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Title: Jet energy spectrum and substructure in $e^+e^–$ collisions at 91.2 GeV with ALEPH Archived Data

Journal Article · · Journal of High Energy Physics (Online)
 [1];  [2];  [3];  [4];  [5];  [6];  [7];  [8];  [8];  [9];  [9];  [9];  [9]
  1. Massachusetts Institute of Technology (MIT), Cambridge, MA (United States); Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
  2. Harvard University, Cambridge, MA (United States)
  3. Rice University, Houston, TX (United States)
  4. National Taiwan University, Taipei (Taiwan)
  5. Georgia State University, Atlanta, GA (United States)
  6. European Organization for Nuclear Research (CERN), Geneva (Switzerland)
  7. Istituto Nazionale di Fisica Nucleare (INFN), Bari (Italy)
  8. University of Colorado, Boulder, CO (United States)
  9. Massachusetts Institute of Technology (MIT), Cambridge, MA (United States)
+ Show Author Affiliations

The first measurements of energy spectra and substructure of anti-kT jets in hadronic Z0 decays in e+e– collisions are presented. The archived e+e– annihilation data at a center-of-mass energy of 91.2 GeV were collected with the ALEPH detector at LEP in 1994. In addition to inclusive jet and leading dijet energy spectra, various jet substructure observables are analyzed as a function of jet energy which includes groomed and ungroomed jet mass to jet energy ratios, groomed momentum sharing, and groomed jet radius. The results are compared with perturbative QCD calculations and predictions from the Sherpa, Herwig v7.1.5, Pythia6, Pythia8 and Pyquen event generators. The jet energy spectra agree with perturbative QCD calculations which include the treatment of logarithms of the jet radius and threshold logarithms. None of the event generators give a fully satisfactory description of the data.

Research Organization:
University of Colorado, Boulder, CO (United States); Rice University, Houston, TX (United States); Massachusetts Institute of Technology (MIT), Cambridge, MA (United States)
Sponsoring Organization:
USDOE Office of Science (SC); Research Corporation for Scientific Advancement; Ministry of Science and Technology of Taiwan; Harvard Frederick Sheldon Traveling Fellowship
Grant/Contract Number:
FG02-03ER41244; SC0005131; SC0011088; SC0012567; SC0018117
OSTI ID:
1976483
Journal Information:
Journal of High Energy Physics (Online), Journal Name: Journal of High Energy Physics (Online) Journal Issue: 6 Vol. 2022; ISSN 1029-8479
Publisher:
Springer NatureCopyright Statement
Country of Publication:
United States
Language:
English

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Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
QCD
e+-e− experiments
jet physics
jet substructure
jets