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

The LHCb collaboration

doi:10.1007/JHEP06(2020)110

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

The LHCb collaboration

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24 Citas (Scopus)

Resumen

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 < p_T< 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. [Figure not available: see fulltext.]

Idioma original	Inglés
Número de artículo	110
Publicación	Journal of High Energy Physics
Volumen	2020
N.º	6
DOI	https://doi.org/10.1007/JHEP06(2020)110
Estado	Publicada - 1 jun. 2020
Publicado de forma externa	Sí

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@article{730160032d234ca8a3d839e4df017f90,

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. [Figure not available: see fulltext.]",

keywords = "B physics, Flavor physics, Hadron-Hadron scattering (experiments), Heavy quark production, Polarization",

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 A. Battig and A. Bay and M. Becker and Milanes, \{D. A.\}",

note = "Publisher Copyright: {\textcopyright} 2020, The Author(s).",

year = "2020",

month = jun,

day = "1",

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

language = "English",

volume = "2020",

journal = "Journal of High Energy Physics",

issn = "1126-6708",

number = "6",

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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 - Battig, A.

AU - Bay, A.

AU - Becker, M.

AU - Milanes, D. A.

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. [Figure not available: see fulltext.]

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. [Figure not available: see fulltext.]

KW - B physics

KW - Flavor physics

KW - Hadron-Hadron scattering (experiments)

KW - Heavy quark production

KW - Polarization

UR - https://www.scopus.com/pages/publications/85087042119

U2 - 10.1007/JHEP06(2020)110

DO - 10.1007/JHEP06(2020)110

M3 - Article

AN - SCOPUS:85087042119

SN - 1126-6708

VL - 2020

JO - Journal of High Energy Physics

JF - Journal of High Energy Physics

IS - 6

M1 - 110

ER -

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

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