Zobrazeno 1 - 10
of 284
pro vyhledávání: '"Matthias Steinhauser"'
Publikováno v:
Journal of High Energy Physics, Vol 2023, Iss 11, Pp 1-21 (2023)
Abstract We compute three-loop vertex corrections to b → sγ induced by current-current operators. The results are presented as expansions in m c /m b with numerical coefficients which allow to cover all relevant values for the heavy quark masses i
Externí odkaz:
https://doaj.org/article/b0cd53282d2b4442a313bdeacdd4c91a
Autor:
Roman N. Lee, Andreas von Manteuffel, Robert M. Schabinger, Alexander V. Smirnov, Vladimir A. Smirnov, Matthias Steinhauser
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 83, Iss 11, Pp 1-10 (2023)
Abstract We present analytical results for all master integrals for massless three-point functions, with one off-shell leg, at four loops. Our solutions were obtained using differential equations and direct integration techniques. We review the metho
Externí odkaz:
https://doaj.org/article/2bae1a16c21449d7929f7abae1edd6d4
Publikováno v:
Journal of High Energy Physics, Vol 2023, Iss 10, Pp 1-19 (2023)
Abstract We compute two-loop electroweak corrections to Higgs boson pair and Higgs plus jet production, taking into account all sectors of the Standard Model. All diagrams with virtual top quarks are computed in an expansion for large top quark mass
Externí odkaz:
https://doaj.org/article/13b044523b3840748fbdbb5c9fc7536b
Publikováno v:
Journal of High Energy Physics, Vol 2023, Iss 9, Pp 1-23 (2023)
Abstract We compute next-to-next-to-leading order corrections to the semileptonic decay rate of B mesons for arbitrary values of the final-state quark mass. For the contribution with one massive quark in the final state, we extend the literature resu
Externí odkaz:
https://doaj.org/article/d1d47500aebd4fdeb70bb1e3c2f09c49
Publikováno v:
Journal of High Energy Physics, Vol 2023, Iss 6, Pp 1-26 (2023)
Abstract We consider two-loop corrections to 2 → 2 scattering processes with massive particles in the final state and massive particles in the loop. We discuss the combination of analytic expansions in the high-energy limit and for small Mandelstam
Externí odkaz:
https://doaj.org/article/76b8312486f84bd8a88fd3f322177cd7
Publikováno v:
Physics Letters B, Vol 845, Iss , Pp 138146- (2023)
We consider light-fermion three-loop corrections to gg→HH using forward scattering kinematics in the limit of a vanishing Higgs boson mass, which covers a large part of the physical phase space. We compute the form factors and discuss the technical
Externí odkaz:
https://doaj.org/article/6e56590b43944f2b9fca6747436374b1
Publikováno v:
Journal of High Energy Physics, Vol 2022, Iss 8, Pp 1-34 (2022)
Abstract We study the impact of third-order QCD corrections for several kinematic moments of the inclusive semileptonic B decays, to first order in the 1/m b expansion. We consider the first four moments of the charged-lepton energy E R spectrum, the
Externí odkaz:
https://doaj.org/article/449a74d87d9840eb976cf21ce2c4dc39
Autor:
Long Chen, Joshua Davies, Gudrun Heinrich, Stephen P. Jones, Matthias Kerner, Go Mishima, Johannes Schlenk, Matthias Steinhauser
Publikováno v:
Journal of High Energy Physics, Vol 2022, Iss 8, Pp 1-18 (2022)
Abstract We present fully differential next-to-leading order results for Higgs production in association with a Z boson in gluon fusion. Our two-loop virtual contributions are evaluated numerically using sector decomposition, including full top-quark
Externí odkaz:
https://doaj.org/article/a2fb26c6793c448ca61ff7944f853d23
Publikováno v:
Journal of High Energy Physics, Vol 2022, Iss 8, Pp 1-37 (2022)
Abstract We analytically compute two-loop Yukawa corrections to Higgs boson pair production in the high-energy limit. Such corrections are generated by an exchange of a Higgs boson between the virtual top quark lines. We propose two approaches to obt
Externí odkaz:
https://doaj.org/article/cdcabc2d103f403b96fe97b8e3c12a14
Publikováno v:
Journal of High Energy Physics, Vol 2022, Iss 4, Pp 1-32 (2022)
Abstract We complete the calculation of the element Γ 12 q $$ {\Gamma}_{12}^q $$ of the decay matrix in B q − B ¯ q $$ {B}_q-{\overline{B}}_q $$ mixing, q = d, s, to order α s in the leading power of the Heavy Quark Expansion. To this end we com
Externí odkaz:
https://doaj.org/article/71daa95ce07348c7a8cb178823912faf