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

The LHCb collaboration

doi:10.1007/JHEP05(2017)030

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

The LHCb collaboration

European Organization for Nuclear Research
University Santiago de Compostela
University of Bristol
Clermont-Auvergne University
University of Cincinnati
University of Dortmund
SUPA
University of Glasgow
Science Park 105
Petersburg Nuclear Physics Institute (PNPI)
Imperial College London
Instituto de Biofisica da UFRJ
INFN
Laboratoire de l'Accélérateur Linéaire
Center for High Energy Physics
Tsinghua University
Istituto Nazionale di Fisica Nucleare, Sezione di Firenze
Institute of Physics
ENAC-IIC-GEL
Sezione INFN di Ferrara
University of Ferrara
University of Maryland, College Park
School of Physics and Astronomy
University of Manchester
University of Heidelberg
Aix-Marseille Université
Kurchatov Institute
Syracuse University
Sezione di Roma
Department of Physics
University of Warwick
University of Barcelona
Pontifícia Universidade Católica do Rio de Janeiro
P.N. Lebedev Physical Institute of the Russian Academy of Sciences
Institute for Theoretical and Experimental Physics
Institute for Nuclear Physics
National Centre for Nuclear Research (NCBJ)
Université Savoie Mont Blanc

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

89 Citations (Scopus)

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 - 1 May 2017

Keywords

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

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10.1007/JHEP05(2017)030

Cite this

@article{8848ed8329584c1c82c2bb4471dc7e71,

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 = "\{The 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 F. Baryshnikov and M. Baszczyk and V. Batozskaya and B. Batsukh and V. Battista and A. Bay and L. Beaucourt and F. Fleuret and E. Maurice",

note = "Publisher Copyright: {\textcopyright} 2017, The Author(s).",

year = "2017",

month = may,

day = "1",

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

language = "English",

volume = "2017",

journal = "Journal of High Energy Physics",

issn = "1126-6708",

publisher = "Springer Verlag",

number = "5",

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TY - JOUR

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

AU - The 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 - Baryshnikov, F.

AU - Baszczyk, M.

AU - Batozskaya, V.

AU - Batsukh, B.

AU - Battista, V.

AU - Bay, A.

AU - Beaucourt, L.

AU - Fleuret, F.

AU - Maurice, E.

PY - 2017/5/1

Y1 - 2017/5/1

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

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

Abstract

Keywords

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