arXiv subjects

C. Bruno

Publications and source records attributed to C. Bruno.

4 recordsLinked to original sources

arXiv2025

Nuclear Physics Mid Term Plan at LNGS

The Istituto Nazionale di Fisica Nucleare-Laboratori Nazionali del Gran Sasso (LNGS) is one of the largest underground physics laboratory, a very peculiar environment suited for experiments in Astroparticle Physics, Nuclear Physics and Fundamental Symmetries. The newly established Bellotti Ion Beam facility represents a major advance in the possibilities of studying nuclear processes in an underground environment. A workshop was organized at LNGS in the framework of the Nuclear Physics Mid Term Plan in Italy, an initiative of the Nuclear Physics Division of the Instituto Nazionale di Fisica Nucleare to discuss the opportunities that will be possible to study in the near future by employing state-of-the-art detection systems. In this report, a detailed discussion of the outcome of the workshop is presented.

nucl-ex↗

arXiv2018

Effect of beam energy straggling on resonant yield in thin gas targets: The cases $^{22}$Ne(p,{\gamma})$^{23}$Na and $^{14}$N(p,{\gamma})$^{15}$O

When deriving resonance strengths using the thick-target yield approximation, for very narrow resonances it may be necessary to take beam energy straggling into account. This applies to gas targets of a few keV width, especially if there is some additional structure in target stoichiometry or detection efficiency. The correction for this effect is shown and tested on recent studies of narrow resonances in the $^{22}$Ne(p,{\gamma})$^{23}$Na and $^{14}$N(p,{\gamma})$^{15}$O reactions.

nucl-ex↗

arXiv1995

$γγ\to π^0 π^0$ and $η\to π^0 γγ$ at low energy within the Extended Nambu Jona-Lasinio Model

Within the Extended Nambu Jona-Lasinio model, we calculate the $O(p^6)$ counterterms entering the low-energy expansion of the $γγ\to π^0 π^0$ and the $η\to π^0 γγ$ amplitudes in Chiral Perturbation Theory. For $γγ\to π^0 π^0$ our results are compatible with both the experimental data and the two-loop calculation using meson resonance saturation. For the $η$ decay we find $Γ(η\toπ^0 γγ)=0.58\pm 0.3$ eV which is in agreement with experiment within one standard deviation. We also give predictions for the neutral pion polarizabilities and compare them with the results obtained from resonance saturation.

hep-ph↗

arXiv1992

Rare Kaon Decays in the $1/N_c$-Expansion

We study the unknown coupling constants that appear at order $p^4$ in the Chiral Perturbation Theory analysis of $K \to πγ^* \to πl^+ l^-$, $K^{+-} \to π^{+-} γγ$ and $K \to ππγ$ decays. To that end, we compute the chiral realization of the $ΔS \, = \, 1$ Hamiltonian in the framework of the $1/N_c$-expansion of the low-energy action. The phenomenological implications are also discussed.

hep-ph↗