I will present resummed and matched predictions for jet angularities in hadronic $Z+$jet events, where the jet is initiated by a $b$ quark. The analysis is performed both with and without grooming the candidate jets using the Soft drop algorithm. Mass effects are consistently included at both fixed-order and resummed levels and our theoretical predictions also incorporate non-perturbative...
We present a comprehensive study of heavy-hadron production, including $D$ and $B$ mesons, heavy baryons, and the $B_c$ meson. Our calculations are based on the $k_t$-factorization and scale-dependent fragmentation functions, completing the program of implementing this formalism within a variable-flavor-number scheme, as initiated in Phys. Rev.D 104 (2021) 9 094038. Special emphasis is placed...
We present new results for double quarkonium production in (un)polarized hadronic collisions at fixed-target experiments. Our approach combines the transverse momentum dependent (TMD) factorization with the Color-Singlet Model. We present new analytical expressions for the angular structure of the cross section for the $q \bar q$-induced channel, and provide predictions for the unpolarized...
We rivisit Touschek’s resummation procedure for QED and highlight the
possibility of zero momentum modes, insofar neglected in the passage from
the discrete to the continuum, but possible under special boundary conditions.
We shows how to separate and extract the zero momentum mode in soft
photon emission both in the relativistic and non-relativist limit. An ansatz is presented to extend...
Within ultrarelativistic heavy ion collisions the hot and dense medium of a quark gluon plasma (QGP) can be recreated.
While the QGP medium cannot be directly measured, jets, i.e. highly energetic,
collimated, sprays of strongly interacting particles provide a suitable indirect means to access the QGP.
In the medium jets can evolve by the jet-medium interactions of scattering off medium...
In this talk, I will talk about our recent studies of the Koba–Nielsen–Olesen (KNO) scaling within QCD jets. Specificially, We evaluate the KNO scaling functions for quark- and gluon-initiated jets by incorporating energy conservation into the Double Logarithmic Approximation (DLA). The resulting modified DLA (MDLA) expressions differ substantially from the DLA predictions and qualitatively...
In this talk, I present a new approach to studying next-to-leading power (NLP) contributions in inelastic processes, based on the background field method with the explicit inclusion of soft modes. I first detail the different structures contributing to the effective current operator at NLP in this framework and discuss how they differ from previous results. The method is then applied to...
We investigate the core dynamics behind exotic matter formation via the TQ4Q1.1 set of collinear, variable-flavor-number-scheme fragmentation functions for fully charmed or bottomed tetraquarks in three quantum configurations: scalar ($0^{++}$), axial vector ($1^{+-}$), and tensor ($2^{++}$). We adopt single-parton fragmentation at leading power and implement a nonrelativistic QCD...
Energy-Energy Correlation (EEC) in electron-positron
annihilation into hadrons at high energy, gives the distribution
of the angular distance between hadronic jets in the final state.
The measure is usually inclusive over quark flavors,
implying that also beauty (charm) quark Correlations
are included. Given the great accuracy reached in both
experimental and present theoretical...
