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VERSION:2.0
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SUMMARY:Jetography in Heavy Ion Collisions
DTSTART:20250117T090000Z
DTEND:20250117T110000Z
DTSTAMP:20260706T060504Z
UID:33448873-03a1-42d4-828a-e66f496cc004
SEQUENCE:5
CREATED:20241219T092921Z
DESCRIPTION:In the last two decades\, ultra-relativistic heavy ion collide
 rs have unlocked the study of the Quark Gluon Plasma (QGP) - a hot\, dense
 \, and rapidly expanding state of matter exhibiting both deconfinement of 
 its partonic degrees of freedom and signatures of collective behaviour (e.
 g. nearly zero viscosity). Due to its extremely short lifetime (10^-24 s) 
 the QGP is mainly studied through probes such as jets\, clusterings of fin
 al state hadrons with a common partonic origin. Since jet development cove
 rs a wide range of energies\, the modifications of these observables due t
 o the QGP\, known as jet quenching\, provide valuable insight into QGP dev
 elopment.Theoretical descriptions of jet quenching still lack a unified fr
 amework for both vacuum-like and medium-induced radiation\, a task complic
 ated by the former being formulated in momentum space while the latter req
 uires some interface with the coordinate space development of the medium. 
 Since most state-of-the-art models postulate some space-time picture of je
 t development based on the splitting kinematics\, we set out to explore di
 fferent but equivalent formulations of vacuum-like emissions by building M
 onte-Carlo Parton Showers ordered in formation time\, invariant mass\, and
  opening angle\, and considering the impact of these choices on a simplifi
 ed jet quenching model. We find significant variation between orderings\, 
 particularly for thin media.Another shortcoming lies in the breakdown of c
 olour coherence\, which guarantees angular ordering of vacuum-like emissio
 ns. While medium-induced emissions are known to violate this condition\, c
 urrent results are limited by reliance on simplified scattering rates\, va
 lid only in restricted phase-space regions. Inspired by a previously intro
 duced formalism based on Dyson-Schwinger equations\, we compute the decohe
 rence parameter of a quark-antiquark antenna in the QGP for two realistic 
 scattering rates.
LAST-MODIFIED:20250106T114132Z
LOCATION:Online
URL:http://df.vps.tecnico.ulisboa.pt/pt/eventos/etography-in-heavy-ion-col
 lisions/
X-ALT-DESC;FMTTYPE=text/html:<p data-block-key="fc17x"></p><p data-block-k
 ey="1ptvb">In the last two decades\, ultra-relativistic heavy ion collider
 s have unlocked the study of the Quark Gluon Plasma (QGP) - a hot\, dense\
 , and rapidly expanding state of matter exhibiting both deconfinement of i
 ts partonic degrees of freedom and signatures of collective behaviour (e.g
 . nearly zero viscosity).<br/><br/> Due to its extremely short lifetime (1
 0^-24 s) the QGP is mainly studied through probes such as jets\, clusterin
 gs of final state hadrons with a common partonic origin. Since jet develop
 ment covers a wide range of energies\, the modifications of these observab
 les due to the QGP\, known as jet quenching\, provide valuable insight int
 o QGP development.<br/><br/></p><p data-block-key="56l22">Theoretical desc
 riptions of jet quenching still lack a unified framework for both vacuum-l
 ike and medium-induced radiation\, a task complicated by the former being 
 formulated in momentum space while the latter requires some interface with
  the coordinate space development of the medium.<br/><br/> Since most stat
 e-of-the-art models postulate some space-time picture of jet development b
 ased on the splitting kinematics\, we set out to explore different but equ
 ivalent formulations of vacuum-like emissions by building Monte-Carlo Part
 on Showers ordered in formation time\, invariant mass\, and opening angle\
 , and considering the impact of these choices on a simplified jet quenchin
 g model. We find significant variation between orderings\, particularly fo
 r thin media.<br/><br/></p><p data-block-key="7d3hc">Another shortcoming l
 ies in the breakdown of colour coherence\, which guarantees angular orderi
 ng of vacuum-like emissions. While medium-induced emissions are known to v
 iolate this condition\, current results are limited by reliance on simplif
 ied scattering rates\, valid only in restricted phase-space regions. Inspi
 red by a previously introduced formalism based on Dyson-Schwinger equation
 s\, we compute the decoherence parameter of a quark-antiquark antenna in t
 he QGP for two realistic scattering rates.</p><p data-block-key="8fjq0"></
 p>
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