B-physics anomalies: a guide to combined explanations
Abstract Motivated by additional experimental hints of Lepton Flavour Universality violation in B decays, both in charged- and in neutral-current processes, we analyse the ingredients necessary to provide a combined description of these phenomena. By means of an Effective Field Theory (EFT) approach...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2017-11-01
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| Series: | Journal of High Energy Physics |
| Subjects: | |
| Online Access: | http://link.springer.com/article/10.1007/JHEP11(2017)044 |
| _version_ | 1819085584078995456 |
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| author | Dario Buttazzo Admir Greljo Gino Isidori David Marzocca |
| author_facet | Dario Buttazzo Admir Greljo Gino Isidori David Marzocca |
| author_sort | Dario Buttazzo |
| collection | DOAJ |
| description | Abstract Motivated by additional experimental hints of Lepton Flavour Universality violation in B decays, both in charged- and in neutral-current processes, we analyse the ingredients necessary to provide a combined description of these phenomena. By means of an Effective Field Theory (EFT) approach, based on the hypothesis of New Physics coupled predominantly to the third generation of left-handed quarks and leptons, we show how this is possible. We demonstrate, in particular, how to solve the problems posed by electroweak precision tests and direct searches with a rather natural choice of model parameters, within the context of a U(2) q ×U(2)ℓ flavour symmetry. We further exemplify the general EFT findings by means of simplified models with explicit mediators in the TeV range: coloured scalar or vector leptoquarks and colour-less vectors. Among these, the case of an SU(2) L -singlet vector leptoquark emerges as a particularly simple and successful framework. |
| first_indexed | 2024-12-21T21:06:40Z |
| format | Article |
| id | doaj.art-db22806309b248d39daac8a7ecbb5a38 |
| institution | Directory Open Access Journal |
| issn | 1029-8479 |
| language | English |
| last_indexed | 2024-12-21T21:06:40Z |
| publishDate | 2017-11-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of High Energy Physics |
| spelling | doaj.art-db22806309b248d39daac8a7ecbb5a382022-12-21T18:50:16ZengSpringerOpenJournal of High Energy Physics1029-84792017-11-0120171113410.1007/JHEP11(2017)044B-physics anomalies: a guide to combined explanationsDario Buttazzo0Admir Greljo1Gino Isidori2David Marzocca3Physik-Institut, Universität ZürichPhysik-Institut, Universität ZürichPhysik-Institut, Universität ZürichPhysik-Institut, Universität ZürichAbstract Motivated by additional experimental hints of Lepton Flavour Universality violation in B decays, both in charged- and in neutral-current processes, we analyse the ingredients necessary to provide a combined description of these phenomena. By means of an Effective Field Theory (EFT) approach, based on the hypothesis of New Physics coupled predominantly to the third generation of left-handed quarks and leptons, we show how this is possible. We demonstrate, in particular, how to solve the problems posed by electroweak precision tests and direct searches with a rather natural choice of model parameters, within the context of a U(2) q ×U(2)ℓ flavour symmetry. We further exemplify the general EFT findings by means of simplified models with explicit mediators in the TeV range: coloured scalar or vector leptoquarks and colour-less vectors. Among these, the case of an SU(2) L -singlet vector leptoquark emerges as a particularly simple and successful framework.http://link.springer.com/article/10.1007/JHEP11(2017)044Beyond Standard ModelHeavy Quark Physics |
| spellingShingle | Dario Buttazzo Admir Greljo Gino Isidori David Marzocca B-physics anomalies: a guide to combined explanations Journal of High Energy Physics Beyond Standard Model Heavy Quark Physics |
| title | B-physics anomalies: a guide to combined explanations |
| title_full | B-physics anomalies: a guide to combined explanations |
| title_fullStr | B-physics anomalies: a guide to combined explanations |
| title_full_unstemmed | B-physics anomalies: a guide to combined explanations |
| title_short | B-physics anomalies: a guide to combined explanations |
| title_sort | b physics anomalies a guide to combined explanations |
| topic | Beyond Standard Model Heavy Quark Physics |
| url | http://link.springer.com/article/10.1007/JHEP11(2017)044 |
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