Probing third-generation New Physics with K→πνν¯ and B→K(⁎)νν¯
The recent observation of the K+→π+νν¯ decay by NA62 is an important milestone in precision flavor physics. Together with evidence of B+→K+νν¯ reported by Belle-II, they are the only FCNC decays involving third-family leptons where a precision close to the SM expectation has been reached. We study t...
Saved in:
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2025-02-01
|
| Series: | Physics Letters B |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0370269325000553 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1823861225204744192 |
|---|---|
| author | L. Allwicher M. Bordone G. Isidori G. Piazza A. Stanzione |
| author_facet | L. Allwicher M. Bordone G. Isidori G. Piazza A. Stanzione |
| author_sort | L. Allwicher |
| collection | DOAJ |
| description | The recent observation of the K+→π+νν¯ decay by NA62 is an important milestone in precision flavor physics. Together with evidence of B+→K+νν¯ reported by Belle-II, they are the only FCNC decays involving third-family leptons where a precision close to the SM expectation has been reached. We study the implications of these recent results in the context of a new physics scenario aligned to the third generation, with an approximate U(2)5 flavor symmetry acting on the light families. We find that the slight excess observed in both channels supports the hypothesis of non-standard TeV dynamics of this type, as also hinted at by other B-meson decays, consistently with bounds from colliders and electroweak observables. We further discuss how future improvements in precision could affect this picture, highlighting the discovery potential in these di-neutrino modes. |
| format | Article |
| id | doaj-art-f505d4ee557f4a4ab679ead904eb7cfd |
| institution | Kabale University |
| issn | 0370-2693 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Physics Letters B |
| spelling | doaj-art-f505d4ee557f4a4ab679ead904eb7cfd2025-02-10T04:34:13ZengElsevierPhysics Letters B0370-26932025-02-01861139295Probing third-generation New Physics with K→πνν¯ and B→K(⁎)νν¯L. Allwicher0M. Bordone1G. Isidori2G. Piazza3A. Stanzione4Physik-Institut, Universität Zürich, CH-8057 Zürich, SwitzerlandTheoretical Physics Department, CERN, Geneva, SwitzerlandPhysik-Institut, Universität Zürich, CH-8057 Zürich, Switzerland; Corresponding author.Physik-Institut, Universität Zürich, CH-8057 Zürich, SwitzerlandINFN, Sezione di Trieste, SISSA, Via Bonomea 265, 34136, Trieste, Italy; SISSA International School for Advanced Studies, Via Bonomea 265, 34136, Trieste, ItalyThe recent observation of the K+→π+νν¯ decay by NA62 is an important milestone in precision flavor physics. Together with evidence of B+→K+νν¯ reported by Belle-II, they are the only FCNC decays involving third-family leptons where a precision close to the SM expectation has been reached. We study the implications of these recent results in the context of a new physics scenario aligned to the third generation, with an approximate U(2)5 flavor symmetry acting on the light families. We find that the slight excess observed in both channels supports the hypothesis of non-standard TeV dynamics of this type, as also hinted at by other B-meson decays, consistently with bounds from colliders and electroweak observables. We further discuss how future improvements in precision could affect this picture, highlighting the discovery potential in these di-neutrino modes.http://www.sciencedirect.com/science/article/pii/S0370269325000553 |
| spellingShingle | L. Allwicher M. Bordone G. Isidori G. Piazza A. Stanzione Probing third-generation New Physics with K→πνν¯ and B→K(⁎)νν¯ Physics Letters B |
| title | Probing third-generation New Physics with K→πνν¯ and B→K(⁎)νν¯ |
| title_full | Probing third-generation New Physics with K→πνν¯ and B→K(⁎)νν¯ |
| title_fullStr | Probing third-generation New Physics with K→πνν¯ and B→K(⁎)νν¯ |
| title_full_unstemmed | Probing third-generation New Physics with K→πνν¯ and B→K(⁎)νν¯ |
| title_short | Probing third-generation New Physics with K→πνν¯ and B→K(⁎)νν¯ |
| title_sort | probing third generation new physics with k πνν¯ and b k νν¯ |
| url | http://www.sciencedirect.com/science/article/pii/S0370269325000553 |
| work_keys_str_mv | AT lallwicher probingthirdgenerationnewphysicswithkpnnandbknn AT mbordone probingthirdgenerationnewphysicswithkpnnandbknn AT gisidori probingthirdgenerationnewphysicswithkpnnandbknn AT gpiazza probingthirdgenerationnewphysicswithkpnnandbknn AT astanzione probingthirdgenerationnewphysicswithkpnnandbknn |