Zobrazeno 1 - 10
of 588
pro vyhledávání: '"Heavy neutrinos"'
Publikováno v:
Journal of High Energy Physics, Vol 2024, Iss 12, Pp 1-60 (2024)
Abstract Sixty years after the experimental discovery of CP violation in the quark sector, the existence of a similar CP violation in the lepton sector is still to be established. Actually, the structure of such a violation depends crucially on the o
Externí odkaz:
https://doaj.org/article/ad6cd760671f4fc88017e722fd029f9b
Publikováno v:
Journal of High Energy Physics, Vol 2024, Iss 11, Pp 1-28 (2024)
Abstract Collider-testable type I seesaw extensions of the Standard Model are generally protected by an approximate lepton number (LN) symmetry. Consequently, they predict pseudo-Dirac heavy neutral leptons (HNLs) composed of two nearly degenerate Ma
Externí odkaz:
https://doaj.org/article/2455736ace984119bd6495d7371cb94c
Autor:
Marco Ardu, Xabier Marcano
Publikováno v:
Journal of High Energy Physics, Vol 2024, Iss 10, Pp 1-23 (2024)
Abstract In this work we consider the Standard Model Effective Field Theory extended with right-handed neutrinos, the νSMEFT, and calculate the full set of one-loop anomalous dimensions that are proportional to Yukawa couplings. These contributions
Externí odkaz:
https://doaj.org/article/6ca81f73f1d24cf6b0a3218b3c871aa9
Publikováno v:
Journal of High Energy Physics, Vol 2024, Iss 10, Pp 1-12 (2024)
Abstract Stopped-pion experiments that measure coherent elastic neutrino-nucleus scattering (CEνNS) are sensitive to sterile neutrinos via disappearance. Using timing and energy spectra to perform flavor decomposition, we show that the delayed elect
Externí odkaz:
https://doaj.org/article/4997ac6397984ae2a46367f51eb395db
Publikováno v:
Journal of High Energy Physics, Vol 2024, Iss 10, Pp 1-20 (2024)
Abstract Dipole interactions between dark sector states or between a Standard Model particle and a dark state can efficiently be searched for via high-intensity fixed-target facilities. We propose to look for the associated mono-γ signature at the N
Externí odkaz:
https://doaj.org/article/68124d7a294d44c6bf1b28fc57b81828
Autor:
Pablo M. Candela, Valentina De Romeri, Pantelis Melas, Dimitrios K. Papoulias, Niki Saoulidou
Publikováno v:
Journal of High Energy Physics, Vol 2024, Iss 10, Pp 1-36 (2024)
Abstract We investigate the possible production of a MeV-scale sterile fermion through the up-scattering of neutrinos on nuclei and atomic electrons at different facilities. We consider a phenomenological model that adds a new fermion to the particle
Externí odkaz:
https://doaj.org/article/721a0498855d48f892a3e8677dcd0bd0
Autor:
Di Zhang
Publikováno v:
Journal of High Energy Physics, Vol 2024, Iss 10, Pp 1-21 (2024)
Abstract In this work, we revisit the one-loop renormalization group equations (RGEs) among non-degenerate seesaw scales, i.e., threshold effects in the canonical seesaw mechanism, which have been obtained for more than two decades. Different from th
Externí odkaz:
https://doaj.org/article/f688a0455f514b0e832863ae78f6faa2
Publikováno v:
Journal of High Energy Physics, Vol 2024, Iss 9, Pp 1-18 (2024)
Abstract In this paper, we would like to point out that in the scenario that the right-handed neutrinos suddenly gain some masses much larger than the temperature of the Universe at that time so that the washout effects for the lepton asymmetry gener
Externí odkaz:
https://doaj.org/article/af1e78921ec34658b2842df0517e4266
Autor:
W. Dekens, J. de Vries, D. Castillo, J. Menéndez, E. Mereghetti, V. Plakkot, P. Soriano, G. Zhou
Publikováno v:
Journal of High Energy Physics, Vol 2024, Iss 9, Pp 1-48 (2024)
Abstract We investigate neutrinoless double-beta decay (0νββ) in minimal extensions of the Standard Model of particle physics where gauge-singlet right-handed neutrinos give rise to Dirac and Majorana neutrino mass terms. We argue that the standar
Externí odkaz:
https://doaj.org/article/7a5932c796ca4391a8dfc618a7d77af6
Publikováno v:
Journal of High Energy Physics, Vol 2024, Iss 9, Pp 1-36 (2024)
Abstract Sterile neutrinos with masses at the keV scale and mixing to the active neutrinos offer an elegant explanation of the observed dark matter (DM) density. However, the very same mixing inevitably leads to radiative photon emission and the non-
Externí odkaz:
https://doaj.org/article/9ba741d04bba4daa8712265a5f84a768