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Title: Double parton scattering in $$p\bar p$$ interactions at $$\sqrt{s} = 1.96$$ TeV

We present the observation of doubly produced $$J / \psi$$ mesons as an example of processes containing a substantial fraction of double parton scattering. Measurements of the production cross sections for singly and doubly-produced $$J/\psi$$ mesons were done with the D0 detector at Fermilab in $$p\bar{p}$$ collisions at $$\sqrt{s}$$ = 1.96 TeV with an integrated luminosity of 8.1 fb$$^{-1}$$. For the first time, the double $$J / \psi$$ production cross section is separated into two parts: contributions from both single and double parton scattering. Lastly, this separation allowed us to determine the effective cross section σ eff, a parameter related to the parton spatial density inside the hadron.
Authors:
ORCiD logo [1]
  1. Taras Shevchenko National Univ. of Kyiv, (Ukraine). et al.
Publication Date:
Report Number(s):
FERMILAB-CONF-16-668-PPD
Journal ID: ISSN 2037-4909; 1514400; TRN: US1701078
Grant/Contract Number:
AC02-07CH11359
Type:
Accepted Manuscript
Journal Name:
Il Nuovo Cimento. C
Additional Journal Information:
Journal Volume: C39; Journal Issue: 4; Journal ID: ISSN 2037-4909
Publisher:
Societa italiana di fisica
Research Org:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
Contributing Orgs:
D0 Collaboration
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
OSTI Identifier:
1352036