Medium Modification Of The Shape Of Small Radius Jets In Central Pb Pb Collisions At Snn

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Medium Modification Of The Shape Of Small Radius Jets In Central Pb Pb Collisions At Snn

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Author : Shreyasi Acharya
language : en
Publisher:
Release Date : 2018

Medium Modification Of The Shape Of Small Radius Jets In Central Pb Pb Collisions At Snn written by Shreyasi Acharya and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018 with categories.

We present the measurement of a new set of jet shape observables for track-based jets in central Pb-Pb collisions at sNN---√=2.76 TeV. The set of jet shapes includes the first radial moment or angularity, g; the momentum dispersion, pTD; and the difference between the leading and sub-leading constituent track transverse momentum, LeSub. These observables provide complementary information on the jet fragmentation and can constrain different aspects of the theoretical description of jet-medium interactions. The jet shapes were measured for a small resolution parameter R = 0.2 and were fully corrected to particle level. The observed jet shape modifications indicate that in-medium fragmentation is harder and more collimated than vacuum fragmentation as obtained by PYTHIA calculations, which were validated with the measurements of the jet shapes in proton-proton collisions at s√=7 TeV. The comparison of the measured distributions to templates for quark and gluon-initiated jets indicates that in-medium fragmentation resembles that of quark jets in vacuum. We further argue that the observed modifications are not consistent with a totally coherent energy loss picture where the jet loses energy as a single colour charge, suggesting that the medium resolves the jet structure at the angular scales probed by our measurements (R = 0.2). Furthermore, we observe that small-R jets can help to isolate purely energy loss effects from other effects that contribute to the modifications of the jet shower in medium such as the correlated background or medium response.

Flying Magazine

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Author :
language : en
Publisher:
Release Date : 2002-08

Flying Magazine written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2002-08 with categories.

Modification Of Jet Shapes In Pbpb Collisions At Sqrt S Nn

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Author :
language : en
Publisher:
Release Date : 2014

Modification Of Jet Shapes In Pbpb Collisions At Sqrt S Nn written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014 with categories.

The first measurement of jet shapes, defined as the fractional transverse momentum radial distribution, for inclusive jets produced in heavy-ion collisions is presented. Data samples of PbPb and pp collisions, corresponding to integrated luminosities of 150 inverse microbarns and 5.3 inverse picobarns respectively, were collected at a nucleon-nucleon centre-of-mass energy of sqrt(s[NN]) = 2.76 TeV with the CMS detector at the LHC. The jets are reconstructed with the anti-kt algorithm with a distance parameter R=0.3, and the jet shapes are measured for charged particles with transverse momentum pt> 1 GeV. The jet shapes measured in PbPb collisions in different collision centralities are compared to reference distributions based on the pp data. A centrality-dependent modification of the jet shapes is observed in the more central PbPb collisions, indicating a redistribution of the energy inside the jet cone. This measurement provides information about the parton shower mechanism in the hot and dense medium produced in heavy-ion collisions.

Observation Of Medium Induced Yield Enhancement And Acoplanarity Broadening Of Low Pt Jets From Measurements In Pp And Central Pb Pb Collisions At Snn

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Author : Shreyasi Acharya
language : en
Publisher:
Release Date : 2023

Observation Of Medium Induced Yield Enhancement And Acoplanarity Broadening Of Low Pt Jets From Measurements In Pp And Central Pb Pb Collisions At Snn written by Shreyasi Acharya and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2023 with categories.

Measurement Of Jet Suppression In Central Pb Pb Collisions At Mml

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Author :
language : en
Publisher:
Release Date : 2015

Measurement Of Jet Suppression In Central Pb Pb Collisions At Mml written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015 with categories.

Here, the transverse momentum (pT) spectrum and nuclear modification factor (RAA) of reconstructed jets in 0-10% and 10-30% central Pb-Pb collisions at √sNN = 2.76 TeV were measured. Jets were reconstructed using the anti-kT jet algorithm with a resolution parameter of R=0.2 from charged and neutral particles, utilizing the ALICE tracking detectors and Electromagnetic Calorimeter (EMCal). The jet pT spectra are reported in the pseudorapidity interval of.

Measurement Of Inclusive Jet Charged Particle Fragmentation Functions In Pb Pb Collisions At Sqrt S Mathrm Nn

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Author :
language : en
Publisher:
Release Date : 2015

Measurement Of Inclusive Jet Charged Particle Fragmentation Functions In Pb Pb Collisions At Sqrt S Mathrm Nn written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015 with categories.

Measurement Of Jet Suppression In Central Pb Pb Collisions At Snn

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Author : Jaroslav Adam
language : en
Publisher:
Release Date : 2015

Measurement Of Jet Suppression In Central Pb Pb Collisions At Snn written by Jaroslav Adam and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015 with categories.

Inclusive Production Of Small Radius Jets In Heavy Ion Collisions

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Author :
language : en
Publisher:
Release Date : 2017

Inclusive Production Of Small Radius Jets In Heavy Ion Collisions written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017 with categories.

Here, we develop a new formalism to describe the inclusive production of small radius jets in heavy-ion collisions, which is consistent with jet calculations in the simpler proton-proton system. Only at next-to-leading order (NLO) and beyond, the jet radius parameter R and the jet algorithm dependence of the jet cross section can be studied and a meaningful comparison to experimental measurements is possible. We are able to consistently achieve NLO accuracy by making use of the recently developed semi-inclusive jet functions within Soft Collinear Effective Theory (SCET). Additionally, single logarithms of the jet size parameter [alpha]$n\atop{s}$lnnR leading logarithmic (NLLR) accuracy in proton-proton collisions. The medium modified semi-inclusive jet functions are obtained within the framework of SCET with Glauber gluons that describe the interaction of jets with the medium. We also present numerical results for the suppression of inclusive jet cross sections in heavy ion collisions at the LHC and the formalism developed here can be extended directly to corresponding jet substructure observables.

Measurement Of The Groomed Jet Radius And Momentum Splitting Fraction In Pp And Pb Pb Collisions At Snn

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Author : Shreyasi Acharya
language : en
Publisher:
Release Date : 2021

Measurement Of The Groomed Jet Radius And Momentum Splitting Fraction In Pp And Pb Pb Collisions At Snn written by Shreyasi Acharya and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021 with categories.

K0s Associated With A Jet In Central Pb Pb Collisions At Snn

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Author : Tuva Richert
language : en
Publisher:
Release Date : 2005

K0s Associated With A Jet In Central Pb Pb Collisions At Snn written by Tuva Richert and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with categories.