Leandro Cieri
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View article: Gauge theory approach to describe ice crystals habit evolution in ice clouds
Gauge theory approach to describe ice crystals habit evolution in ice clouds Open
Ice clouds, particularly cirrus clouds, significantly influence Earth's radiative balance but remain poorly characterized in current climate models. A major uncertainty arises from the variability of their microphysical properties, especia…
View article: Vacuum amplitudes and time-like causal unitary in the loop-tree duality
Vacuum amplitudes and time-like causal unitary in the loop-tree duality Open
A bstract We present the first proof-of-concept application to decay processes at higher perturbative orders of loop-tree duality (LTD) causal unitary, a novel methodology that exploits the causal properties of vacuum amplitudes in the LTD…
View article: Triple (and Quadruple) Soft-parton Radiation in QCD Hard Scattering
Triple (and Quadruple) Soft-parton Radiation in QCD Hard Scattering Open
We compute the tree-level current for triple soft-gluon emission from both massless and massive hard partons. The three-gluon current is expressed in terms of the maximally non-Abelian irreducible correlations. We compute the soft behaviou…
View article: Loop Feynman integration on a quantum computer
Loop Feynman integration on a quantum computer Open
This work investigates in detail the performance and advantages of a new quantum Monte Carlo integrator, dubbed quantum Fourier iterative amplitude estimation (QFIAE), to numerically evaluate for the first time loop Feynman integrals in a …
View article: Vacuum amplitudes and time-like causal unitary in the loop-tree duality
Vacuum amplitudes and time-like causal unitary in the loop-tree duality Open
We present the first proof-of-concept application to decay processes at higher perturbative orders of LTD causal unitary, a novel methodology that exploits the causal properties of vacuum amplitudes in the loop-tree duality (LTD) and is di…
View article: Catani's generalization of collinear factorization breaking
Catani's generalization of collinear factorization breaking Open
We consider the most general form of soft and collinear factorization for hard-scattering amplitudes to all orders in perturbative Quantum Chromodynamics. Specifically, we present the generalization of collinear factorization to configurat…
View article: Loop Feynman integration on a quantum computer
Loop Feynman integration on a quantum computer Open
This work investigates in detail the performance and advantages of a new quantum Monte Carlo integrator, dubbed Quantum Fourier Iterative Amplitude Estimation (QFIAE), to numerically evaluate for the first time loop Feynman integrals in a …
View article: Quantum Fourier Iterative Amplitude Estimation
Quantum Fourier Iterative Amplitude Estimation Open
Monte Carlo integration is a widely used numerical method for approximating integrals, which is often computationally expensive. In recent years, quantum computing has shown promise for speeding up Monte Carlo integration, and several quan…
View article: Two-loop form factors for diphoton production in quark annihilation channel with heavy quark mass dependence
Two-loop form factors for diphoton production in quark annihilation channel with heavy quark mass dependence Open
We present the computation of the two-loop form factors for diphoton production in the quark annihilation channel. These quantities are relevant for the NNLO QCD corrections to diphoton production at LHC recently presented in arXiv:2308.10…
View article: Full top-quark mass dependence in diphoton production at NNLO in QCD
Full top-quark mass dependence in diphoton production at NNLO in QCD Open
In this paper we consider the diphoton production in hadronic collisions at the next-to-next-to-leading order (NNLO) in perturbative QCD, taking into account for the first time the full top quark mass dependence up to two loops (full NNLO)…
View article: Quantum Fourier Iterative Amplitude Estimation
Quantum Fourier Iterative Amplitude Estimation Open
Monte Carlo integration is a widely used numerical method for approximating integrals, which is often computationally expensive. In recent years, quantum computing has shown promise for speeding up Monte Carlo integration, and several quan…
View article: Drell-Yan lepton-pair production: $q_T$ resummation at approximate N$^4$LL+N$^4$LO accuracy
Drell-Yan lepton-pair production: $q_T$ resummation at approximate N$^4$LL+N$^4$LO accuracy Open
We consider Drell-Yan lepton pairs produced in hadronic collisions. We present high-accuracy QCD predictions for the transverse-momentum ($q_T$) distribution and fiducial cross sections in the small $q_T$ region. We resum to all perturbati…
View article: Combining QED and QCD transverse-momentum resummation for W and Z boson production at hadron colliders
Combining QED and QCD transverse-momentum resummation for W and Z boson production at hadron colliders Open
In this article, we consider the transverse momentum ($q_T$) distribution of $W$ and $Z$ bosons produced in hadronic collisions. We combine the $q_T$ resummation for QED and QCD radiation including the QED soft emissions from the $W$ boson…
View article: Quantum clustering and jet reconstruction at the LHC
Quantum clustering and jet reconstruction at the LHC Open
Clustering is one of the most frequent problems in many domains, in particular, in particle physics where jet reconstruction is central in experimental analyses. Jet clustering at the CERN's Large Hadron Collider (LHC) is computationally e…
View article: Soft gluon-quark-antiquark emission in QCD hard scattering
Soft gluon-quark-antiquark emission in QCD hard scattering Open
We consider the radiation of a soft gluon ($g$) and a soft quark-antiquark ($q{\bar q}$) pair in QCD hard scattering. In the soft limit the scattering amplitude has a singular behaviour that is factorized and controlled by a soft current, …
View article: Quantum jet clustering with LHC simulated data
Quantum jet clustering with LHC simulated data Open
We study the case where quantum computing could improve jet clustering by considering two new quantum algorithms that might speed up classical jet clustering algorithms. The first one is a quantum subroutine to compute a Minkowski-based di…
View article: Quantum jet clustering with LHC simulated data
Quantum jet clustering with LHC simulated data Open
We study the case where quantum computing could improve jet clustering by considering two new quantum algorithms that might speed up classical jet clustering algorithms. The first one is a quantum subroutine to compute a Minkowski-based di…
View article: Quantum clustering and jet reconstruction at the LHC
Quantum clustering and jet reconstruction at the LHC Open
Clustering is one of the most frequent problems in many domains, in particular, in particle physics where jet reconstruction is central in experimental analyses. Jet clustering at the CERN's Large Hadron Collider (LHC) is computationally e…
View article: Higgs boson production at the LHC: fast and precise predictions in QCD\n at higher orders
Higgs boson production at the LHC: fast and precise predictions in QCD\n at higher orders Open
We present a new numerical program, HTurbo, which provides fast and\nnumerically precise predictions for Higgs boson production cross sections. The\npresent version of the code implements the perturbative QCD expansion up to the\nnext-to-n…
View article: Fiducial perturbative power corrections within the q$_{\bf T}$ subtraction formalism
Fiducial perturbative power corrections within the q$_{\bf T}$ subtraction formalism Open
We consider higher-order QCD corrections to the production of high-mass systems in hadron collisions within the transverse-momentum (q$_{\rm T}$) subtraction formalism. We present a method to consistently remove the linear power correction…
View article: Exploring QED Effects to Diphoton Production at Hadron Colliders
Exploring QED Effects to Diphoton Production at Hadron Colliders Open
In this article, we report phenomenological studies about the impact of O(α) corrections to diphoton production at hadron colliders. We explore the application of the Abelianized version of the qT-subtraction method to efficiently compute …