoted the Λc(2860)+, of spin 3/2 and positive parity.",

keywords = "B physics, Charm physics, Hadron-Hadron scattering (experiments), QCD, Spectroscopy",

author = "\{LHCb Collaboration\} and R. Aaij and B. Adeva and M. Adinolfi and Z. Ajaltouni and S. Akar and J. Albrecht and F. Alessio and M. Alexander and S. Ali and G. Alkhazov and Cartelle, \{P. Alvarez\} 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{\textquoteright}Argent and Romeu, \{J. Arnau\} and A. Artamonov and M. Artuso and E. Aslanides and G. Auriemma and M. Baalouch and I. Babuschkin and S. Bachmann and Back, \{J. J.\} and A. Badalov and C. Baesso and S. Baker and V. Balagura and W. Baldini and Barlow, \{R. J.\} and C. Barschel and S. Barsuk and W. Barter and S. Bifani and G. Chatzikonstantinidis and N. Farley and C. Lazzeroni and A. Mazurov and A. Sergi and Watson, \{N. K.\} and T. Williams and Zarebski, \{K. A.\}",

year = "2017",

month = may,

day = "5",

doi = "10.1007/JHEP05(2017)030",

language = "English",

volume = "2017",

journal = "Journal of High Energy Physics",

issn = "1126-6708",

publisher = "Springer",

number = "5",

}

TY - JOUR

T1 - Study of the D 0 p amplitude in Λb 0 → D 0 pπ − decays

AU - LHCb Collaboration

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 - Ali, S.

AU - Alkhazov, G.

AU - Cartelle, P. Alvarez

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 - Romeu, J. Arnau

AU - Artamonov, A.

AU - Artuso, M.

AU - Aslanides, E.

AU - Auriemma, G.

AU - Baalouch, M.

AU - Babuschkin, I.

AU - Bachmann, S.

AU - Back, J. J.

AU - Badalov, A.

AU - Baesso, C.

AU - Baker, S.

AU - Balagura, V.

AU - Baldini, W.

AU - Barlow, R. J.

AU - Barschel, C.

AU - Barsuk, S.

AU - Barter, W.

AU - Bifani, S.

AU - Chatzikonstantinidis, G.

AU - Farley, N.

AU - Lazzeroni, C.

AU - Mazurov, A.

AU - Sergi, A.

AU - Watson, N. K.

AU - Williams, T.

AU - Zarebski, K. A.

PY - 2017/5/5

Y1 - 2017/5/5

N2 - An amplitude analysis of the decay Λb 0 → D0pπ− is performed in the part of the phase space containing resonances in the D0p channel. The study is based on a data sample corresponding to an integrated luminosity of 3.0 fb−1 of pp collisions recorded by the LHCb experiment. The spectrum of excited Λc + states that decay into D0p is studied. The masses, widths and quantum numbers of the Λc(2880)+ and Λc(2940)+ resonances are measured. The constraints on the spin and parity for the Λc(2940)+ state are obtained for the first time. A near-threshold enhancement in the D0p amplitude is investigated and found to be consistent with a new resonance, denoted the Λc(2860)+, of spin 3/2 and positive parity.

AB - An amplitude analysis of the decay Λb 0 → D0pπ− is performed in the part of the phase space containing resonances in the D0p channel. The study is based on a data sample corresponding to an integrated luminosity of 3.0 fb−1 of pp collisions recorded by the LHCb experiment. The spectrum of excited Λc + states that decay into D0p is studied. The masses, widths and quantum numbers of the Λc(2880)+ and Λc(2940)+ resonances are measured. The constraints on the spin and parity for the Λc(2940)+ state are obtained for the first time. A near-threshold enhancement in the D0p amplitude is investigated and found to be consistent with a new resonance, denoted the Λc(2860)+, of spin 3/2 and positive parity.

KW - B physics

KW - Charm physics

KW - Hadron-Hadron scattering (experiments)

KW - QCD

KW - Spectroscopy

UR - https://www.scopus.com/pages/publications/85018878839

U2 - 10.1007/JHEP05(2017)030

DO - 10.1007/JHEP05(2017)030

M3 - Article

AN - SCOPUS:85018878839

SN - 1126-6708

VL - 2017

JO - Journal of High Energy Physics

JF - Journal of High Energy Physics

IS - 5

M1 - 30

ER -

Study of the D 0 p amplitude in Λb 0 → D 0 pπ − decays