Measurement of the Λb0$$ {\Lambda}_b^0 $$→ J/ψΛ angular distribution and the Λb0$$ {\Lambda}_b^0 $$ polarisation in pp collisions
Abstract This paper presents an analysis of the Λb0$$ {\Lambda}_b^0 $$→ J/ψΛ angular distribution and the transverse production polarisation of Λb0$$ {\Lambda}_b^0 $$ baryons in proton-proton collisions at centre-of-mass energies of 7, 8 and 13 TeV. The measurements are performed using data corre...
| Main Authors: | , , , , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Springer Berlin Heidelberg
2021
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| Online Access: | https://hdl.handle.net/1721.1/131711 |
| _version_ | 1826189971894042624 |
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| author | Aaij, R. Abellán Beteta, C. Ackernley, T. Adeva, B. Adinolfi, M. Afsharnia, H. Aidala, C. A Aiola, S. Ajaltouni, Z. Akar, S. Albrecht, J. Alessio, F. Alexander, M. Alfonso Albero, A. Alkhazov, G. |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics Aaij, R. Abellán Beteta, C. Ackernley, T. Adeva, B. Adinolfi, M. Afsharnia, H. Aidala, C. A Aiola, S. Ajaltouni, Z. Akar, S. Albrecht, J. Alessio, F. Alexander, M. Alfonso Albero, A. Alkhazov, G. |
| author_sort | Aaij, R. |
| collection | MIT |
| description | Abstract
This paper presents an analysis of the Λb0$$ {\Lambda}_b^0 $$→ J/ψΛ angular distribution and the transverse production polarisation of Λb0$$ {\Lambda}_b^0 $$ 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$$ {\Lambda}_b^0 $$ transverse momentum and pseudorapidity of 1 < pT< 20 GeV/c and 2 < η < 5, respectively. The data are consistent with Λb0$$ {\Lambda}_b^0 $$ 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. |
| first_indexed | 2024-09-23T08:33:03Z |
| format | Article |
| id | mit-1721.1/131711 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T08:33:03Z |
| publishDate | 2021 |
| publisher | Springer Berlin Heidelberg |
| record_format | dspace |
| spelling | mit-1721.1/1317112023-12-14T15:36:26Z Measurement of the Λb0$$ {\Lambda}_b^0 $$→ J/ψΛ angular distribution and the Λb0$$ {\Lambda}_b^0 $$ polarisation in pp collisions Aaij, R. Abellán Beteta, C. Ackernley, T. Adeva, B. Adinolfi, M. Afsharnia, H. Aidala, C. A Aiola, S. Ajaltouni, Z. Akar, S. Albrecht, J. Alessio, F. Alexander, M. Alfonso Albero, A. Alkhazov, G. Massachusetts Institute of Technology. Department of Physics Abstract This paper presents an analysis of the Λb0$$ {\Lambda}_b^0 $$→ J/ψΛ angular distribution and the transverse production polarisation of Λb0$$ {\Lambda}_b^0 $$ 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$$ {\Lambda}_b^0 $$ transverse momentum and pseudorapidity of 1 < pT< 20 GeV/c and 2 < η < 5, respectively. The data are consistent with Λb0$$ {\Lambda}_b^0 $$ 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. 2021-09-20T17:29:51Z 2021-09-20T17:29:51Z 2020-06-17 2020-06-26T13:26:55Z Article http://purl.org/eprint/type/JournalArticle https://hdl.handle.net/1721.1/131711 Journal of High Energy Physics. 2020 Jun 17;2020(6):110 PUBLISHER_CC en https://doi.org/10.1007/JHEP06(2020)110 Creative Commons Attribution https://creativecommons.org/licenses/by/4.0/ The Author(s) application/pdf Springer Berlin Heidelberg Springer Berlin Heidelberg |
| spellingShingle | Aaij, R. Abellán Beteta, C. Ackernley, T. Adeva, B. Adinolfi, M. Afsharnia, H. Aidala, C. A Aiola, S. Ajaltouni, Z. Akar, S. Albrecht, J. Alessio, F. Alexander, M. Alfonso Albero, A. Alkhazov, G. Measurement of the Λb0$$ {\Lambda}_b^0 $$→ J/ψΛ angular distribution and the Λb0$$ {\Lambda}_b^0 $$ polarisation in pp collisions |
| title | Measurement of the Λb0$$ {\Lambda}_b^0 $$→ J/ψΛ angular distribution and the Λb0$$ {\Lambda}_b^0 $$ polarisation in pp collisions |
| title_full | Measurement of the Λb0$$ {\Lambda}_b^0 $$→ J/ψΛ angular distribution and the Λb0$$ {\Lambda}_b^0 $$ polarisation in pp collisions |
| title_fullStr | Measurement of the Λb0$$ {\Lambda}_b^0 $$→ J/ψΛ angular distribution and the Λb0$$ {\Lambda}_b^0 $$ polarisation in pp collisions |
| title_full_unstemmed | Measurement of the Λb0$$ {\Lambda}_b^0 $$→ J/ψΛ angular distribution and the Λb0$$ {\Lambda}_b^0 $$ polarisation in pp collisions |
| title_short | Measurement of the Λb0$$ {\Lambda}_b^0 $$→ J/ψΛ angular distribution and the Λb0$$ {\Lambda}_b^0 $$ polarisation in pp collisions |
| title_sort | measurement of the λb0 lambda b 0 j ψλ angular distribution and the λb0 lambda b 0 polarisation in pp collisions |
| url | https://hdl.handle.net/1721.1/131711 |
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