F. Loparco

activity

19992026

most citedFermi Large Area Telescope Fourth Source Catalog

1.4k citations · 40.7k across the 254 of their papers we have counts for

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hep-ph2024

Inclusive rare $Λ_{b}$ decays to photon

Francesco Loparco

Inclusive $H_{b} \to X_{s} γ$ decays, with $H_{b}$ a beauty baryon, are treated exploiting an expansion up to the third order in the inverse of the $b$ quark mass $m_{b}$ and to LO in $…

hep-ph2024

Constraining $ν$ SMEFT coefficients: the case of the extra $U (1)^{'}$

Pietro Colangelo, Fulvia De Fazio, Francesco Loparco +1

We study the constraints on low-energy coefficients of the $ν$ SMEFT generalization of the Standard Model effective theory in the simple case of a $U (1)^{'}$ enlargement o…

hep-ph2024

A new look at $b \to s$ observables in 331 models

Francesco Loparco

Flavour changing neutral current (FCNC) processes are described by loop diagrams in the Standard Model (SM), while in 331 models, based on the gauge group $\text{SU}(3)_C \times \t…

hep-ph2024

Flavour anomalies, correlations, hadronic uncertainties, and all that

Pietro Colangelo, Fulvia De Fazio, Francesco Loparco +1

We present a short overview of the so-called flavour anomalies, discussing their significance and the connections with QCD issues discussed at the HADRON 2023 conference.

hep-ph2024

New Physics couplings from angular coefficient functions of $B ˉ \to D^{*} (D π) ℓ ν ˉ_{ℓ}$

Pietro Colangelo, Fulvia De Fazio, Francesco Loparco +1

The Belle Collaboration has recently measured the complete set of angular coefficient functions for the exclusive decays $B ˉ \to D^{*} (D π) ℓ ν ˉ_{ℓ}$ , with $ℓ = e, μ$ ,…

hep-ph2023

Dalitz decays $D_{s J}^{()} \to D_{s}^{()} ℓ^{+} ℓ^{-}$

Pietro Colangelo, Fulvia De Fazio, Francesco Loparco +1

The Dalitz decays of the positive parity $D_{s J}^{(*)}$ charmed mesons, $D_{s J}^{(*)} \to D_{s}^{(*)} ℓ^{+} ℓ^{-}$ with $J = 0, 1, 2$ and $ℓ = e, μ$ , are important processes to invest…

hep-ph2023

On the decay mode $Λ_{b} \to X_{s} γ$

P. Colangelo, F. De Fazio, F. Loparco

We study the inclusive $H_{b} \to X_{s} γ$ decay with $H_{b}$ a beauty baryon, in particular $Λ_{b}$ , employing an expansion in the heavy quark mass at $O (m_{b}^{- 3})$ at leading or…

hep-ph2022

Investigating $B_{c}$ semileptonic decays

Francesco Loparco

I present analyses of semileptonic $B_{c}$ decays. I first discuss the decays induced by $c \to {s, d}$ transitions, in particular $B_{c} \to B_{a} ℓ ˉ ν_{ℓ}$ and $B_c \…

hep-ph2022

Inclusive $b \to {u, c} ℓ^{-} ν ˉ_{ℓ}$ modes: polarized/unpolarized $Λ_{b}$

Francesco Loparco

The increasing number of flavour anomalies motivates the investigation of new processes where tensions similar to the observed ones may emerge. It is necessary to identify observab…

hep-ph2022★ 6 cited

Semileptonic $B_{c}$ decays to $P -$ wave charmonium and the nature of $χ_{c 1} (3872)$

P. Colangelo, F. De Fazio, N. Losacco +2

The hadronic form factors of $B_{c}$ semileptonic decays to the $P -$ wave charmonium 4-plet can be expressed near the zero-recoil point in terms of universal functions, performing a s…

hep-ph2022★ 11 cited

Relations among $B_{c} \to J / ψ, η_{c}$ form factors

P. Colangelo, F. De Fazio, F. Loparco +2

We analyze the form factors parametrizing the $B_{c} \to J / ψ, η_{c}$ matrix elements of the operators in a generalized low-energy $b \to c$ semileptonic Hamiltonian. We consider an exp…

hep-ph2021

Probing New Physics with heavy hadron decays

Pietro Colangelo, Fulvia De Fazio, Francesco Loparco

The increasing number of flavour anomalies calls for the investigation of new processes where tensions similar to the observed ones could emerge. Observables sensitive to physics b…

hep-ph2021

The charm of 331

Andrzej J. Buras, Pietro Colangelo, Fulvia De Fazio +1

We perform a detailed analysis of flavour changing neutral current processes in the charm sector in the context of 331 models. As pointed out recently, in the case of $Z^{'}$ co…

hep-ph2021★ 1 cited

$c \to uν ν ˉ$ transitions of $B_{c}$ mesons: 331 model facing Standard Model null tests

Pietro Colangelo, Fulvia De Fazio, Francesco Loparco

The Glashow-Iliopoulos-Maiani mechanism is extremely efficient to suppress the flavour-changing neutral current decays of charmed hadrons induced by the $c \to u$ transitions, maki…

hep-ph2021★ 18 cited

Role of $B_{c}^{+} \to B_{s, d}^{(*)} ℓ ˉ ν_{ℓ}$ in the Standard Model and in the search for BSM signals

P. Colangelo, F. De Fazio, F. Loparco

The decays $B_{c}^{+} \to B_{a} ℓ ˉ ν_{ℓ}$ and $B_{c}^{+} \to B_{a}^{*} (\to B_{a} γ) ℓ ˉ ν_{ℓ}$ , with $a = s, d$ and $ℓ = e, μ$ , are studied in the Standard Model (SM) and in the…

hep-ph2020★ 33 cited

Inclusive semileptonic $Λ_{b}$ decays in the Standard Model and beyond

Pietro Colangelo, Fulvia De Fazio, Francesco Loparco

Inclusive semileptonic decays of beauty baryons are studied using the heavy quark expansion to $O (1/ m_{b}^{3})$ , at leading order in $α_{s}$ . The case of a polarized decaying bary…

hep-ph2019★ 31 cited

Probing New Physics with $B ˉ \to ρ (770) ℓ^{-} ν ˉ_{ℓ}$ and $B ˉ \to a_{1} (1260) ℓ^{-} ν ˉ_{ℓ}$

P. Colangelo, F. De Fazio, F. Loparco

The $B$ meson semileptonic modes to $ρ (770)$ and $a_{1} (1260)$ are useful to pin down possible non Standard Model effects. The 4d differential $B ˉ \to ρ (π π) ℓ^{-} ν ˉ_{ℓ}$ …

hep-ph2018★ 39 cited

Configurational Entropy can disentangle conventional hadrons from exotica

P. Colangelo, F. Loparco

We evaluate the Configurational Entropy (CE) for scalar mesons and for $J^{P} = \frac{1}{2}^{+}$ baryons in a holographic approach, varying the dimension of boundary theory operators and…

hep-ph2002★ 9 cited

Search for cosmic ray sources using muons detected by the MACRO experiment

M. Ambrosio

The MACRO underground detector at Gran Sasso Laboratory recorded 60 million secondary cosmic ray muons from February 1989 until December 2000. Different techniques were used to ana…

Inclusive rare Λb​ decays to photon

Constraining νSMEFT coefficients: the case of the extra U(1)′

A new look at b→s observables in 331 models

Flavour anomalies, correlations, hadronic uncertainties, and all that

New Physics couplings from angular coefficient functions of Bˉ→D∗(Dπ)ℓνˉℓ​

Dalitz decays DsJ(∗)​→Ds(∗)​ℓ+ℓ−

On the decay mode Λb​→Xs​γ

Investigating Bc​ semileptonic decays

Inclusive b→{u,c}ℓ−νˉℓ​ modes: polarized/unpolarized Λb​

Semileptonic Bc​ decays to P−wave charmonium and the nature of χc1​(3872)

Relations among Bc​→J/ψ,ηc​ form factors

Probing New Physics with heavy hadron decays

The charm of 331

c→uννˉ transitions of Bc​ mesons: 331 model facing Standard Model null tests

Role of Bc+​→Bs,d(∗)​ℓˉνℓ​ in the Standard Model and in the search for BSM signals

Inclusive semileptonic Λb​ decays in the Standard Model and beyond

Probing New Physics with Bˉ→ρ(770)ℓ−νˉℓ​ and Bˉ→a1​(1260)ℓ−νˉℓ​

Configurational Entropy can disentangle conventional hadrons from exotica

Search for cosmic ray sources using muons detected by the MACRO experiment

Inclusive rare $Λ_{b}$ decays to photon

Constraining $ν$ SMEFT coefficients: the case of the extra $U (1)^{'}$

A new look at $b \to s$ observables in 331 models

New Physics couplings from angular coefficient functions of $B ˉ \to D^{*} (D π) ℓ ν ˉ_{ℓ}$

Dalitz decays $D_{s J}^{()} \to D_{s}^{()} ℓ^{+} ℓ^{-}$

On the decay mode $Λ_{b} \to X_{s} γ$

Investigating $B_{c}$ semileptonic decays

Inclusive $b \to {u, c} ℓ^{-} ν ˉ_{ℓ}$ modes: polarized/unpolarized $Λ_{b}$

Semileptonic $B_{c}$ decays to $P -$ wave charmonium and the nature of $χ_{c 1} (3872)$

Relations among $B_{c} \to J / ψ, η_{c}$ form factors

$c \to uν ν ˉ$ transitions of $B_{c}$ mesons: 331 model facing Standard Model null tests

Role of $B_{c}^{+} \to B_{s, d}^{(*)} ℓ ˉ ν_{ℓ}$ in the Standard Model and in the search for BSM signals

Inclusive semileptonic $Λ_{b}$ decays in the Standard Model and beyond

Probing New Physics with $B ˉ \to ρ (770) ℓ^{-} ν ˉ_{ℓ}$ and $B ˉ \to a_{1} (1260) ℓ^{-} ν ˉ_{ℓ}$