Novel physics opportunities at the HESR-Collider with PANDA at FAIR

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Abstract

Exciting new scientific opportunities are presented for the PANDA detector at the High Energy Storage Ring in the redefined \(\bar{\text{p}} \text{p}(A)\) collider mode, HESR-C, at the Facility for Antiproton and Ion Research (FAIR) in Europe. The high luminosity, \(L \sim 10^{31}\) cm\(^{-2}\) s\(^{-1}\), and a wide range of intermediate and high energies, \(\sqrt{s_{\text{NN}}}\) up to 30 GeV for \(\bar{\text{p}} \text{p}(A)\) collisions will allow to explore a wide range of exciting topics in QCD, including the study of the production of excited open charm and bottom states, nuclear bound states containing heavy (anti)quarks, the interplay of hard and soft physics in the dilepton production, and the exploration of the regime where gluons -- but not quarks -- experience strong interaction.

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Is Open Access

Parton distributions for the LHC

W. Stirling, A Martin, R. S. Thorne … (2009)

We present updated leading-order, next-to-leading order and next-to-next-to-leading order parton distribution functions ("MSTW 2008") determined from global analysis of hard-scattering data within the standard framework of leading-twist fixed-order collinear factorisation in the MSbar scheme. These parton distributions supersede the previously available "MRST" sets and should be used for the first LHC data-taking and for the associated theoretical calculations. New data sets fitted include CCFR/NuTeV dimuon cross sections, which constrain the strange quark and antiquark distributions, and Tevatron Run II data on inclusive jet production, the lepton charge asymmetry from W decays and the Z rapidity distribution. Uncertainties are propagated from the experimental errors on the fitted data points using a new dynamic procedure for each eigenvector of the covariance matrix. We discuss the major changes compared to previous MRST fits, briefly compare to parton distributions obtained by other fitting groups, and give predictions for the W and Z total cross sections at the Tevatron and LHC.