EFT at FASERν
| dc.contributor.author | Falkowski, Adam | en |
| dc.contributor.author | Gonzalez-Alonso, Martin | en |
| dc.contributor.author | Kopp, Joachim | en |
| dc.contributor.author | Soreq, Yotam | en |
| dc.contributor.author | Tabrizi, Zahra | en |
| dc.date.accessioned | 2022-03-23T12:26:34Z | en |
| dc.date.available | 2022-03-23T12:26:34Z | en |
| dc.date.issued | 2021-10-12 | en |
| dc.description.abstract | We investigate the sensitivity of the FASER nu detector to new physics in the form of non-standard neutrino interactions. FASER nu, which will be installed 480 m downstream of the ATLAS interaction point, will for the first time study interactions of multi-TeV neutrinos from a controlled source. Our formalism - which is applicable to any current and future neutrino experiment - is based on the Standard Model Effective Theory (SMEFT) and its counterpart, Weak Effective Field Theory (WEFT), below the electroweak scale. Starting from the WEFT Lagrangian, we compute the coefficients that modify neutrino production in meson decays and detection via deep-inelastic scattering, and we express the new physics effects in terms of modified flavor transition probabilities. For some coupling structures, we find that FASER nu will be able to constrain interactions that are two to three orders of magnitude weaker than Standard Model weak interactions, implying that the experiment will be indirectly probing new physics at the multi-TeV scale. In some cases, FASER nu constraints will become comparable to existing limits - some of them derived for the first time in this paper - already with 150 fb(-1) of data. | en |
| dc.description.notes | It is our great pleasure to thank Felix Kling for many useful discussions on the FASER experiment, for providing the neutrino fluxes in machine-readable form, and for invaluable comments on the manuscript. Moreover, we are grateful to Sacha Davidson for valuable advice on the calculation of mu - e conversion rates in nuclei. Two babies were born during the completion of this project, and we thank them for their understanding. AF has received funding from the Agence Nationale de la Recherche (ANR) under grant ANR-19- CE31-0012 (project MORA) and from the European Union's Horizon 2020 research and innovation programme under the Marie Sklodowska-Curie grant agreement No. 860881-HIDDeN. MGA is supported by the Generalitat Valenciana (Spain) through the plan GenT program (CIDEGENT/2018/014). JK's work has been partially supported by the European Research Council (ERC) under the European Union's Horizon 2020 research and innovation program (grant agreement No. 637506, "Directions"). YS is supported by the United States-Israel Binational Science Foundation (BSF) (NSF-BSF program grant No. 2018683), by the Israel Science Foundation (grant No. 482/20) and by the Azrieli foundation. YS is Taub fellow (supported by the Taub Family Foundation). ZT is supported by the U.S. Department of Energy under the award number DE-SC0020250. | en |
| dc.description.sponsorship | Agence Nationale de la Recherche (ANR)French National Research Agency (ANR) [ANR-19- CE31-0012]; European UnionEuropean Commission [860881-HIDDeN]; Generalitat Valenciana (Spain) through the plan GenT programGeneralitat Valenciana [CIDEGENT/2018/014]; European Research Council (ERC) under the European Union's Horizon 2020 research and innovation programEuropean Research Council (ERC) [637506]; United States-Israel Binational Science Foundation (BSF) (NSF-BSF program) [2018683]; Israel Science FoundationIsrael Science Foundation [482/20]; Azrieli foundation; Taub Family Foundation; U.S. Department of EnergyUnited States Department of Energy (DOE) [DE-SC0020250] | en |
| dc.description.version | Published version | en |
| dc.format.mimetype | application/pdf | en |
| dc.identifier.doi | https://doi.org/10.1007/JHEP10(2021)086 | en |
| dc.identifier.issn | 1029-8479 | en |
| dc.identifier.issue | 10 | en |
| dc.identifier.other | 86 | en |
| dc.identifier.uri | http://hdl.handle.net/10919/109427 | en |
| dc.language.iso | en | en |
| dc.rights | Creative Commons Attribution 4.0 International | en |
| dc.rights.uri | http://creativecommons.org/licenses/by/4.0/ | en |
| dc.subject | Effective Field Theories | en |
| dc.subject | Neutrino Physics | en |
| dc.title | EFT at FASERν | en |
| dc.title.serial | Journal of High Energy Physics | en |
| dc.type | Article - Refereed | en |
| dc.type.dcmitype | Text | en |
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