Zobrazeno 1 - 10
of 6 397
pro vyhledávání: '"VIVIANI M"'
The present work deals with the e+ e- pair production in the d(p,e+e-)3He and d(n,e+ e-)3H processes, in order to evidentiate possible effects due to the exchange of a hypothetical low-mass boson, the so-called X17. These processes are studied for en
Externí odkaz:
http://arxiv.org/abs/2408.16744
Autor:
Garrido, E., Kievsky, A., Gattobigio, M., Viviani, M., Marcucci, L. E., Del Grande, R., Fabbietti, L., Melnichenko, D.
In this work we present the study of $p\Lambda$ and $pp\Lambda$ scattering processes using femtoscopic correlation functions. This observable has been recently used to access the low-energy interaction of hadrons emitted in the final state of high-en
Externí odkaz:
http://arxiv.org/abs/2408.01750
The 4He monopole form factor is studied by computing the transition matrix element of the electromagnetic charge operator between the 4He ground-state and the p+3H and n+3He scattering states. The nuclear wave functions are calculated using the hyper
Externí odkaz:
http://arxiv.org/abs/2406.00653
Autor:
Viviani, M., Baeßler, S., Barrón-Palos, L., Birge, N., Bowman, J. D., Calarco, J., Cianciolo, V., Coppola, C. E., Crawford, C. B., Dodson, G., Fomin, N., Garishvili, I., Gericke, M. T., Girlanda, L., Greene, G. L., Hale, G. M., Hamblen, J., Hayes, C., Iverson, E. B., Kabir, M. L., Kievsky, A., Marcucci, L. E., McCrea, M., Plemons, E., Ramírez-Morales, A., Mueller, P. E., Novikov, I., Penttila, S. I., Scott, E. M., Watts, J., Wickersham, C.
Recently, the n$^3$He collaboration reported a measurement of the parity-violating (PV) proton directional asymmetry $A_{\mathrm {PV}} = (1.55\pm 0.97~\mathrm {(st\ at)} \pm 0.24~\mathrm {(sys)})\times 10^{-8}$ in the capture reaction of ${}^3$He$(\v
Externí odkaz:
http://arxiv.org/abs/2405.10258
Starting from a complete set of relativistic nucleon-nucleon contact operators up to order $O(p^4)$ of the expansion in the soft (relative or nucleon) momentum $p$, we show that non-relativistic expansions of relativistic operators involve twenty-six
Externí odkaz:
http://arxiv.org/abs/2404.11359
Autor:
Filandri, E., Viviani, M.
We study dark matter, assumed to be composed by weak interacting massive particles (WIMPs), scattering off ${}^2$H and ${}^4$He nuclei. In order to parameterize the WIMP-nucleon interaction the chiral effective field theory approach is used. Consider
Externí odkaz:
http://arxiv.org/abs/2403.06599
The correlation function is a useful tool to study the interaction between hadrons. The theoretical description of this observable requires the knowledge of the scattering wave function, whose asymptotic part is distorted when two or more particles a
Externí odkaz:
http://arxiv.org/abs/2402.06317
Autor:
Coraggio, L., Itaco, N., De Gregorio, G., Gargano, A., Cheng, Z. H., Ma, Y. Z., Xu, F. R., Viviani, M.
For the first time, we approach in this work the problem of the renormalization of the Gamow-Teller decay operator for nuclear shell-model calculations by way of many-body perturbation theory, starting from a nuclear Hamiltonian and electroweak curre
Externí odkaz:
http://arxiv.org/abs/2310.16133
Scattering experiments with three free nucleons in the ingoing channel are extremely challenging in terrestrial laboratories. Recently, the ALICE Collaboration has successfully measured the scattering of three protons indirectly, by using the femtosc
Externí odkaz:
http://arxiv.org/abs/2310.10428
Correlation functions of hadrons can be accessed in high-energy collisions of atomic nuclei, revealing information about the underlying interaction. This work complements experimental efforts to study nucleon-deuteron $Nd$ -- with $N=p$ (proton) or $
Externí odkaz:
http://arxiv.org/abs/2306.02478