arXiv subjects

Patrick McGaughey

Publications and source records attributed to Patrick McGaughey.

4 recordsLinked to original sources

arXiv2019

Transversly Polarized Proton-Proton Collisions and the Collins Fragmentation Function

The Sivers Function is briefly reviewed and the Collins Fragmentation Function to produce a hadron from a polarized quark is defined. We estimate $π^{+},π^{-}$ +X production, where X represents particles which are not detected, via proton collisions with a polarized proton target using the Collins Fragmentation Function derived using the gluon distribution functions for polarized p-p collisions at E=$\sqrt{s}$=200 GeV.

hep-ph↗

arXiv2019

Sivers Differential Cross Section for $π+X$ Production via $p^{\uparrow}+p$ Collisions, and the Quark Sivers Function

We recently estimated pion+X production via proton collisions with a polarized proton target to enable the Collins fragmentation function to be determined via future experiments. In the present article we first estimate the Silvers differential cross section obtianed from experiments with the target proton having both positive and negative polarizations, and then estimate the Sivers Function using quark distribution functions.

hep-ph↗

arXiv2015

D Production In p-p and d-Au Collisions

This is an extension of our previous work on $J/Ψ$, $Ψ'(2S)$, $Υ(nS)$ production in p-p and A-A collisions to the production of $D^+(c\bar{d}),D^o(c\bar{u})$, with the main new aspect being the fragmentation probability, $D_{c \rightarrow c\bar{q}}$, which has been calculated almost two decades ago. The rapidity cross sections for $D^+(c\bar{d}),D^o(c\bar{u})$ production from both p-p and d-AU collisions is estimated.

hep-ph↗

arXiv2014

Heavy-quark state production in A-A collisions at $\sqrt{s}$=200 GeV

We estimate differential rapidity cross sections for $J/Ψ$ and $Υ(1S)$ production via Cu-Cu and Au-Au collisions at RHIC, and the relative probabilities of $Ψ'(2S)$ to $J/Ψ$ production via p-p collisions using our recent theory of mixed heavy quark hybrids, in which the $Ψ'(2S)$ mesons have approximately equal normal $q\bar{q}$ and hybrid $q\bar{q}g$ components. We also estimate the relative probabilities of $Ψ'(2S)$ to $J/Ψ$ production via Cu-Cu and Au-Au collisions, which will be measured in future RHIC experiments. We also review production ratios of $Υ(2S)$ and $Υ(3S)$ to $Υ(1S)$ in comparison to recent experimental results.This is an extension of our recent work on p-p collisions for possible tests of the production of Quark-Gluon Plasma via A-A collisions at BNL-RHIC.

hep-ph↗