A5059514278- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- High-Energy Particle Collisions Research
- Black Holes and Theoretical Physics
- Nuclear physics research studies
- Cosmology and Gravitation Theories
- Particle Accelerators and Free-Electron Lasers
- Neutrino Physics Research
- History and advancements in chemistry
- Computational Physics and Python Applications
- Particle Detector Development and Performance
- Distributed and Parallel Computing Systems
Istituto Nazionale di Fisica Nucleare, Sezione di Milano
2018-2022
University of Milan
2022
Istituto Nazionale di Fisica Nucleare
2019
Max Planck Institute for Physics
2014-2016
Università degli Studi del Piemonte Orientale “Amedeo Avogadro”
2014
Istituto Nazionale di Fisica Nucleare, Sezione di Padova
2014
University of Padua
2014
University of Zurich
2014
Max Planck Society
2014
Roma Tre University
2011-2012
A bstract We present the first complete next-to-next-to-leading order analysis of Standard Model Higgs potential. computed two-loop QCD and Yukawa corrections to relation between quartic coupling ( λ ) mass M h ), reducing theoretical uncertainty in determination critical value for vacuum stability 1 GeV. While at Planck scale is remarkably close zero, absolute potential excluded 98 % C.L. < 126 Possible consequences near vanishing scale, including speculations about role field during...
We elaborate on the method of differential equations for evaluating Feynman integrals. focus systems master integrals having a linear dependence dimensional parameter. For these we identify criteria to bring them in canonical form, recently identified by Henn, where parameter is disentangled from kinematics. The determination transformation and computation solution are obtained using Magnus Dyson series expansion. apply planar non-planar two-loop QED vertex diagrams massive fermions,...
The Higgs self-coupling is notoriously intangible at the LHC. It was recently proposed to probe trilinear interaction through its radiative corrections single-Higgs processes. This approach however requires disentangle these effects from those associated deviations of other Higgs-couplings fermions and gauge bosons. We show that a global fit exploiting only inclusive data suffers degeneracies prevent one extracting robust bounds on each individual coupling. how inclusion double-Higgs...
We evaluate the master integrals for two-loop non-planar box-diagrams contributing to elastic scattering of muons and electrons at next-to-next-to-leading order in QED. adopt method differential equations Magnus exponential determine a canonical set integrals, finally expressed as Taylor series around four space-time dimensions, with coefficients written combination generalised polylogarithms. The electron is treated massless, while we retain full dependence on muon mass. considered are also...
The three-loop master integrals for ladder-box diagrams with one massive leg are computed from an eighty-five by system of differential equations, solved means Magnus exponential. results the considered box-type integrals, as well tower vertex- and bubble-type associated to subtopologies, given a Taylor series expansion in dimensional regulator parameter epsilon = (4-d)/2. coefficients expressed terms uniform weight combinations multiple polylogarithms transcendental constants up six. enter...
We perform a global effective-field-theory analysis to assess the precision on determination of Higgs trilinear self-coupling at future lepton colliders. Two main scenarios are considered, depending whether center-of-mass energy colliders is sufficient or not access pair production processes. Low-energy machines allow for ∼ 40% extraction coupling through exploitation next-to-leading-order effects in single measurements, provided that runs both 240/250 GeV and 350 available with luminosities...
We compute the two-loop QCD corrections to neutral Higgs-boson masses in MSSM, including effect of non-vanishing external momenta self-energies. obtain O(alpha_t*alpha_s) and O(alpha*alpha_s), i.e., all that involve strong gauge coupling when only Yukawa is top one. adopt either DRbar renormalization scheme or a mixed OS-DRbar where top/stop parameters are renormalized on-shell. compare our results with those earlier calculations, pointing out an inconsistency recent result obtained scheme....
We present the first fully analytic evaluation of transition amplitude for scattering a massless into massive pair fermions at two-loop level in quantum electrodynamics. Our result is an essential ingredient determination electromagnetic coupling within reactions, beyond currently known accuracy, which has crucial impact on anomalous magnetic moment muon. It will allow, particular, precise leading hadronic contribution to (g-2)_{μ} MUonE experiment CERN, and therefore can be used shed light...
We present a calculation of the two-loop quark-squark-gluino contributions to pseudoscalar Higgs boson production via gluon fusion in MSSM. regularize loop integrals using Pauli-Villars method, and obtain explicit compact analytic results based on an expansion heavy particle masses. Our - valid when is lighter than squarks gluinos can be easily implemented computer codes for efficient accurate determination cross section.
We present the calculation of master integrals needed for two-loop QCD × EW corrections to $$ q+\overline{q}\to {l}^{-}+{l}^{+} and q+\overline{q}^{\prime}\to {l}^{-}+\overline{\nu} , massless external particles. treat W Z bosons as degenerate in mass. identify three types diagrams, according presence massive internal lines: no-mass type, one-mass two-mass where all propagators, when occurring, contain same mass value. find a basis 49 evaluate them with method differential equations. The...
We review the current status of theory predictions for elastic $\mu$-$e$ scattering, describing recent activities and future plans initiative related to proposed MUonE experiment.
The Magnus Exponential can be employed to solve the system of differential equations obeyed by Feynman integrals in dimensional regularization.We discuss basic ideas behind use series expansion, and how solution naturally arises terms repeated that are equivalent coefficients a Dyson series.Finally, we show its application evaluation planar non-planar two-loop QED vertex diagrams for massive fermions, contributing 2 → scattering massless particles.
We compute the two-loop master integrals required for leading QCD corrections to interaction vertex of a massive neutral boson X 0, e.g. H, Z or γ∗, with pair W bosons, mediated by SU(2) L quark doublet composed one and massless flavor. All external legs are allowed have arbitrary invariant masses. The Magnus exponential is employed identify set that, around d = 4 space-time dimensions, obey canonical system differential equations. given as Taylor series in ϵ (4 − d)/2, up order four,...
We show that the Standard Model vacuum can be stabilized if all particle propagators are non-minimally coupled to gravity. This is due a Higgs-background dependent redefinition of fields: in terms canonical variables and large Higgs field limit, quantum fluctuations redefined fields suppressed by background. Thus, this regime, corrections tree-level electroweak potential negligible. Finally, we framework boson responsible for inflation. Due numerical coincidence originates from CMB data,...
A bstract We complete the analytic evaluation of master integrals for two-loop non-planar box diagrams contributing to top-pair production in quark-initiated channel, at next-to-next-to-leading order QCD. The are determined from their differential equations, which cast into a canonical form using Magnus exponential. expressions Laurent series coefficients expressed as combinations generalized polylogarithms, we validate with several numerical checks. discuss continuation planar and...
We present lattice results for the vector and scalar form factors of semileptonic decays D → π ν K in physical range values squared four momentum transfer q 2 , obtained with N f = maximally twisted Wilson fermions simulated at three different spacings (a 0.102 fm 0.086 0.068 ) pion masses as light 270 MeV m L 4. The are extracted using a double ratios strategy, which allows good statistical accuracy is independent current renormalization constant.The chiral/continuum extrapolation performed...
We present lattice results for the vector and scalar form factors of semileptonic decays D -> \pi \ell \nu_ell K \nu_\ell in physical range values squared four momentum transfer q^2, obtained with N_f=2 maximally twisted Wilson fermions simulated at three different spacings (a ~ 0.102 fm, 0.086 0.068 fm) pion masses as light 270 MeV m_\pi L \gtrsim 4. The are extracted using a double ratios strategy, which allows good statistical accuracy is independent current renormalization constant....