物理セミナー/Physics seminar

分類物理セミナー
開始2017/09/05(火)16:00
終了2017/09/05(火)17:00
会場Room 345, Building #4, Tsukuba-campus (MCU 494)
講演タイトルb->sll decays, Standard Model and New Physics: facts and fantasy
講演者Sébastien Descotes-Genon (LPT Orsay, France)
言語英語/English
連絡先hideki.miyake@kek.jp (4896)
ウェブサイトhttps://www2.kek.jp/physics-seminar/
食堂・売店利用予定なし/0

概要

Recent data on b→sℓ+ℓ− transitions (ℓ=e,μ) exhibit a very interesting pattern of deviations from Standard Model expectations. I will recall the current situation of these anomalies in the B→K∗μ+μ− decay, as well as for other outstanding b→sℓ+ℓ− observables, in particular those indicating a violation of lepton-flavour universality (LFU). I will show how a model-independent global fit of b→sℓ+ℓ− observables favours several New Physics scenarios with high significances, with a remarkable degree of consistency between LFU-violating ratios and b→sμ+μ− observables. I will discuss alternative Standard Model explanations for these anomalies critically, relating them to issues in the corresponding theoretical computation. Finally, I will introduce new LFU-violating observables of interest for LHCb and Belle II which are able to shed further light on the cause of these anomalies.

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