Measurement of the Λb0 → J/ψΛ angular distribution and the Λb0 polarisation in pp collisions

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Measurement of the Λb0 → J/ψΛ angular distribution and the Λb0 polarisation in pp collisions. / The LHCb Collaboration ; Бондарь, Александр Евгеньевич ; Кроковный, Павел Петрович et al.

In: Journal of High Energy Physics, Vol. 2020, No. 6, 110, 01.06.2020.

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

BibTeX

@article{c0357eeb0fb644fc9cabc4e586423026,

title = "Measurement of the Λb0 → J/ψΛ angular distribution and the Λb0 polarisation in pp collisions",

abstract = "This paper presents an analysis of the Λb0→ J/ψΛ angular distribution and the transverse production polarisation of Λb0 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 Λb0 transverse momentum and pseudorapidity of 1 < pT< 20 GeV/c and 2 < η < 5, respectively. The data are consistent with Λb0 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.",

keywords = "B physics, Flavor physics, Hadron-Hadron scattering (experiments), Heavy quark production, Polarization, MONTE-CARLO, WEAK DECAYS, PARAMETERS, BARYON, TOOL",

author = "{The LHCb Collaboration} and R. Aaij and {Abell{\'a}n Beteta}, C. 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 {Alfonso Albero}, A. and G. Alkhazov and {Alvarez Cartelle}, P. 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 {Baptista Leite}, J. 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 S. Eidelman and V. Kudryavtsev and T. Maltsev and L. Shekhtman and Бондарь, {Александр Евгеньевич} and Кроковный, {Павел Петрович} and Воробьев, {Виталий Сергеевич}",

year = "2020",

month = jun,

day = "1",

doi = "10.1007/JHEP06(2020)110",

language = "English",

volume = "2020",

journal = "Journal of High Energy Physics",

issn = "1029-8479",

publisher = "Springer US",

number = "6",

}

RIS

TY - JOUR

T1 - Measurement of the Λb0 → J/ψΛ angular distribution and the Λb0 polarisation in pp collisions

AU - The LHCb Collaboration

AU - Aaij, R.

AU - Abellán Beteta, C.

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 - Alfonso Albero, A.

AU - Alkhazov, G.

AU - Alvarez Cartelle, P.

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 - Baptista Leite, J.

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 - Eidelman, S.

AU - Kudryavtsev, V.

AU - Maltsev, T.

AU - Shekhtman, L.

AU - Бондарь, Александр Евгеньевич

AU - Кроковный, Павел Петрович

AU - Воробьев, Виталий Сергеевич

PY - 2020/6/1

Y1 - 2020/6/1

N2 - This paper presents an analysis of the Λb0→ J/ψΛ angular distribution and the transverse production polarisation of Λb0 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 Λb0 transverse momentum and pseudorapidity of 1 < pT< 20 GeV/c and 2 < η < 5, respectively. The data are consistent with Λb0 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 Λb0→ J/ψΛ angular distribution and the transverse production polarisation of Λb0 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 Λb0 transverse momentum and pseudorapidity of 1 < pT< 20 GeV/c and 2 < η < 5, respectively. The data are consistent with Λb0 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.

KW - B physics

KW - Flavor physics

KW - Hadron-Hadron scattering (experiments)

KW - Heavy quark production

KW - Polarization

KW - MONTE-CARLO

KW - WEAK DECAYS

KW - PARAMETERS

KW - BARYON

KW - TOOL

UR - http://www.scopus.com/inward/record.url?scp=85087042119&partnerID=8YFLogxK

U2 - 10.1007/JHEP06(2020)110

DO - 10.1007/JHEP06(2020)110

M3 - Article

AN - SCOPUS:85087042119

VL - 2020

JO - Journal of High Energy Physics

JF - Journal of High Energy Physics

SN - 1029-8479

IS - 6

M1 - 110

ER -

ID: 24617453