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of 166
pro vyhledávání: '"Tome, G"'
We compute the branching fractions of vector quarkonia ($V_Q=J/\psi, \psi', \Upsilon(nS)$) decays into neutrino pairs, considering both Dirac and Majorana types, within the Standard Model (SM) and beyond. The vector nature of quarkonium states yields
Externí odkaz:
http://arxiv.org/abs/2411.09124
New heavy neutral leptons lead to non-unitary effects in models for neutrino masses. Such effects could represent a sign of new physics beyond the Standard Model, leading to observable deviations in neutrino oscillation experiments, lepton flavor vio
Externí odkaz:
http://arxiv.org/abs/2408.13232
We revisited the computation of the cross section for the $\mu^-\mu^-\to \ell^-\ell^{-}$ $(\ell^-=\tau^-,\, e^-)$ transitions in the presence of new heavy Majorana neutrinos. We focus on scenarios where the masses of the new states are around some fe
Externí odkaz:
http://arxiv.org/abs/2405.02819
We examine the parameter space region of the inverse seesaw model that is consistent with neutrino oscillation data. We focus on the correlation between the current limits from the search of the $\mu\to e\gamma$ lepton flavor violating decay and the
Externí odkaz:
http://arxiv.org/abs/2302.07379
Searches for $\Delta L=2$ decays are crucial to disentangle the Dirac vs Majorana nature of neutrinos. While neutrinoless nuclear double beta decays are the most promising tool to look for di-electron signals of $\Delta L=2$, searches of di-lepton ch
Externí odkaz:
http://arxiv.org/abs/2112.02227
Publikováno v:
JHEP02(2022)173
We calculate the ratios $R_{\tau / P}\equiv \Gamma \left( \tau \to P \nu_{\tau}[\gamma] \right) / \Gamma \left(P\to \mu \nu_{\mu}[\gamma]\right)$ ($P=\pi,K$) at one loop following a large-$N_C$ expansion where Chiral Perturbation Theory is enlarged b
Externí odkaz:
http://arxiv.org/abs/2112.01859
Publikováno v:
Phys. Rev. D 104, L091502 2021
The ratios $R_{\tau/P}\equiv \Gamma(\tau \to P \nu_\tau [\gamma]) / \Gamma(P \to\mu \nu_\mu[\gamma])$ ($P=\pi, K$) provide sensitive tests of lepton universality $\left|g_\tau/g_\mu\right|=1$ and are a useful tool for new physics searches. The radiat
Externí odkaz:
http://arxiv.org/abs/2107.04603
Publikováno v:
Phys. Rev. D 102, 113006 (2020)
The presence of massive sterile neutrinos $N$ mixed with the active ones induces flavor violating processes in the charged lepton sector at the loop level. In particular, the amplitude of $H^0\to \bar{\ell}_i\ell_j$ is expected to be proportional to
Externí odkaz:
http://arxiv.org/abs/2005.11234
Publikováno v:
Phys. Rev. D 101, 075020 (2020)
The observation of lepton flavor violating processes at colliders could be a clear signal of a non-minimal neutrino sector. We define a 5-parameter model with a pair of TeV fermion singlets and arbitrary mixings with the three active neutrino flavors
Externí odkaz:
http://arxiv.org/abs/1912.13327
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