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

Facultat Internacional de Comerç i Economia Digital La Salle

Producció científica: Article en revista indexada › Article › Avaluat per experts

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Resum

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.

Idioma original	Anglès
Número d’article	30
Revista	Journal of High Energy Physics
Volum	2017
Número	5
DOIs	https://doi.org/10.1007/JHEP05(2017)030
Estat de la publicació	Publicada - 1 de maig 2017

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10.1007/JHEP05(2017)030

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@article{60e3698d99744f96a1125d7085487149,

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 Gomez, \{M. Calvo\} and X. Vilasis-Cardona",

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",

}

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 - Gomez, M. Calvo

AU - Vilasis-Cardona, X.

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

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

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