Measurement of the Λ0b→ J/ψΛ angular distribution and the Λ0b polarisation in pp collisions

LHCb Collaboration

Measurement of the Λ⁰_b→ J/ψΛ angular distribution and the Λ⁰_b polarisation in pp collisions

LHCb Collaboration

Department of Physics

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

Abstract

This paper presents an analysis of the Λ⁰_b → J/ψΛ angular distribution and the transverse production polarisation of Λ⁰_b baryons in proton-proton collisions at centre-of-mass energies of 7, 8 and 13 TeV. The measurements are performed using data corresponding to an integrated luminosity of 4.9 fb⁻¹, collected with the LHCb experiment. The polarisation is determined in a fiducial region of Λ⁰_b transverse momentum and pseudorapidity of 1 < p_T < 20 GeV/c and 2 < η < 5, respectively. The data are consistent with Λ⁰_b baryons being produced unpolarised in this region. The parity-violating asymmetry parameter of the Λ→ pπ⁻ decay is also determined from the data and its value is found to be consistent with a recent measurement by the BES III collaboration.

Original language	English (US)
Journal	Unknown Journal
State	Published - Apr 22 2020

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@article{9d03394fc4fd47fba04e618b6ab192ce,

title = "Measurement of the Λ0b→ J/ψΛ angular distribution and the Λ0b polarisation in pp collisions",

abstract = "This paper presents an analysis of the Λ0b → J/ψΛ angular distribution and the transverse production polarisation of Λ0b baryons in proton-proton collisions at centre-of-mass energies of 7, 8 and 13 TeV. The measurements are performed using data corresponding to an integrated luminosity of 4.9 fb−1, collected with the LHCb experiment. The polarisation is determined in a fiducial region of Λ0b transverse momentum and pseudorapidity of 1 < pT < 20 GeV/c and 2 < η < 5, respectively. The data are consistent with Λ0b baryons being produced unpolarised in this region. The parity-violating asymmetry parameter of the Λ→ pπ− decay is also determined from the data and its value is found to be consistent with a recent measurement by the BES III collaboration.",

author = "{LHCb Collaboration} and R. Aaij and Beteta, {C. Abell{\'a}n} and T. Ackernley and B. Adeva and M. Adinolfi and H. Afsharnia and Aidala, {C. A.} and S. Aiola and Z. Ajaltouni and S. Akar and J. Albrecht and F. Alessio and M. Alexander and Albero, {A. Alfonso} and G. Alkhazov and Cartelle, {P. Alvarez} and Alves, {A. A.} and S. Amato and Y. Amhis and L. An and L. Anderlini and G. Andreassi and A. Andreianov and M. Andreotti and F. Archilli and A. Artamonov and M. Artuso and K. Arzymatov and E. Aslanides and M. Atzeni and B. Audurier and S. Bachmann and Back, {J. J.} and S. Baker and V. Balagura and W. Baldini and Leite, {J. Baptista} and Barlow, {R. J.} and S. Barsuk and W. Barter and M. Bartolini and F. Baryshnikov and Basels, {J. M.} and G. Bassi and V. Batozskaya and B. Batsukh and A. Battig and Rudolph, {M. S.} and T. Skwarnicki and S. Stone",

year = "2020",

month = apr,

day = "22",

language = "English (US)",

journal = "Nuclear Physics A",

issn = "0375-9474",

publisher = "Elsevier",

}

TY - JOUR

T1 - Measurement of the Λ0b→ J/ψΛ angular distribution and the Λ0b polarisation in pp collisions

AU - LHCb Collaboration

AU - Aaij, R.

AU - Beteta, C. Abellán

AU - Ackernley, T.

AU - Adeva, B.

AU - Adinolfi, M.

AU - Afsharnia, H.

AU - Aidala, C. A.

AU - Aiola, S.

AU - Ajaltouni, Z.

AU - Akar, S.

AU - Albrecht, J.

AU - Alessio, F.

AU - Alexander, M.

AU - Albero, A. Alfonso

AU - Alkhazov, G.

AU - Cartelle, P. Alvarez

AU - Alves, A. A.

AU - Amato, S.

AU - Amhis, Y.

AU - An, L.

AU - Anderlini, L.

AU - Andreassi, G.

AU - Andreianov, A.

AU - Andreotti, M.

AU - Archilli, F.

AU - Artamonov, A.

AU - Artuso, M.

AU - Arzymatov, K.

AU - Aslanides, E.

AU - Atzeni, M.

AU - Audurier, B.

AU - Bachmann, S.

AU - Back, J. J.

AU - Baker, S.

AU - Balagura, V.

AU - Baldini, W.

AU - Leite, J. Baptista

AU - Barlow, R. J.

AU - Barsuk, S.

AU - Barter, W.

AU - Bartolini, M.

AU - Baryshnikov, F.

AU - Basels, J. M.

AU - Bassi, G.

AU - Batozskaya, V.

AU - Batsukh, B.

AU - Battig, A.

AU - Rudolph, M. S.

AU - Skwarnicki, T.

AU - Stone, S.

PY - 2020/4/22

Y1 - 2020/4/22

N2 - This paper presents an analysis of the Λ0b → J/ψΛ angular distribution and the transverse production polarisation of Λ0b baryons in proton-proton collisions at centre-of-mass energies of 7, 8 and 13 TeV. The measurements are performed using data corresponding to an integrated luminosity of 4.9 fb−1, collected with the LHCb experiment. The polarisation is determined in a fiducial region of Λ0b transverse momentum and pseudorapidity of 1 < pT < 20 GeV/c and 2 < η < 5, respectively. The data are consistent with Λ0b baryons being produced unpolarised in this region. The parity-violating asymmetry parameter of the Λ→ pπ− decay is also determined from the data and its value is found to be consistent with a recent measurement by the BES III collaboration.

AB - This paper presents an analysis of the Λ0b → J/ψΛ angular distribution and the transverse production polarisation of Λ0b baryons in proton-proton collisions at centre-of-mass energies of 7, 8 and 13 TeV. The measurements are performed using data corresponding to an integrated luminosity of 4.9 fb−1, collected with the LHCb experiment. The polarisation is determined in a fiducial region of Λ0b transverse momentum and pseudorapidity of 1 < pT < 20 GeV/c and 2 < η < 5, respectively. The data are consistent with Λ0b baryons being produced unpolarised in this region. The parity-violating asymmetry parameter of the Λ→ pπ− decay is also determined from the data and its value is found to be consistent with a recent measurement by the BES III collaboration.

UR - http://www.scopus.com/inward/record.url?scp=85095019504&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85095019504&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:85095019504

JO - Nuclear Physics A

JF - Nuclear Physics A

SN - 0375-9474

ER -