P. Roig

activity

20072023

most citedThe anomalous magnetic moment of the muon in the Standard Model

1.2k citations · 3.5k across the 74 of their papers we have counts for

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hep-ph2023★ 24 cited

$τ$ data-driven evaluation of Euclidean windows for the hadronic vacuum polarization

Pere Masjuan, Alejandro Miranda, Pablo Roig

We compute for the first time the $τ$ data-driven Euclidean windows for the hadronic vacuum polarization contribution to the muon $g - 2$ . We show that $τ$ -based results agree with t…

hep-ph2023★ 3 cited

Dirac-Majorana neutrinos distinction in four-body decays

Juan Manuel Márquez, Diego Portillo-Sánchez, Pablo Roig

A novel method to differentiate the effects of Dirac and Majorana (D-M) neutrinos in four-body decays has been discussed in arXiv:2106.11785. There, it is concluded that the back-t…

hep-ph2023★ 10 cited

Lepton Flavor Violation from diphoton effective interactions

Fabiola Fortuna, Xabier Marcano, Marcela Marín +1

We consider charged lepton flavor violating transitions mediated by the diphoton effective interactions $ℓ_{i} ℓ_{j} γ γ$ and explore which processes can probe them better. Our anal…

hep-ph2023★ 2 cited

Radiative corrections to the $τ^{-} \to (P_{1} P_{2})^{-} ν_{τ}$ ( $P_{1, 2} = π, K$ ) decays

Rafel Escribano, Alejandro Miranda, Pablo Roig

The radiative corrections to the $τ^{-} \to (P_{1} P_{2})^{-} ν_{τ}$ ( $P_{1, 2} = π, K$ ) decays are calculated for the first time including the structure-dependent real photon corrections, which a…

hep-ph2022★ 9 cited

Tension between $e^{+} e^{-} \to η π^{-} π^{+}$ and $τ^{-} \to η π^{-} π^{0} ν_{τ}$ data and non-standard interactions

Saray Arteaga, Ling-Yun Dai, Adolfo Guevara +1

We show the discrepancy between the isospin-rotated $e^{+} e^{-} \to η π^{-} π^{+}$ cross-section -- measured by various collaborations -- and the Belle $τ^{-} \to η π^{-} π^{0} ν_{τ}$ spectrum, which canno…

hep-ph2022★ 11 cited

Indirect upper limits on $ℓ_{i} \to ℓ_{j} γ γ$ from $ℓ_{i} \to ℓ_{j} γ$

Fabiola Fortuna, Alejandro Ibarra, Xabier Marcano +2

We perform an effective field theory analysis to correlate the charged lepton flavor violating processes $ℓ_{i} \to ℓ_{j} γ γ$ and $ℓ_{i} \to ℓ_{j} γ$ . Using the current upper bounds…

hep-ph2022★ 3 cited

Lepton Flavour Violation in Hadron Decays of the Tau Lepton within the Littlest Higgs Model with T-parity

Iván Pacheco, Pablo Roig

We first study the hadronic lepton flavor violating tau decays within the littlest Higgs model with T-parity (including one or two pseudoscalars, or a vector resonance). We conside…

hep-ph2022★ 2 cited

Impact of ATLAS constraints on effective dark matter-standard model interactions with spin-one mediators

Fabiola Fortuna, Pablo Roig

We complement a previous work \cite{Fortuna:2020wwx} using an EFT framework of dark matter and standard model interactions, with spin-one mediators, exploring a wider dark matter m…

hep-ph2022★ 11 cited

Michel parameters in the presence of massive Dirac and Majorana neutrinos

Juan Manuel Márquez, Gabriel López Castro, Pablo Roig

We analyse the effects of Dirac and Majorana neutrinos on leptonic decays of muon and tau leptons using the most general four-lepton effective interaction Hamiltonian of dimension…

hep-ph2022★ 7 cited

Lepton flavor violation within the Simplest Little Higgs model

Enrique Ramirez, Pablo Roig

We carry out an exhaustive analysis of lepton flavor violating processes within the Simplest Little Higgs model. Its discovery could be expected from either $μ \to e$ conversion in…

hep-ph2022

Dyson-Schwinger equations and the muon g-2

Khépani Raya, Adnan Bashir, Ángel S. Miramontes +1

We present a brief introduction to the Dyson-Schwinger equations (DSEs) approach to hadron and high-energy physics. In particular, how this formalism is applied to calculate the el…

hep-ph2022

Prospects for precise predictions of $a_{μ}$ in the Standard Model

G. Colangelo, M. Davier, A. X. El-Khadra +79

We discuss the prospects for improving the precision on the hadronic corrections to the anomalous magnetic moment of the muon, and the plans of the Muon $g - 2$ Theory Initiative to…

hep-ph2021

Exclusive hadronic $τ$ decays, within $&$ beyond the Standard Model

P. Roig

Semileptonic exclusive tau decays in the Standard Model are reviewed. As it is well-known, they are a privileged arena to learn about low-energy hadronization. They also allow for…

hep-ph2021★ 34 cited

Pion and Kaon box contribution to $a_{μ}^{HLbL}$

Ángel Miramontes, Adnan Bashir, Khépani Raya +1

We present an evaluation of the $π^{\pm}$ and $K^{\pm}$ box contributions to the hadronic light-by-light piece of the muon's anomalous magnetic moment, $a_{μ}$ . The calculation of the co…

hep-ph2021★ 15 cited

One-loop determination of $τ \to π (K) ν_{τ} [γ]$ branching ratios and new physics tests

M. A. Arroyo-Ureña, G. Hernández-Tomé, G. López-Castro +2

We calculate the ratios $R_{τ / P} \equiv Γ (τ \to P ν_{τ} [γ]) /Γ (P \to μ ν_{μ} [γ])$ ( $P = π, K$ ) at one loop following a large- $N_{C}$ expansion where Chiral Perturbatio…

hep-ph2021★ 5 cited

Improved description of di-lepton production in $τ^{-} \to ν_{τ} P^{-}$ decays

Adolfo Guevara, Gabriel López Castro, Pablo Roig

Recently, the Belle collaboration reported the first measurements of the $τ^{-} \to ν_{τ} π^{-} e^{+} e^{-}$ branching fraction and the spectrum of the pion-dielectron system. In an analysis pre…

hep-ph2021★ 14 cited

Flavor violating muon decay into an electron and a light gauge boson

Alejandro Ibarra, Marcela Marín, Pablo Roig

We analyze the flavor violating muon decay $μ \to eχ$ , where $χ$ is a massive gauge boson, with emphasis in the regime where $χ$ is ultralight. We first study this process f…

hep-ph2021★ 10 cited

Axial-vector exchange contribution to the Hyperfine Splitting

Alejandro Miranda, Pablo Roig, Pablo Sanchez-Puertas

We revisit the contribution of axial-vector mesons to the hyperfine splitting of muonic hydrogen. We focus our attention on the doubly-virtual asymptotic behavior of the relevant f…

hep-ph2021★ 10 cited

Lepton flavor violation in the Littlest Higgs Model with T parity realizing an inverse seesaw

Iván Pacheco, Pablo Roig

We study lepton flavor violation (LFV) within the Littlest Higgs Model with T parity (LHT) realizing an inverse seesaw (ISS) mechanism of type I. With respect to the traditional LH…

hep-ph2021★ 29 cited

Radiative corrections to $τ \to π (K) ν_{τ} [γ]$ : a reliable new physics test

M. A. Arroyo-Ureña, G. Hernández-Tomé, G. López-Castro +2

The ratios $R_{τ / P} \equiv Γ (τ \to P ν_{τ} [γ]) /Γ (P \to μ ν_{μ} [γ])$ ( $P = π, K$ ) provide sensitive tests of lepton universality $∣ g_{τ} / g_{μ} ∣ = 1$ and are a useful tool for new physi…

hep-ph2020★ 8 cited

Lepton-pair production in di-pion $τ$ lepton decays

J. L. Gutiérrez Santiago, G. López Castro, P. Roig

We study the $τ^{-} \to ν_{τ} π^{-} π^{0} ℓ^{+} ℓ^{-}$ ( $ℓ = e, μ$ ) decays, which are $O (α^{2})$ -suppressed with respect to the dominant di-pion tau decay channel. Both the inner-br…

hep-ph2020★ 9 cited

Effective field theory analysis of dark matter-standard model interactions with spin one mediators

Fabiola Fortuna, Pablo Roig, José Wudka

We analyze interactions between dark matter and standard model particles with spin one mediators in an effective field theory framework. In this paper, we are considering dark part…

hep-ph2020★ 1.2k cited

The anomalous magnetic moment of the muon in the Standard Model

T. Aoyama, N. Asmussen, M. Benayoun +129

We review the present status of the Standard Model calculation of the anomalous magnetic moment of the muon. This is performed in a perturbative expansion in the fine-structure con…

hep-ph2020★ 50 cited

The interplay of transverse degrees of freedom and axial-vector mesons with short-distance constraints in g-2

Pere Masjuan, Pablo Roig, Pablo Sanchez-Puertas

We revisit well-known short-distance constraints relating the hadronic light-by light Green's function to the $⟨ V V A ⟩$ one, that have been a subject of debate over the…

τ data-driven evaluation of Euclidean windows for the hadronic vacuum polarization