Measurement of the Splitting Function in pp and Pb-Pb Collisions at ?sNN=5.02??TeV

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Tarih

2018

Dergi Başlığı

Dergi ISSN

Cilt Başlığı

Yayıncı

American Physical Society

Erişim Hakkı

Özet

Data from heavy ion collisions suggest that the evolution of a parton shower is modified by interactions with the color charges in the dense partonic medium created in these collisions, but it is not known where in the shower evolution the modifications occur. The momentum ratio of the two leading partons, resolved as subjets, provides information about the parton shower evolution. This substructure observable, known as the splitting function, reflects the process of a parton splitting into two other partons and has been measured for jets with transverse momentum between 140 and 500 GeV, in ppand PbPb collisions at a center-of-mass energy of 5.02 TeV per nucleon pair. In central PbPb collisions, the splitting function indicates a more unbalanced momentum ratio, compared to peripheral PbPb and pp collisions.. The measurements are compared to various predictions from event generators and analytical calculations

Açıklama

Anahtar Kelimeler

Quark-gluon plasma, Relativistic heavy-ion collisions

Kaynak

WoS Q Değeri

Q1

Scopus Q Değeri

Q1

Cilt

Sayı

Künye

PHYSICAL REVIEW LETTERS 120, 142302 (2018)