New physics in b → sμμ: FCC-hh or a muon collider?
Abstract Rare flavour-changing neutral-current transitions b → sμ + μ − probe higher energy scales than what is directly accessible at the LHC. Therefore, the presence of new physics in such transitions, as suggested by the present-day LHCb anomalies, would have a major impact on the motivation and...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2022-10-01
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| Series: | Journal of High Energy Physics |
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| Online Access: | https://doi.org/10.1007/JHEP10(2022)149 |
| _version_ | 1811249861118394368 |
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| author | Aleksandr Azatov Francesco Garosi Admir Greljo David Marzocca Jakub Salko Sokratis Trifinopoulos |
| author_facet | Aleksandr Azatov Francesco Garosi Admir Greljo David Marzocca Jakub Salko Sokratis Trifinopoulos |
| author_sort | Aleksandr Azatov |
| collection | DOAJ |
| description | Abstract Rare flavour-changing neutral-current transitions b → sμ + μ − probe higher energy scales than what is directly accessible at the LHC. Therefore, the presence of new physics in such transitions, as suggested by the present-day LHCb anomalies, would have a major impact on the motivation and planning of future high-energy colliders. The two most prominent options currently debated are a proton-proton collider at 100 TeV (FCC-hh) and a multi-TeV muon collider (MuC). In this work, we compare the discovery prospects at these colliders on benchmark new physics models indirectly detectable in b → sμ + μ − decays but beyond the reach of the high-p T searches at the HL-LHC. We consider a comprehensive set of scenarios: semileptonic contact interactions, Z′ from a gauged U 1 B 3 − L μ $$ \textrm{U}{(1)}_{B_3-{L}_{\mu }} $$ and U 1 L μ − L τ $$ \textrm{U}{(1)}_{L_{\mu }-{L}_{\tau }} $$ , the scalar leptoquark S 3, and the vector leptoquark U 1. We find that a 3 TeV MuC has a sensitivity reach comparable to the one of the FCC-hh. However, for a heavy enough mediator, the new physics effects at a 3 TeV MuC are only observed indirectly via deviations in the highest energy bin, while the FCC-hh has a greater potential for the discovery of a resonance. Finally, to completely cover the parameter space suggested by the bsμμ anomalies, among the proposed future colliders, only a MuC of 10 TeV (or higher) can meet the challenge. |
| first_indexed | 2024-04-12T15:53:52Z |
| format | Article |
| id | doaj.art-50c699bd11594924b57d0c0a47763707 |
| institution | Directory Open Access Journal |
| issn | 1029-8479 |
| language | English |
| last_indexed | 2024-04-12T15:53:52Z |
| publishDate | 2022-10-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of High Energy Physics |
| spelling | doaj.art-50c699bd11594924b57d0c0a477637072022-12-22T03:26:25ZengSpringerOpenJournal of High Energy Physics1029-84792022-10-0120221015010.1007/JHEP10(2022)149New physics in b → sμμ: FCC-hh or a muon collider?Aleksandr Azatov0Francesco Garosi1Admir Greljo2David Marzocca3Jakub Salko4Sokratis Trifinopoulos5SISSA International School for Advanced StudiesSISSA International School for Advanced StudiesAlbert Einstein Center for Fundamental Physics, Institute for Theoretical Physics, University of BernINFN, Sezione di Trieste, SISSAAlbert Einstein Center for Fundamental Physics, Institute for Theoretical Physics, University of BernINFN, Sezione di Trieste, SISSAAbstract Rare flavour-changing neutral-current transitions b → sμ + μ − probe higher energy scales than what is directly accessible at the LHC. Therefore, the presence of new physics in such transitions, as suggested by the present-day LHCb anomalies, would have a major impact on the motivation and planning of future high-energy colliders. The two most prominent options currently debated are a proton-proton collider at 100 TeV (FCC-hh) and a multi-TeV muon collider (MuC). In this work, we compare the discovery prospects at these colliders on benchmark new physics models indirectly detectable in b → sμ + μ − decays but beyond the reach of the high-p T searches at the HL-LHC. We consider a comprehensive set of scenarios: semileptonic contact interactions, Z′ from a gauged U 1 B 3 − L μ $$ \textrm{U}{(1)}_{B_3-{L}_{\mu }} $$ and U 1 L μ − L τ $$ \textrm{U}{(1)}_{L_{\mu }-{L}_{\tau }} $$ , the scalar leptoquark S 3, and the vector leptoquark U 1. We find that a 3 TeV MuC has a sensitivity reach comparable to the one of the FCC-hh. However, for a heavy enough mediator, the new physics effects at a 3 TeV MuC are only observed indirectly via deviations in the highest energy bin, while the FCC-hh has a greater potential for the discovery of a resonance. Finally, to completely cover the parameter space suggested by the bsμμ anomalies, among the proposed future colliders, only a MuC of 10 TeV (or higher) can meet the challenge.https://doi.org/10.1007/JHEP10(2022)149Specific BSM PhenomenologyNew Gauge InteractionsBottom QuarksRare Decays |
| spellingShingle | Aleksandr Azatov Francesco Garosi Admir Greljo David Marzocca Jakub Salko Sokratis Trifinopoulos New physics in b → sμμ: FCC-hh or a muon collider? Journal of High Energy Physics Specific BSM Phenomenology New Gauge Interactions Bottom Quarks Rare Decays |
| title | New physics in b → sμμ: FCC-hh or a muon collider? |
| title_full | New physics in b → sμμ: FCC-hh or a muon collider? |
| title_fullStr | New physics in b → sμμ: FCC-hh or a muon collider? |
| title_full_unstemmed | New physics in b → sμμ: FCC-hh or a muon collider? |
| title_short | New physics in b → sμμ: FCC-hh or a muon collider? |
| title_sort | new physics in b sμμ fcc hh or a muon collider |
| topic | Specific BSM Phenomenology New Gauge Interactions Bottom Quarks Rare Decays |
| url | https://doi.org/10.1007/JHEP10(2022)149 |
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