Study of the D0p amplitude in Λb0 → D0pπ− decays

R. Aaij; B. Adeva; M. Adinolfi; 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; LA Everse; 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; K. Carvalho Akiba; V. Coco; P. N.Y. David; K. De Bruyn; M. Ferro-Luzzi; T. Ketel; R. F. Koopman; J. van Leerdam; M. Merk; C. J.G. Onderwater; G. Raven; M. Schiller; N. Serra; H. Snoek; B. Storaci; V. Syropoulos; J. van Tilburg; S. Tolk; P. Tsopelas; N. Tuning; The LHCb collaboration

doi:10.1007/JHEP05(2017)030

Study of the D⁰p amplitude in Λ_b⁰ → D⁰pπ⁻ decays

R. Aaij, B. Adeva, M. Adinolfi, 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, LA Everse, L. Anderlini, G. Andreassi, M. Andreotti, J.E. AndrewsR. B. Appleby, F. Archilli, P. d’Argent, J. Arnau Romeu, A. Artamonov, M. Artuso, E. Aslanides, G. Auriemma, M. Baalouch, I. Babuschkin, K. Carvalho Akiba, V. Coco, P. N.Y. David, K. De Bruyn, M. Ferro-Luzzi, T. Ketel, R. F. Koopman, J. van Leerdam, M. Merk, C. J.G. Onderwater, G. Raven, M. Schiller, N. Serra, H. Snoek, B. Storaci, V. Syropoulos, J. van Tilburg, S. Tolk, P. Tsopelas, N. Tuning, The LHCb collaboration

(Astro)-Particles Physics

Research output: Contribution to Journal › Article › Academic › peer-review

Abstract

An amplitude analysis of the decay Λ_b⁰ → 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

Funding

Funders	Funder number
Not added	1681016, ST/G005974/1
Science and Technology Facilities Council	ST/J004332/1, ST/N000250/1, 1641747, ST/K003410/1, 1708182, ST/H006737/1, LHCb, ST/N000331/1, GRIDPP, LHCb Upgrades, 1707993
Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung	166208

Keywords

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

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10.1007/JHEP05(2017)030

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Aaij, R., Adeva, B., Adinolfi, M., Ajaltouni, Z., Akar, S., Albrecht, J., Alessio, F., Alexander, M., Ali, S., Alkhazov, G., Cartelle, P. A., Alves, A. A., Amato, S., Amerio, S., Amhis, Y., Everse, LA., Anderlini, L., Andreassi, G., Andreotti, M., ... The LHCb collaboration (2017). Study of the D⁰p amplitude in Λ_b⁰ → D⁰pπ⁻ decays. Journal of High Energy Physics, 2017(5), Article 30. https://doi.org/10.1007/JHEP05(2017)030

@article{fabd99d1f0864206a9405e05240eee08,

title = "Study of the D0p amplitude in Λb0 → D0pπ− decays",

abstract = "An amplitude analysis of the decay Λb0 → 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 = "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 LA Everse and L. Anderlini and G. Andreassi and M. Andreotti and J.E. Andrews 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 Akiba, {K. Carvalho} and V. Coco and David, {P. N.Y.} and {De Bruyn}, K. and M. Ferro-Luzzi and T. Ketel and Koopman, {R. F.} and {van Leerdam}, J. and M. Merk and Onderwater, {C. J.G.} and G. Raven and M. Schiller and N. Serra and H. Snoek and B. Storaci and V. Syropoulos and {van Tilburg}, J. and S. Tolk and P. Tsopelas and N. Tuning and {The LHCb collaboration}",

year = "2017",

month = may,

day = "5",

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

language = "English",

volume = "2017",

journal = "Journal of High Energy Physics",

issn = "1029-8479",

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Aaij, R, Adeva, B, Adinolfi, M, Ajaltouni, Z, Akar, S, Albrecht, J, Alessio, F, Alexander, M, Ali, S, Alkhazov, G, Cartelle, PA, Alves, AA, Amato, S, Amerio, S, Amhis, Y, Everse, LA, Anderlini, L, Andreassi, G, Andreotti, M, Andrews, JE, Appleby, RB, Archilli, F, d’Argent, P, Romeu, JA, Artamonov, A, Artuso, M, Aslanides, E, Auriemma, G, Baalouch, M, Babuschkin, I, Akiba, KC, Coco, V, David, PNY, De Bruyn, K, Ferro-Luzzi, M, Ketel, T, Koopman, RF, van Leerdam, J, Merk, M, Onderwater, CJG, Raven, G, Schiller, M, Serra, N, Snoek, H, Storaci, B, Syropoulos, V, van Tilburg, J, Tolk, S, Tsopelas, P, Tuning, N & The LHCb collaboration 2017, 'Study of the D⁰p amplitude in Λ_b⁰ → D⁰pπ⁻ decays', Journal of High Energy Physics, vol. 2017, no. 5, 30. https://doi.org/10.1007/JHEP05(2017)030

TY - JOUR

T1 - Study of the D0p amplitude in Λb0 → D0pπ− 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 - Ali, S.

AU - Alkhazov, G.

AU - Cartelle, P. Alvarez

AU - Alves, A. A.

AU - Amato, S.

AU - Amerio, S.

AU - Amhis, Y.

AU - Everse, LA

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 - Akiba, K. Carvalho

AU - Coco, V.

AU - David, P. N.Y.

AU - De Bruyn, K.

AU - Ferro-Luzzi, M.

AU - Ketel, T.

AU - Koopman, R. F.

AU - van Leerdam, J.

AU - Merk, M.

AU - Onderwater, C. J.G.

AU - Raven, G.

AU - Schiller, M.

AU - Serra, N.

AU - Snoek, H.

AU - Storaci, B.

AU - Syropoulos, V.

AU - van Tilburg, J.

AU - Tolk, S.

AU - Tsopelas, P.

AU - Tuning, N.

AU - The LHCb collaboration

PY - 2017/5/5

Y1 - 2017/5/5

N2 - An amplitude analysis of the decay Λb0 → 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 Λb0 → 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 - http://www.scopus.com/inward/record.url?scp=85018878839&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85018878839&partnerID=8YFLogxK

U2 - 10.1007/JHEP05(2017)030

DO - 10.1007/JHEP05(2017)030

M3 - Article

AN - SCOPUS:85018878839

SN - 1029-8479

VL - 2017

JO - Journal of High Energy Physics

JF - Journal of High Energy Physics

IS - 5

M1 - 30

ER -