Test of lepton universality with Λ b 0 → pK − ℓ + ℓ − decays
The ratio of branching fractions of the decays Λb0 → pK−e+e− and Λb0 → pK−μ+μ−, RpK−1, is measured for the first time using proton-proton collision data corresponding to an integrated luminosity of 4.7 fb−1 recorded with the LHCb experiment at center-of-mass energies of 7, 8 and 13 TeV. In the dilep...
| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Journal article |
| Language: | English |
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Springer
2020
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| _version_ | 1824459338408787968 |
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| author | Aaij, R Abellán Beteta, C Ackernley, T Adeva, B Adinolfi, M Afsharnia, H Aidala, CA Aiola, S Ajaltouni, Z Akar, S Albicocco, P Albrecht, J Alessio, F Alexander, M Alfonso Albero, A Alkhazov, G Alvarez Cartelle, P Alves, AA Amato, S Amhis, Y An, L Anderlini, L Andreassi, G Andreotti, M Bjørn, M Fischer, KM Gruberg Cazon, BR Hadavizadeh, T Hancock, TH Harnew, N Hill, D John, M Jurik, N Malde, S Murphy, CH Nandi, A Pili, M Pullen, H Renaudin, V Rollings, A Scantlebury Smead, LG Wilkinson, G |
| author_facet | Aaij, R Abellán Beteta, C Ackernley, T Adeva, B Adinolfi, M Afsharnia, H Aidala, CA Aiola, S Ajaltouni, Z Akar, S Albicocco, P Albrecht, J Alessio, F Alexander, M Alfonso Albero, A Alkhazov, G Alvarez Cartelle, P Alves, AA Amato, S Amhis, Y An, L Anderlini, L Andreassi, G Andreotti, M Bjørn, M Fischer, KM Gruberg Cazon, BR Hadavizadeh, T Hancock, TH Harnew, N Hill, D John, M Jurik, N Malde, S Murphy, CH Nandi, A Pili, M Pullen, H Renaudin, V Rollings, A Scantlebury Smead, LG Wilkinson, G |
| author_sort | Aaij, R |
| collection | OXFORD |
| description | The ratio of branching fractions of the decays Λb0 → pK−e+e− and Λb0 → pK−μ+μ−, RpK−1, is measured for the first time using proton-proton collision data corresponding to an integrated luminosity of 4.7 fb−1 recorded with the LHCb experiment at center-of-mass energies of 7, 8 and 13 TeV. In the dilepton mass-squared range 0.1 < q2< 6.0 GeV2/c4 and the pK− mass range m(pK−) < 2600 MeV/c2, the ratio of branching fractions is measured to be RpK−1=1.17−0.16+0.18±0.07, where the first uncertainty is statistical and the second systematic. This is the first test of lepton universality with b baryons and the first observation of the decay Λb0 → pK−e+e−. |
| first_indexed | 2025-02-19T04:40:12Z |
| format | Journal article |
| id | oxford-uuid:d98a0112-7978-4d4b-b537-2dda609bd709 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2025-02-19T04:40:12Z |
| publishDate | 2020 |
| publisher | Springer |
| record_format | dspace |
| spelling | oxford-uuid:d98a0112-7978-4d4b-b537-2dda609bd7092025-02-13T20:27:37ZTest of lepton universality with Λ b 0 → pK − ℓ + ℓ − decaysJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:d98a0112-7978-4d4b-b537-2dda609bd709EnglishJisc Publications RouterSpringer2020Aaij, RAbellán Beteta, CAckernley, TAdeva, BAdinolfi, MAfsharnia, HAidala, CAAiola, SAjaltouni, ZAkar, SAlbicocco, PAlbrecht, JAlessio, FAlexander, MAlfonso Albero, AAlkhazov, GAlvarez Cartelle, PAlves, AAAmato, SAmhis, YAn, LAnderlini, LAndreassi, GAndreotti, MBjørn, MFischer, KMGruberg Cazon, BRHadavizadeh, THancock, THHarnew, NHill, DJohn, MJurik, NMalde, SMurphy, CHNandi, APili, MPullen, HRenaudin, VRollings, AScantlebury Smead, LGWilkinson, GThe ratio of branching fractions of the decays Λb0 → pK−e+e− and Λb0 → pK−μ+μ−, RpK−1, is measured for the first time using proton-proton collision data corresponding to an integrated luminosity of 4.7 fb−1 recorded with the LHCb experiment at center-of-mass energies of 7, 8 and 13 TeV. In the dilepton mass-squared range 0.1 < q2< 6.0 GeV2/c4 and the pK− mass range m(pK−) < 2600 MeV/c2, the ratio of branching fractions is measured to be RpK−1=1.17−0.16+0.18±0.07, where the first uncertainty is statistical and the second systematic. This is the first test of lepton universality with b baryons and the first observation of the decay Λb0 → pK−e+e−. |
| spellingShingle | Aaij, R Abellán Beteta, C Ackernley, T Adeva, B Adinolfi, M Afsharnia, H Aidala, CA Aiola, S Ajaltouni, Z Akar, S Albicocco, P Albrecht, J Alessio, F Alexander, M Alfonso Albero, A Alkhazov, G Alvarez Cartelle, P Alves, AA Amato, S Amhis, Y An, L Anderlini, L Andreassi, G Andreotti, M Bjørn, M Fischer, KM Gruberg Cazon, BR Hadavizadeh, T Hancock, TH Harnew, N Hill, D John, M Jurik, N Malde, S Murphy, CH Nandi, A Pili, M Pullen, H Renaudin, V Rollings, A Scantlebury Smead, LG Wilkinson, G Test of lepton universality with Λ b 0 → pK − ℓ + ℓ − decays |
| title | Test of lepton universality with Λ b 0 → pK − ℓ + ℓ − decays |
| title_full | Test of lepton universality with Λ b 0 → pK − ℓ + ℓ − decays |
| title_fullStr | Test of lepton universality with Λ b 0 → pK − ℓ + ℓ − decays |
| title_full_unstemmed | Test of lepton universality with Λ b 0 → pK − ℓ + ℓ − decays |
| title_short | Test of lepton universality with Λ b 0 → pK − ℓ + ℓ − decays |
| title_sort | test of lepton universality with λ b 0 pk l l decays |
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