Measurements of jet quenching using semi-inclusive hadron+jet distributions in <math><mrow><mi>p</mi><mi>p</mi></mrow></math> and central Pb-Pb collisions at <math><mrow><msqrt><msub><mi>s</mi><mrow><mi>N</mi><mi>N</mi></mrow></msub></msqrt><mo>=</mo><mn>5.02</mn></mrow></math> TeV - INSPIRE

DataBETA

Measurements of jet quenching using semi-inclusive hadron+jet distributions in $p p$ and central Pb-Pb collisions at $\sqrt{s_{N N}} = 5.02$ TeV

ALICE

Collaboration

Aug 30, 2023

36 pages

Published in:

Phys.Rev.C 110 (2024) 1, 014906

Published: Jul 9, 2024

e-Print:

2308.16128 [nucl-ex]

DOI:

10.1103/PhysRevC.110.014906 (publication)

Report number:

CERN-EP-2023-188

Experiments:

CERN-LHC-ALICE

View in:

reference search15 citations

Citations per year

Abstract: (APS)

The ALICE Collaboration reports measurements of the semi-inclusive distribution of charged-particle jets recoiling from a high transverse momentum (high

p_{T}

) charged hadron, in

p p

and central Pb-Pb collisions at center-of-mass energy per nucleon–nucleon collision

\sqrt{s_{NN}} = 5.02

TeV. The large uncorrelated background in central Pb-Pb collisions is corrected using a data-driven statistical approach which enables precise measurement of recoil jet distributions over a broad range in

p_{T, ch jet}

and jet resolution parameter

R

. Recoil jet yields are reported for

R = 0.2

, 0.4, and 0.5 in the range

7 < p_{T, ch jet} < 140 GeV / c

and

π / 2 < Δ φ < π

, where

Δ φ

is the azimuthal angular separation between hadron trigger and recoil jet. The low-

p_{T, ch jet}

reach of the measurement explores unique phase space for studying jet quenching, the interaction of jets with the quark–gluon plasma generated in high-energy nuclear collisions. Comparison of

p_{T, ch jet}

distributions from

p p

and central Pb-Pb collisions probes medium-induced jet energy loss and intra-jet broadening, while comparison of their acoplanarity distributions explores in-medium jet scattering and medium response. The measurements are compared to theoretical calculations incorporating jet quenching.

Note:

56 pages, 22 captioned figures, 4 tables, authors from page 50, published version, figures at http://alice-publications.web.cern.ch/node/9599

jet: quenching
jet: recoil
charged particle: jet
jet: interaction
hadron: jet
jet: energy loss
jet: yield
jet: resolution
hadron: trigger
transverse momentum: high

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