Top-philic Z ′ forces at the LHC
Abstract Despite extensive searches for an additional neutral massive gauge boson at the LHC, a Z ′ at the weak scale could still be present if its couplings to the first two generations of quarks are suppressed, in which case the production in hadron colliders relies on tree-level processes in asso...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2018-03-01
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| Series: | Journal of High Energy Physics |
| Subjects: | |
| Online Access: | http://link.springer.com/article/10.1007/JHEP03(2018)074 |
| _version_ | 1818550701281771520 |
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| author | Patrick J. Fox Ian Low Yue Zhang |
| author_facet | Patrick J. Fox Ian Low Yue Zhang |
| author_sort | Patrick J. Fox |
| collection | DOAJ |
| description | Abstract Despite extensive searches for an additional neutral massive gauge boson at the LHC, a Z ′ at the weak scale could still be present if its couplings to the first two generations of quarks are suppressed, in which case the production in hadron colliders relies on tree-level processes in association with heavy flavors or one-loop processes in association with a jet. We consider the low-energy effective theory of a top-philic Z ′ and present possible UV completions. We clarify theoretical subtleties in evaluating the production of a top-philic Z ′ at the LHC and examine carefully the treatment of ananomalous Z ′ current in the low-energy effective theory. Recipes for properly computing the production rate in the Z ′ + j channel are given. We discuss constraints from colliders and low-energy probes of new physics. As an application, we apply these considerations to models that use a weak-scale Z ′ to explain possible violations of lepton universality in B meson decays, and show that the future running of a high luminosity LHC can potentially cover much of the remaining parameter space favored by this particular interpretation of the B physics anomaly. |
| first_indexed | 2024-12-12T08:49:59Z |
| format | Article |
| id | doaj.art-f2a268b2729a4eacbac09e81306248e8 |
| institution | Directory Open Access Journal |
| issn | 1029-8479 |
| language | English |
| last_indexed | 2024-12-12T08:49:59Z |
| publishDate | 2018-03-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of High Energy Physics |
| spelling | doaj.art-f2a268b2729a4eacbac09e81306248e82022-12-22T00:30:17ZengSpringerOpenJournal of High Energy Physics1029-84792018-03-012018313410.1007/JHEP03(2018)074Top-philic Z ′ forces at the LHCPatrick J. Fox0Ian Low1Yue Zhang2Theoretical Physics Department, FermilabHigh Energy Physics Division, Argonne National LaboratoryTheoretical Physics Department, FermilabAbstract Despite extensive searches for an additional neutral massive gauge boson at the LHC, a Z ′ at the weak scale could still be present if its couplings to the first two generations of quarks are suppressed, in which case the production in hadron colliders relies on tree-level processes in association with heavy flavors or one-loop processes in association with a jet. We consider the low-energy effective theory of a top-philic Z ′ and present possible UV completions. We clarify theoretical subtleties in evaluating the production of a top-philic Z ′ at the LHC and examine carefully the treatment of ananomalous Z ′ current in the low-energy effective theory. Recipes for properly computing the production rate in the Z ′ + j channel are given. We discuss constraints from colliders and low-energy probes of new physics. As an application, we apply these considerations to models that use a weak-scale Z ′ to explain possible violations of lepton universality in B meson decays, and show that the future running of a high luminosity LHC can potentially cover much of the remaining parameter space favored by this particular interpretation of the B physics anomaly.http://link.springer.com/article/10.1007/JHEP03(2018)074Anomalies in Field and String TheoriesBeyond Standard Model |
| spellingShingle | Patrick J. Fox Ian Low Yue Zhang Top-philic Z ′ forces at the LHC Journal of High Energy Physics Anomalies in Field and String Theories Beyond Standard Model |
| title | Top-philic Z ′ forces at the LHC |
| title_full | Top-philic Z ′ forces at the LHC |
| title_fullStr | Top-philic Z ′ forces at the LHC |
| title_full_unstemmed | Top-philic Z ′ forces at the LHC |
| title_short | Top-philic Z ′ forces at the LHC |
| title_sort | top philic z forces at the lhc |
| topic | Anomalies in Field and String Theories Beyond Standard Model |
| url | http://link.springer.com/article/10.1007/JHEP03(2018)074 |
| work_keys_str_mv | AT patrickjfox topphiliczforcesatthelhc AT ianlow topphiliczforcesatthelhc AT yuezhang topphiliczforcesatthelhc |