First observation of the Λ b 0 → D + D − Λ decay
The Λb0 → D+D−Λ decay is observed for the first time using proton-proton collision data collected by the LHCb experiment at a center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 5.3 fb−1. Using the B0 → D+D−KS0 decay as a reference channel, the product of the relative produ...
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| Format: | Journal article |
| Sprache: | English |
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Springer
2024
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| _version_ | 1826313537636532224 |
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| author | Aaij, R Abdelmotteleb, ASW Abellan Beteta, C Abudinén, F Ackernley, T Adams, JA Adefisoye, AA Adeva, B Adinolfi, M Adlarson, P Agapopoulou, C Aidala, CA Ajaltouni, Z Akar, S Akiba, K Albicocco, P Albrecht, J Alessio, F Alexander, M Aliouche, Z Alvarez Cartelle, P Amalric, R Amato, S Amey, JL Bacher, D Cervenkov, D Fischer, KM Gao, R Gilman, AL Goncalves Abrantes, F Harnew, N John, M Mackay, I Malde, S Mohammed, RA Pajero, T Patoc, J Resmi, PK Scantlebury Smead, LG Smallwood, JC Stanislaus, S Suljik, F Tat, MD Wilkinson, G |
| author_facet | Aaij, R Abdelmotteleb, ASW Abellan Beteta, C Abudinén, F Ackernley, T Adams, JA Adefisoye, AA Adeva, B Adinolfi, M Adlarson, P Agapopoulou, C Aidala, CA Ajaltouni, Z Akar, S Akiba, K Albicocco, P Albrecht, J Alessio, F Alexander, M Aliouche, Z Alvarez Cartelle, P Amalric, R Amato, S Amey, JL Bacher, D Cervenkov, D Fischer, KM Gao, R Gilman, AL Goncalves Abrantes, F Harnew, N John, M Mackay, I Malde, S Mohammed, RA Pajero, T Patoc, J Resmi, PK Scantlebury Smead, LG Smallwood, JC Stanislaus, S Suljik, F Tat, MD Wilkinson, G |
| author_sort | Aaij, R |
| collection | OXFORD |
| description | The Λb0 → D+D−Λ decay is observed for the first time using proton-proton collision data collected by the LHCb experiment at a center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 5.3 fb−1. Using the B0 → D+D−KS0 decay as a reference channel, the product of the relative production cross-section and decay branching fractions is measured to beR=σΛb0σB0=BΛb0→D+D−ΛBB0→D+D−KS0=0.179±0.022±0.014, where the first uncertainty is statistical and the second is systematic. The known branching fraction of the reference channel, BB0→D+D−KS0, and the cross-section ratio, σΛb0/σB0, previously measured by LHCb are used to derive the branching fraction of the Λb0→ D+D−Λ decayBΛb0→D+D−Λ=1.24±0.15±0.10±0.28±0.11×10−4, where the third and fourth contributions are due to uncertainties of BB0→D+D−KS0 and σΛb0/σB0, respectively. Inspection of the D+Λ and D+D− invariant-mass distributions suggests a rich presence of intermediate resonances in the decay. The Λb0 → D*+D−Λ decay is also observed for the first time as a partially reconstructed component in the D+D−Λ invariant mass spectrum. |
| first_indexed | 2024-09-25T04:16:02Z |
| format | Journal article |
| id | oxford-uuid:c3c03f2c-45e7-4e96-b875-f6689269e1ea |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-09-25T04:16:02Z |
| publishDate | 2024 |
| publisher | Springer |
| record_format | dspace |
| spelling | oxford-uuid:c3c03f2c-45e7-4e96-b875-f6689269e1ea2024-07-18T20:12:43ZFirst observation of the Λ b 0 → D + D − Λ decayJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:c3c03f2c-45e7-4e96-b875-f6689269e1eaEnglishJisc Publications RouterSpringer2024Aaij, RAbdelmotteleb, ASWAbellan Beteta, CAbudinén, FAckernley, TAdams, JAAdefisoye, AAAdeva, BAdinolfi, MAdlarson, PAgapopoulou, CAidala, CAAjaltouni, ZAkar, SAkiba, KAlbicocco, PAlbrecht, JAlessio, FAlexander, MAliouche, ZAlvarez Cartelle, PAmalric, RAmato, SAmey, JLBacher, DCervenkov, DFischer, KMGao, RGilman, ALGoncalves Abrantes, FHarnew, NJohn, MMackay, IMalde, SMohammed, RAPajero, TPatoc, JResmi, PKScantlebury Smead, LGSmallwood, JCStanislaus, SSuljik, FTat, MDWilkinson, GThe Λb0 → D+D−Λ decay is observed for the first time using proton-proton collision data collected by the LHCb experiment at a center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 5.3 fb−1. Using the B0 → D+D−KS0 decay as a reference channel, the product of the relative production cross-section and decay branching fractions is measured to beR=σΛb0σB0=BΛb0→D+D−ΛBB0→D+D−KS0=0.179±0.022±0.014, where the first uncertainty is statistical and the second is systematic. The known branching fraction of the reference channel, BB0→D+D−KS0, and the cross-section ratio, σΛb0/σB0, previously measured by LHCb are used to derive the branching fraction of the Λb0→ D+D−Λ decayBΛb0→D+D−Λ=1.24±0.15±0.10±0.28±0.11×10−4, where the third and fourth contributions are due to uncertainties of BB0→D+D−KS0 and σΛb0/σB0, respectively. Inspection of the D+Λ and D+D− invariant-mass distributions suggests a rich presence of intermediate resonances in the decay. The Λb0 → D*+D−Λ decay is also observed for the first time as a partially reconstructed component in the D+D−Λ invariant mass spectrum. |
| spellingShingle | Aaij, R Abdelmotteleb, ASW Abellan Beteta, C Abudinén, F Ackernley, T Adams, JA Adefisoye, AA Adeva, B Adinolfi, M Adlarson, P Agapopoulou, C Aidala, CA Ajaltouni, Z Akar, S Akiba, K Albicocco, P Albrecht, J Alessio, F Alexander, M Aliouche, Z Alvarez Cartelle, P Amalric, R Amato, S Amey, JL Bacher, D Cervenkov, D Fischer, KM Gao, R Gilman, AL Goncalves Abrantes, F Harnew, N John, M Mackay, I Malde, S Mohammed, RA Pajero, T Patoc, J Resmi, PK Scantlebury Smead, LG Smallwood, JC Stanislaus, S Suljik, F Tat, MD Wilkinson, G First observation of the Λ b 0 → D + D − Λ decay |
| title | First observation of the Λ b 0 → D + D − Λ decay |
| title_full | First observation of the Λ b 0 → D + D − Λ decay |
| title_fullStr | First observation of the Λ b 0 → D + D − Λ decay |
| title_full_unstemmed | First observation of the Λ b 0 → D + D − Λ decay |
| title_short | First observation of the Λ b 0 → D + D − Λ decay |
| title_sort | first observation of the λ b 0 d d λ decay |
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