Abstract:We summarize the theoretical description of charmonium and bottonium production in hadronic collisions and compare it to the available data from hadron-nucleon interactions. With the parameters of the theory established by these data, we obtain predictions for quarkonium production at RHIC and LHC energies.

We consider one-loop corrections to partial widths of the Z induced by supersymmetric Yukawa interactions that violate R-parity. The precise experimental values of the leptonic Z partial widths bound these Yukawa couplings, with the most interesting constraints being those on couplings involving the τ , since previous constraints on them were very mild.

The first results on next-to-leading order QCD corrections to graviton-induced processes in hadron collisions in models of TeV-scale gravity are presented focusing on the case of dilepton pair production inpp and pp collisions. Distributions in the invariant mass Q, the longitudinal fraction x F , the rapidity Y and the forward-backward asymmetry of the lepton pair are studied. The quantitative impact of the QCD corrections for searches of extra dimensions at hadron colliders is investigated. It turns out that at the LHC ( √ S = 14 TeV) the K-factor is rather large (K = 1.6) for large invariant mass Q of the lepton pair, indicating the importance of accounting for these QCD corrections in the experimental search for TeV-scale gravity. At the Tevatron, the K-factor does not substantially deviate from the Standard Model value. However, its inclusion is necessitated to make the cross-section stable with respect to scale variations.PACS numbers: 11.10. Kk, 13.60.Hb. contributions to SM processes strongly suggests that the LO corrections at hadronic colliders are quiet unreliable [6,7]. The standard Drell-Yan (DY) processes and Higgs production at hadron colliders, for example, not only get large corrections but the theoretical uncertainties get reduced significantly from NLO corrections.It is with this motivation that the present paper presents the results of the computation of NLO-QCD corrections to the DY process, P 1 + P 2 → µ + µ − + X, where P 1 , P 2 are initial hadrons and X is an arbitrary hadronic final state. This process takes place via the exchange of γ, Z and graviton. These NLO results are used to study the impact of the QCD correction for this process at the present Tevatron collider and the future LHC which is planned to operate at centre-of-mass energies around 14 TeV. This process had been considered earlier to LO [8,9] in the ADD model.The results we present here are for the ADD model, but since the QCD corrections, presented here, are model-independent they may equally be used for studying the Randall-Sundrum model of warped compactification [10].This paper is organised as follows. In Sec. 2 we describe additional graviton vertices needed to perform the NLO QCD corrections. We study the distributions in the invariant mass Q (Sec. 3), the longitudinal fraction x F (Sec. 4), the rapidity Y (Sec. 5) and the forward-backward asymmetry (Sec. 6) of lepton pair. Finally in Sec. 7 we present the discussion and summarise the results. In Appendix A and B we present the detailed expressions needed for x F and Y distributions in Sec. 4 and Sec. 5 respectively.

We study the effects of intrinsic transverse momentum smearing on J/ψ production both at the Tevatron and at HERA. For the case of large-p T J/ψ production at the Tevatron, the effects due to k T smearing are mild. On the other hand, inelastic J/ψ photoproduction at HERA is very sensitive to the k T smearing and, in fact, with a reasonable value of k T it is possible to resolve the large-z discrepancy seen by comparing non-relativistic QCD (NRQCD) predictions with the HERA data. We conclude that, with the present kinematic cuts, photoproduction at HERA is not a good test of NRQCD. * sridhar@theory.tifr.res.in † A.D.Martin@durham.ac.uk ‡ W.J.Stirling@durham.ac.uk

The work contained herein constitutes a report of the "Beyond the Standard Model" working group for the Workshop "Physics at TeV Colliders", Les Houches, France, 26 May-6 June, 2003. The research presented is original, and was performed specifically for the workshop. Tools for calculations in the minimal supersymmetric standard model are presented, including a comparison of the dark matter relic density predicted by public codes. Reconstruction of supersymmetric particle masses at the LHC and a future linear collider facility is examined. Less orthodox supersymmetric signals such as non-pointing photons and Rparity violating signals are studied. Features of extra dimensional models are examined next, including measurement strategies for radions and Higgs', as well as the virtual effects of Kaluza Klein modes of gluons. An LHC search strategy for a heavy top found in many little Higgs model is presented and finally, there is an update on LHC Z ′ studies. XIV Radion Mixing Effects In The Two-Higgs-DoubletModel 74 XV Search For The Radion Decay φ → hh With γγ+bb, τ τ +bb And bb+bb Final States In CMS 80 XVI The Invisible Higgs Decay Width In The ADD Model At The LHC 86 XVII Determining the extra-dimensional location of the Higgs boson 92 XVIII The sensitivity of the LHC for TeV scale dimensions in dijet production 95 XIX Little Higgs Model: LHC Potential 99 XX Z ′ studies at the LHC: an update 104 5 Part I Abstract An accord specifying a unique set of conventions for supersymmetric extensions of the Standard Model together with generic file structures for (1) supersymmetric model specifications and input parameters, (2) electroweak scale supersymmetric mass and coupling spectra, and (3) decay tables is defined, to provide a universal interface between spectrum calculation programs, decay packages, and high energy physics event generators. AbstractWe present and describe an internet resource which allows the user to compare different calculations of MSSM spectra. After providing (currently mSUGRA) SUSY breaking input parameters, the spectra predicted by the publicly available programs ISASUGRA, SOFTSUSY, SPHENO and SUSPECT are output by the resource. The variance and range of results is also produced. AbstractWe compare the relic density of neutralino dark matter within the minimal supergravity model (mSUGRA) using four different public codes for supersymetric spectra evaluation.Abstract SFITTER is a new tool to determine supersymmetric model parameters from collider measurements. It allows to perform a grid search for the minimal χ 2 and/or a fit of a given model. Currently, the model parameters in the general MSSM or in a gravity mediated SUSY breaking model can be tested using a given set of mass, branching ratio and cross section measurements. AbstractWe present the Fortran code SDECAY, a program which calculates the decay widths and branching ratios of all supersymmetric particles in the Minimal Supersymmetric Standard Model, including higher order effects. The usual two-body decays of sfermions and gauginos as ...