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Title: | Using supernova neutrinos to probe strange spin of proton with JUNO and THEIA |
Authors: | Chauhan, Bhavesh |
Keywords: | Physics High Energy Physics - Phenomenology (hep-ph) Supernova neutrinos |
Issue Date: | Nov-2022 |
Abstract: | The strange quark contribution to proton's spin (Δs) is a fundamental quantity that is poorly determined from current experiments. Neutrino-proton elastic scattering (pES) is a promising channel to measure this quantity, and requires an intense source of low-energy neutrinos and a low-threshold detector with excellent resolution. In this paper, we propose that neutrinos from a galactic supernova and their interactions with protons in large-volume scintillation detectors can be utilized to determine Δs. The spectra of all flavors of supernova neutrinos can be independently determined using a combination of DUNE and Super-(Hyper-)Kamiokande. This allows us to predict pES event rates in JUNO and THEIA, and estimate Δs by comparing with detected events. We find that the projected sensitivity for a supernova at 1 kpc (10 kpc), is approximately ±0.01 (±0.15). Interestingly, the limits from a nearby supernova would be comparable to the results from lattice QCD, and better than polarized deep-inelastic scattering experiments. Using supernova neutrinos provides a true Q2→0 measurement, and thus an axial-mass independent determination of Δs. |
URI: | https://arxiv.org/abs/2211.08443 http://dspace.bits-pilani.ac.in:8080/jspui/xmlui/handle/123456789/15289 |
Appears in Collections: | Department of Physics |
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