Specific three-loop contributions to b → sγ associated with the current-current operators

Autor: Christoph Greub, Hrachia M. Asatrian, Francesco Saturnino, Christoph Wiegand

Publikováno v: Journal of High Energy Physics, Vol 2023, Iss 5, Pp 1-21 (2023)

Abstract We work out a specific class of three-loop diagrams (of order α s 2 $$ {\alpha}_s^2 $$ ) contributing to the decay amplitude for b → sγ associated with the current-current operators O 1 and O 2 at the physical value of the charm-quark ma

Externí odkaz: https://doaj.org/article/7f4faa4b1cb94cfb9b569ab41ddc9a57

The MSSM without gluinos; an effective field theory for the stop sector

Autor: Jason Aebischer, Andreas Crivellin, Christoph Greub, Youichi Yamada

Publikováno v: European Physical Journal C: Particles and Fields, Vol 77, Iss 11, Pp 1-8 (2017)

Abstract In this article we study the MSSM with stops and Higgs scalars much lighter than gluinos and squarks of the first two generations. In this setup, one should use an effective field theory with partial supersymmetry in which the gluino and hea

Externí odkaz: https://doaj.org/article/0f4a7fc75e0040de8fbc9d70c95f5402

Scalar leptoquarks in leptonic processes

Autor: Dario Müller, Andreas Crivellin, Francesco Saturnino, Christoph Greub

Publikováno v: Journal of High Energy Physics
Crivellin, Andreas; Greub, Christoph; Müller, Dario; Saturnino, Francesco (2021). Scalar leptoquarks in leptonic processes. Journal of High Energy Physics, 2021(2) Springer 10.1007/JHEP02(2021)182

Leptoquarks are hypothetical new particles, which couple quarks directly to leptons. They experienced a renaissance in recent years as they are prime candidates to explain the so-called \textit{flavor anomalies}, i.e. the deviations between the Stand

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e8c1e4ec23282d1554617b4afd34eeeb

Importance of Loop Effects in Explaining the Accumulated Evidence for New Physics in B Decays with a Vector Leptoquark

Autor: Christoph Greub, Francesco Saturnino, Dario Müller, Andreas Crivellin

Publikováno v: Physical Review Letters
Crivellin, Andreas; Greub, Christoph; Saturnino, Francesco; Müller, Dario (2019). Importance of Loop Effects in Explaining the Accumulated Evidence for New Physics in B Decays with a Vector Leptoquark. Physical review letters, 122(1), 011805. American Physical Society 10.1103/PhysRevLett.122.011805

In recent years experiments revealed intriguing hints for new physics (NP) in $B$ decays involving \bctaunu and $b\to s\ell^+\ell^-$ transitions at the $4\,\sigma$ and $5\,\sigma$ level, respectively. In addition, there are slight disagreements in $b

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::11a0707e3d0c7004b832440e24f5c6a4
https://doi.org/10.1103/physrevlett.122.011805

The MSSM without Gluinos; an Effective Field Theory for the Stop Sector

Autor: Y. Yamada, Andreas Crivellin, Jason Aebischer, Christoph Greub

Publikováno v: European Physical Journal C
Aebischer, Jason; Crivellin, Andreas; Greub, Christoph; Yamada, Youichi (2017). The MSSM without gluinos; an effective field theory for the stop sector. European physical journal. C-particles and fields, 77(11), p. 740. EDP Sciences 10.1140/epjc/s10052-017-5318-3
European Physical Journal C: Particles and Fields, Vol 77, Iss 11, Pp 1-8 (2017)

In this article we study the MSSM with stops and Higgs scalars much lighter than gluinos and squarks of the first two generations. In this setup, one should use an effective field theory with partial supersymmetry in which the gluino and heavy squark

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d453fd3e62bfe9a43de8a9f0e541276c