Search for resonance-enhanced 𝐶𝑃 and angular asymmetries in the [Lambda]+ 𝑐 →𝑝[mu]+[mu]- decay at LHCb
The first measurement of the 𝐶𝑃 asymmetry of the decay rate (𝐴𝐶𝑃) and the 𝐶𝑃 average (Σ𝐴FB) and 𝐶𝑃 asymmetry (Δ𝐴FB) of the forward-backward asymmetry in the muon system of Λ+𝑐 →𝑝𝜇+𝜇− decays is reported. The measurement is performed using a data sample of proton-proton collisions, recorded by...
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| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , , , , |
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| Corporate Author: | |
| Format: | Article (Journal) |
| Language: | English |
| Published: |
12 May, 2025
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| In: |
Physical review
Year: 2025, Volume: 111, Issue: 9, Pages: 1-14 |
| ISSN: | 2470-0029 |
| DOI: | 10.1103/PhysRevD.111.L091102 |
| Online Access: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1103/PhysRevD.111.L091102 Verlag, lizenzpflichtig, Volltext: https://link.aps.org/doi/10.1103/PhysRevD.111.L091102 
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| Author Notes: | R. Aaij et al. (LHCb Collaboration*) |
MARC
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| 245 | 1 | 0 | |a Search for resonance-enhanced and angular asymmetries in the [Lambda]+ →[mu]+[mu]- decay at LHCb |c R. Aaij et al. (LHCb Collaboration*) |
| 246 | 3 | 0 | |a Λ |
| 246 | 3 | 3 | |a Search for resonance-enhanced and angular asymmetries in the [Lambda] + → [mu] + [mu] - decay at LHCb |
| 264 | 1 | |c 12 May, 2025 | |
| 300 | |b Illustrationen | ||
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| 500 | |a Veröffentlicht: 12. Mai 2025 | ||
| 500 | |a Im Titel sind die Plus- und Minuszeichen hochgestellt sowie der Buchstabe "c" tiefgestellt | ||
| 500 | |a *LHCb Collaboration: R. Aaij, S. Bachmann, L. Carus, R. Caspary, S. Celani, C. Cocha Toapaxi, M. De Cian, L. Dittmann, S. Esen, F.C. Glaser, P.A. Günther, X. Han, S. Hansmann-Menzemer, P. Herrero Gascon, C. Langenbruch, B. Leverington, J. Marks, S.R. Roy, M. Ruiz Diaz, M.D. Tat, G. Tuci, L.H. Uecker, D.J. Unverzagt, U. Uwer, C. Wang, L. Witola, Y. Zhao, A. Zhelezov [und 1123 weitere Personen] | ||
| 500 | |a Gesehen am 13.11.2025 | ||
| 520 | |a The first measurement of the asymmetry of the decay rate () and the average (ΣFB) and asymmetry (ΔFB) of the forward-backward asymmetry in the muon system of Λ+ →+− decays is reported. The measurement is performed using a data sample of proton-proton collisions, recorded by the LHCb experiment from 2016 to 2018 at a center-of-mass energy of 13 TeV, which corresponds to an integrated luminosity of 5.4 fb−1. The asymmetries are measured in two regions of dimuon mass near the -meson mass peak. The dimuon-mass integrated results are =(−1.1 ±4.0 ±0.5)%, ΣFB =(3.9 ±4.0 ±0.6)%, ΔFB =(3.1 ±4.0 ±0.4)%, where the first uncertainty is statistical and the second systematic. The results are consistent with the conservation of symmetry and the Standard Model expectations. | ||
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