Observation and studies of double $J/$$ production at the Tevatron

D0 Collaboration (2014) Observation and studies of double $J/$$ production at the Tevatron. Physical Review D, 90 (1). ISSN 1550-7998

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We present the observation of doubly produced J/ψ mesons with the D0 detector at Fermilab in pp¯ collisions at s√=1.96  TeV. The production cross section for both singly and doubly produced J/ψ mesons is measured using a sample with an integrated luminosity of 8.1  fb−1. For the first time, the double J/ψ production cross section is separated into contributions due to single and double parton scatterings. Using these measurements, we determine the effective cross section σeff, a parameter characterizing an effective spatial area of the parton-parton interactions and related to the parton spatial density inside the nucleon.

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Journal Article
Journal or Publication Title:
Physical Review D
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© 2014 American Physical Society
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Deposited On:
15 Dec 2014 09:04
Last Modified:
17 Sep 2023 01:35