Averages of 
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-hadron, 
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-hadron, and 
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-lepton properties as of 2021

Amhis, Y.; Banerjee, S.; Ben-Haim, E.; Bertholet, E.; Bernlochner, F. U.; Bóna, M.; Bożek, A.; Bozzi, C.; Brodzicka, J.; Chobanova, V.; Chrząszcz, M.; Duell, S.; Egede, U.; Gersabeck, M.; Gershon, T.; Goldenzweig, P.; Hayasaka, K.; Johnson, D. R.; Kenzie, M.; Kuhr, T.; Leroy, O.; Lusiani, A.; Ma, H.L.; Margoni, M.; Miyabayashi, K.; Mizuk, R.; Naik, P.; Nanut, T.; Oyanguren, A.; Pompili, A.; Prim, M. T.; Roney, J. M.; Rotondo, M.; Schneider, O.; Schwanda, C.; Schwartz, A. J.; Serrano, J.; Soffer, A.; Tonelli, D.; Urquijo, P.; Yelton, J.

doi:10.1103/physrevd.107.052008

Cited by 178 publications

(10 citation statements)

References 1,670 publications

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“…Our result, illustrated in Figure 3, is consistent with both the SM prediction of 0.254 ± 0.005 and the current experimental world average 0.284 ± 0.013 as reported in Ref. [11].…”

Section: Pos(hql2023)030supporting

confidence: 93%

“…Additionally, the fundamental principle of LU is challenged in a combination of several measurements of the ratios 𝑅(𝐷 ( * ) 𝜏/ℓ ) = B (𝐵 → 𝐷 ( * ) 𝜏 − 𝜈 𝜏 )/B (𝐵 → 𝐷 ( * ) ℓ − 𝜈 ℓ ) [3][4][5][6][7][8][9][10], resulting in a tension between experimental results and SM expectations of 3.3 𝜎 [11]. In Sections 6 and 7, we present two results that test this tension.…”

Section: Introductionmentioning

confidence: 99%

“…Figure 3: Our presented 𝑅(𝐷 *𝜏/ℓ ) and 𝑅(𝑋 𝜏/ℓ )[36] results (red) compared to related individual measurements (gold)[3][4][5][6][7][8][9][10] and the current world average (blue) as reported in Ref [11]…”

mentioning

confidence: 95%

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Lepton universality tests and searches for new physics in charged current decays at Belle II

Junkerkalefeld

2024

Proceedings of 16th International Conference on Heavy Quarks and Leptons — PoS(HQL2023)

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We present recent tests of lepton universality as crucial probes of the Standard Model in semileptonic 𝐵-meson decays at Belle II. All presented analyses use a data sample collected at the 𝛶(4𝑆) resonance by the Belle II experiment corresponding to an integrated luminosity of 189 fb −1 . We report three analyses that probe light-lepton universality: The first measurement of a complete set of five angular asymmetries using 𝐵 0 → 𝐷 * + ℓ − 𝜈 ℓ decays, followed by a measurement of the forward-backward asymmetry in untagged 𝐵 0 → 𝐷 * + ℓ − 𝜈 ℓ decays, and finally, measurements of the branching-fraction ratios 𝑅(𝐷 * + 𝑒/𝜇 ) = B (𝐵 0 → 𝐷 * + 𝑒 − 𝜈 𝑒 )/B (𝐵 0 → 𝐷 * + 𝜇 − 𝜈 𝜇 ), using the same untagged data set, along with the first measurement of the inclusive light-lepton ratio 𝑅(𝑋 𝑒/𝜇 ) = B (𝐵 → 𝑋𝑒 − 𝜈 𝑒 )/B (𝐵 → 𝑋 𝜇 − 𝜈 𝜇 ). Furthermore, we present two tests of heavy-to-light lepton universality. In the first test, we report the measurement of the branching-fraction ratio 𝑅(𝐷 * 𝜏/ℓ ) using hadronic tagging. In the second test, we present the first measurement of the inclusive ratio 𝑅(𝑋 𝜏/ℓ ). All presented results are consistent with their corresponding Standard Model predictions and, where applicable, with the experimental world averages.

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“…Our result, illustrated in Figure 3, is consistent with both the SM prediction of 0.254 ± 0.005 and the current experimental world average 0.284 ± 0.013 as reported in Ref. [11].…”

Section: Pos(hql2023)030supporting

confidence: 93%

Section: Introductionmentioning

confidence: 99%

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Lepton universality tests and searches for new physics in charged current decays at Belle II

Junkerkalefeld

2024

Proceedings of 16th International Conference on Heavy Quarks and Leptons — PoS(HQL2023)

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“…The main sources of systematic uncertainty are MC statistics and the 𝐸 ECL shape. Our result is consistent with both the Standard Model prediction and the world average [12].…”

Section: Pos(wifai2023)019supporting

confidence: 90%

Lepton Flavour Universality tests at Belle II

Gaudino

2024

Proceedings of Workshop Italiano Sulla Fisica ad Alta Intensità — PoS(WIFAI2023)

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We present some recent tests of lepton universality with semileptonic decays of 𝐵-mesons. The analyses are based on data collected at the Υ(4𝑆) resonance by the Belle II experiment, for an integrated luminosity of 189 fb −1 . This report includes two key analyses focusing on 𝜏 over 𝜇/𝑒 lepton universality. The first is the measurement of the branching-fraction ratio 𝑅(𝐷 * 𝜏/ℓ ) = B (𝐵 → 𝐷 * 𝜏 − 𝜈 𝑒 )/B (𝐵 → 𝐷 * ℓ − 𝜈 𝜇 ) using hadronic tagging. The second is the first measurement of the inclusive ratio 𝑅(𝑋 𝜏/ℓ ) = B (𝐵 → 𝑋𝜏 − 𝜈 𝑒 )/B (𝐵 → 𝑋ℓ − 𝜈 𝜇 ).We also present the branching-fraction ratios 𝑅(𝑋 𝑒/𝜇 ) = B (𝐵 → 𝑋𝑒 − 𝜈 𝑒 )/B (𝐵 → 𝑋 𝜇 − 𝜈 𝜇 ) and the first measurement of a comprehensive set of five angular asymmetries using 𝐵 0 → 𝐷 + ℓ − 𝜈 ℓ decays. All results presented are consistent with their corresponding Standard Model predictions and, where applicable, with the experimental world averages.

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“…These charged current transitions, mediated at tree-level in the SM, have significant branching ratios (O (10 −3 )). Here, the ratios 𝑅 𝐷 ( * ) = Br(𝐵 → 𝐷 ( * ) 𝜏𝜈)/ Br(𝐵 → 𝐷 ( * ) ℓ𝜈)), are bigger than the SM predictions by approximately 20%, resulting in a ⪆ 3𝜎 significance [25].…”

Section: 𝒃→𝒄ℓ𝝂mentioning

confidence: 82%

Anomalies in Particle Physics

Crivellin

2024

Proceedings of 8th Symposium on Prospects in the Physics of Discrete Symmetries — PoS(DISCRETE2022)

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I provide a (personal) review of the current hints for physics beyond the Standard Model, called "anomalies", obtained both at the intensity frontier (flavour and electroweak precision observables) and in direct LHC searches. This includes the deviations from the Standard Model predictions in semi-leptonic 𝐵 decays, the anomalous magnetic moment of the muon, the Cabibbo Angle Anomaly, the 𝑊 mass as well as non-resonant di-lepton searches, the hints for new scalar particles around ≈ 95 GeV, ≈ 151 GeV, ≈ 670 GeV and the (di-)di-jet excess at ≈ 1 TeV (≈ 3.6 TeV). Possible explanations in terms of new particles are briefly summarized and discussed.

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Averages of b -hadron, c -hadron, and τ -lepton properties as of 2021

Cited by 178 publications

References 1,670 publications

Lepton universality tests and searches for new physics in charged current decays at Belle II

Lepton universality tests and searches for new physics in charged current decays at Belle II

Lepton Flavour Universality tests at Belle II

Anomalies in Particle Physics

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