3,415 research outputs found

    Unparticle physics in diphoton production at the CERN LHC

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    We have considered the di-photon production with unparticle at LHC. The contributions of spin-0 and spin-2 unparticle to the di-photon production are studied in the invariant mass and other kinematical distributions, along with their dependencies on the model dependent parameters. The signal corresponding to the unparticle is significant for moderate coupling constant values.Comment: 17 pages, 15 eps figure

    Pseudo-scalar Higgs Boson Production at Threshold N3^3LO and N3^3LL QCD

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    We present the first results on the production of pseudo-scalar through gluon fusion at the LHC to N3^3LO in QCD taking into account only soft gluon effects. We have used the effective Lagrangian that describes the coupling of pseudo-scalar with the gluons in the large top quark mass limit. We have used recently available quantities namely the three loop pseudo-scalar form factor and the third order universal soft function in QCD to achieve this. Along with the fixed order results, we also present the process dependent resummation coefficient for threshold resummation to N3^3LL in QCD. Phenomenological impact of these threshold N3^3LO corrections to pseudo-scalar production at the LHC is presented and their role to reduce the renormalisation scale dependence is demonstrated.Comment: 34 pages, 17 figure

    Influence of moisture management finish on comfort characteristics of knitted fabrics made from different yarns

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    102-108The influence of moisture management finish on comfort characteristics of knitted fabrics made from five different yarns has been studied in order to find out their level of performance. In order to study this effect, five types of yarns, namely microdenier polyester, spun polyester, polyester / cotton, filament polyester and 100% cotton, have been converted to knitted fabrics. It is observed that microdenier polyester fabrics having high wicking action and quicker moisture evaporation show superior performance with respect to comfort characteristics

    Influence of moisture management finish on comfort characteristics of knitted fabrics made from different yarns

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    The influence of moisture management finish on comfort characteristics of knitted fabrics made from five different yarns has been studied in order to find out their level of performance. In order to study this effect, five types of yarns, namely microdenier polyester, spun polyester, polyester / cotton, filament polyester and 100% cotton, have been converted to knitted fabrics. It is observed that microdenier polyester fabrics having high wicking action and quicker moisture evaporation show superior performance with respect to comfort characteristic

    Pseudo-scalar Higgs boson production at N3^3LOA_{\text{A}}+N3^3LL′^\prime

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    We consider the production of a pseudo-scalar particle AA at the LHC, and present accurate theoretical predictions for its inclusive cross section in gluon fusion. The prediction is based on combining fixed-order perturbation theory and all-order threshold resummation. At fixed order we include the exact next-to-next-to-leading order (NNLO) plus an approximate next-to-next-to-next-to-leading order (N3^3LOA_{\rm A}) which is based on the recent computation at this order for the scalar case. We then add threshold resummation at next-to-next-to-next-to leading logarithmic accuracy (N3^3LL′^\prime). Various forms of threshold resummation are considered, differing by the treatment of subleading terms, allowing a robust estimate of the theoretical uncertainties due to missing higher orders. With particular attention to pseudo-scalar masses of 200200 GeV and 750750 GeV, we also observe that perturbative convergence is much improved when resummation is included. Additionally, results obtained with threshold resummation in direct QCD are compared with analogous results as computed in soft-collinear effective theory, which turn out to be in good agreement. We provide precise predictions for pseudo-scalar inclusive cross section at 1313 TeV LHC for a wide range of masses. The results are available through updated versions of the public codes ggHiggs and TROLL.Comment: 14 pages, 7 figures, 1 table. Now includes a more precise assessment of the uncertainty on the approximate N3LO. Final version accepted by EPJ

    Extra dimension searches at hadron colliders to next-to-leading order-QCD

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    The quantitative impact of NLO-QCD corrections for searches of large and warped extra dimensions at hadron colliders are investigated for the Drell-Yan process. The K-factor for various observables at hadron colliders are presented. Factorisation, renormalisation scale dependence and uncertainties due to various parton distribution functions are studied. Uncertainties arising from the error on experimental data are estimated using the MRST parton distribution functions
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