Zobrazeno 1 - 10
of 55
pro vyhledávání: '"David M. Straub"'
Autor:
Jason Aebischer, Wolfgang Altmannshofer, Diego Guadagnoli, Méril Reboud, Peter Stangl, David M. Straub
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 80, Iss 3, Pp 1-27 (2020)
Abstract Following the updated measurement of the lepton flavour universality (LFU) ratio $$R_K$$ RK in $$B\rightarrow K\ell \ell $$ B→Kℓℓ decays by LHCb, as well as a number of further measurements, e.g. $$R_{K^*}$$ RK∗ by Belle and $$B_s \r
Externí odkaz:
https://doaj.org/article/705a37154c8443c1ad271386e2ea520a
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 79, Iss 6, Pp 1-31 (2019)
Abstract We present a global likelihood function in the space of dimension-six Wilson coefficients in the Standard Model Effective Field Theory. The likelihood includes contributions from flavour-changing neutral current B decays, lepton flavour univ
Externí odkaz:
https://doaj.org/article/39574f97a4ba4c9599cb623306d5acaf
Publikováno v:
Physics Letters B, Vol 792, Iss , Pp 465-469 (2019)
We present for the first time a master formula for ε′/ε, the ratio probing direct CP violation in K→ππ decays, valid in any ultraviolet extension of the Standard Model (BSM). The formula makes use of hadronic matrix elements of BSM operators
Externí odkaz:
https://doaj.org/article/469af8d305714581b6bdd7c7acd5b726
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 79, Iss 3, Pp 1-28 (2019)
Abstract We present for the first time a model-independent anatomy of the ratio $$\varepsilon '/\varepsilon $$ ε′/ε in the context of the $$\Delta S = 1$$ ΔS=1 effective theory with operators invariant under QCD and QED and in the context of the
Externí odkaz:
https://doaj.org/article/e2a072c4b601458f801b589915194fdc
Autor:
Martin Jung, David M. Straub
Publikováno v:
Journal of High Energy Physics, Vol 2019, Iss 1, Pp 1-28 (2019)
Abstract B decays proceeding via b → cℓν transitions with ℓ = e or μ are tree-level processes in the Standard Model. They are used to measure the CKM element V cb , as such forming an important ingredient in the determination of e.g. the unit
Externí odkaz:
https://doaj.org/article/e13b5154788441fb819b43a47aa5f5e3
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 78, Iss 12, Pp 1-8 (2018)
Abstract wilson is a Python library for matching and running Wilson coefficients of higher-dimensional operators beyond the Standard Model. Provided with the numerical values of the Wilson coefficients at a high new physics scale, it automatically pe
Externí odkaz:
https://doaj.org/article/5ae8f47c04334ff1918b78d64967196f
Autor:
Filippo Sala, David M. Straub
Publikováno v:
Physics Letters B, Vol 774, Iss C, Pp 205-209 (2017)
We investigate the possibility whether the tensions with SM expectations observed in several b→sℓℓ transitions, including hints for lepton flavour non-universality, could be due to the decay of B into a new light resonance. We find that qualita
Externí odkaz:
https://doaj.org/article/c4e2f66cac6a4cf29c7e52160ee76cd2
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 77, Iss 6, Pp 1-12 (2017)
Abstract Motivated by recent results by the ATLAS and CMS collaborations on the angular distribution of the $$B \rightarrow K^* \mu ^+\mu ^-$$ B → K ∗ μ + μ - decay, we perform a state-of-the-art analysis of rare B meson decays based on the $$b
Externí odkaz:
https://doaj.org/article/46d8211ddd3d49d9829493c1fd372fab
Publikováno v:
Journal of High Energy Physics, Vol 2017, Iss 5, Pp 1-29 (2017)
Abstract The rare flavour-changing neutral current decay B s → μ + μ − is among the most important indirect probes of new physics at the LHC, as it is strongly suppressed in the Standard Model, very sensitive to new physics effects, and theoret
Externí odkaz:
https://doaj.org/article/fe1e9aadc0434f499829799f9b8b3ad9
Publikováno v:
Journal of High Energy Physics, Vol 2017, Iss 4, Pp 1-50 (2017)
Abstract We conduct a detailed numerical analysis of the composite pseudo-Nambu-Goldstone Higgs model based on the next-to-minimal coset SO(6)/SO(5) ≅ SU(4)/Sp(4), featuring an additional SM singlet scalar in the spectrum, which we allow to mix wit
Externí odkaz:
https://doaj.org/article/803ff7010e374ecf8207377b9ccbea18