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

Journal Article · Wed Dec 28 00:00:00 EST 2016 · Il Nuovo Cimento. C

DOI:https://doi.org/10.1393/ncc/i2016-16333-7· OSTI ID:1352036

Gogota, O.  ^[1]

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1. Taras Shevchenko National Univ. of Kyiv, (Ukraine). et al.

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.

• Research Organization: Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
• Sponsoring Organization: USDOE Office of Science (SC), High Energy Physics (HEP)
• Contributing Organization: D0 Collaboration
• Grant/Contract Number: AC02-07CH11359
• OSTI ID: 1352036
• Report Number(s): FERMILAB-CONF-16-668-PPD; 1514400; TRN: US1701078
• Journal Information: Il Nuovo Cimento. C, Vol. C39, Issue 4; ISSN 2037-4909
• Publisher: Societa italiana di fisica
• Country of Publication: United States
• Language: English

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