M3: a new muon missing momentum experiment to probe (g − 2) μ and dark matter at Fermilab
Abstract New light, weakly-coupled particles are commonly invoked to address the persistent ∼ 4σ anomaly in (g−2) μ and serve as mediators between dark and visible matter. If such particles couple predominantly to heavier generations and decay invisibly, much of their best-motivated parameter space...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2018-09-01
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| Series: | Journal of High Energy Physics |
| Subjects: | |
| Online Access: | http://link.springer.com/article/10.1007/JHEP09(2018)153 |
| _version_ | 1818962932874084352 |
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| author | Yonatan Kahn Gordan Krnjaic Nhan Tran Andrew Whitbeck |
| author_facet | Yonatan Kahn Gordan Krnjaic Nhan Tran Andrew Whitbeck |
| author_sort | Yonatan Kahn |
| collection | DOAJ |
| description | Abstract New light, weakly-coupled particles are commonly invoked to address the persistent ∼ 4σ anomaly in (g−2) μ and serve as mediators between dark and visible matter. If such particles couple predominantly to heavier generations and decay invisibly, much of their best-motivated parameter space is inaccessible with existing experimental techniques. In this paper, we present a new fixed-target, missing-momentum search strategy to probe invisibly decaying particles that couple preferentially to muons. In our setup, a relativistic muon beam impinges on a thick active target. The signal consists of events in which a muon loses a large fraction of its incident momentum inside the target without initiating any detectable electromagnetic or hadronic activity in downstream veto systems. We propose a two-phase experiment, M3 (Muon Missing Momentum), based at Fermilab. Phase 1 with ∼ 1010 muons on target can test the remaining parameter space for which light invisibly-decaying particles can resolve the (g − 2) μ anomaly, while Phase 2 with ∼ 1013 muons on target can test much of the predictive parameter space over which sub-GeV dark matter achieves freeze-out via muon-philic forces, including gauged U(1) Lμ−Lτ . |
| first_indexed | 2024-12-20T12:37:11Z |
| format | Article |
| id | doaj.art-8fc602d5b99542e7b2e7ae3c4c41667e |
| institution | Directory Open Access Journal |
| issn | 1029-8479 |
| language | English |
| last_indexed | 2024-12-20T12:37:11Z |
| publishDate | 2018-09-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of High Energy Physics |
| spelling | doaj.art-8fc602d5b99542e7b2e7ae3c4c41667e2022-12-21T19:40:35ZengSpringerOpenJournal of High Energy Physics1029-84792018-09-012018913210.1007/JHEP09(2018)153M3: a new muon missing momentum experiment to probe (g − 2) μ and dark matter at FermilabYonatan Kahn0Gordan Krnjaic1Nhan Tran2Andrew Whitbeck3Princeton UniversityFermi National Accelerator LaboratoryFermi National Accelerator LaboratoryFermi National Accelerator LaboratoryAbstract New light, weakly-coupled particles are commonly invoked to address the persistent ∼ 4σ anomaly in (g−2) μ and serve as mediators between dark and visible matter. If such particles couple predominantly to heavier generations and decay invisibly, much of their best-motivated parameter space is inaccessible with existing experimental techniques. In this paper, we present a new fixed-target, missing-momentum search strategy to probe invisibly decaying particles that couple preferentially to muons. In our setup, a relativistic muon beam impinges on a thick active target. The signal consists of events in which a muon loses a large fraction of its incident momentum inside the target without initiating any detectable electromagnetic or hadronic activity in downstream veto systems. We propose a two-phase experiment, M3 (Muon Missing Momentum), based at Fermilab. Phase 1 with ∼ 1010 muons on target can test the remaining parameter space for which light invisibly-decaying particles can resolve the (g − 2) μ anomaly, while Phase 2 with ∼ 1013 muons on target can test much of the predictive parameter space over which sub-GeV dark matter achieves freeze-out via muon-philic forces, including gauged U(1) Lμ−Lτ .http://link.springer.com/article/10.1007/JHEP09(2018)153Fixed target experiments |
| spellingShingle | Yonatan Kahn Gordan Krnjaic Nhan Tran Andrew Whitbeck M3: a new muon missing momentum experiment to probe (g − 2) μ and dark matter at Fermilab Journal of High Energy Physics Fixed target experiments |
| title | M3: a new muon missing momentum experiment to probe (g − 2) μ and dark matter at Fermilab |
| title_full | M3: a new muon missing momentum experiment to probe (g − 2) μ and dark matter at Fermilab |
| title_fullStr | M3: a new muon missing momentum experiment to probe (g − 2) μ and dark matter at Fermilab |
| title_full_unstemmed | M3: a new muon missing momentum experiment to probe (g − 2) μ and dark matter at Fermilab |
| title_short | M3: a new muon missing momentum experiment to probe (g − 2) μ and dark matter at Fermilab |
| title_sort | m3 a new muon missing momentum experiment to probe g 2 μ and dark matter at fermilab |
| topic | Fixed target experiments |
| url | http://link.springer.com/article/10.1007/JHEP09(2018)153 |
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