“…Fixed-target collisions offer many physics opportunities related to hadronic matter and the quark-gluon plasma to extend the research potential of the CERN accelerator complex. …”
Enlace del recurso

“…Measurements of bottomonium states in heavy-ion collisions provide a powerful tool to study both initial-state effects on heavy-quark production and final-state interactions between heavy quarks and the quark-gluon plasma (QGP). The ATLAS experiment at LHC has measured the production of bottomonium states $\Upsilon$(1S), $\Upsilon$(2S), and $\Upsilon$(3S), in Pb+Pb and $pp$ collisions at a center-of-mass energy per nucleon pair of 5.02 TeV. …”
Enlace del recurso

“…We review recent results for quark jets and compute the Sudakov form factor for the collinear fragmentation of gluon jets at NNLL. The NNLL corrections are encoded in a $z$ dependent two-loop anomalous dimension $B_2(z)$, with $z$ being a suitably defined longitudinal momentum fraction. …”
Enlace del recurso

“…At low invariant mass (mee), thermal radiation from the hot hadron gas (HG) contributes to the spectrum while at larger mee, thermal radiation from the quark–gluon plasma (QGP) carries information about the early temperature of the medium. …”
Enlace del recurso
Enlace del recurso

“…The production of a top quark-antiquark pair in association with a Higgs pair (ttHH) plays a special role in this context because, even if much rarer than the gluon fusion or Vector boson fusion production modes, is very sensitive to physics Beyond the Standard Model which predicts a quartic interaction between two top quarks and two Higgs bosons. …”
Enlace del recurso

“…Since the start of ultra-relativistic heavy ion experimentation, some 10 years ago at the Brookhaven AGS and the CERN SPS, it has rarely been as gratifying to open a conference in this field as it is in Jaipur for this 3rd International Conference on Physics and Astrophysics of the Quark-Gluon-Plasma. The advent of a new generation of detectors, and most important, the availability of really heavy ion beams, has lead in the last three years to exciting new results which are of relevance to the most crucial questions this field has been addressing since 1986: are there signs for deconfinement, signs for chiral symmetry restoration, signs for equilibrium hadronic matter visible in ultra-relativistic heavy ion collisions? …”
Enlace del recurso

“…Various ways of searching for the phase transition from hadronic matter to the plasma of deconfined quarks and gluons ( QGP) in heavy ion collisions with CMS detector have been investigated: Production of ( bb) and ( cc) resonant states through their muon decay channel to study the colour-screening effect. …”
Enlace del recurso

“…The log(z) resummation results in a suppression of the small z region due to coherent gluon emission. Comparing the zeroth moment with the LEP data we find the value for the effective octet matrix element to be <\hat O_8^{\psi}(^3S_1)>=0.019 GeV^3. …”
Enlace del recurso
Enlace del recurso

“…Within the framework of the operator product expansion a simultaneous determination of the strong coupling constant alpha /sub s/, the non-perturbative operators of dimension 6 and 8 and of the gluon condensate has been performed. Different perturbative descriptions have been compared to the data. …”
Enlace del recurso

“…Within the framework of the Operator Product Expansion a simultaneous determination of the strong coupling constant alpha /sub s/, the non-perturbative operators of dimension 6 and 8 and of the gluon condensate has been performed. Different perturbative descriptions have been compared to the data. …”
Enlace del recurso
Enlace del recurso

“…In this paper we show that within the simplest extension of the SM, namely the general two-Higgs-doublet model, the FCNC top quark decays into Higgs bosons, t->(h^{0},H^{0},A^{0})+c, can be the most favored FCNC modes -- comparable or even more efficient than the gluon channel t-> g+c. In both cases the optimal results are obtained for Type II models. …”
Enlace del recurso
Enlace del recurso

“…In the second part, we investigate the role of elastic scatterings in the process of kinetic equilibration of gluons produced in the very early times of the collision. …”
Enlace del recurso

Enlace del recurso
Enlace del recurso

“…The other mechanism is due to the infrared diffusion, or the long range nature of the Coulomb field of perturbatively massless gluons. When perturbative saturation effects are taken into account, the first mechanism is rendered ineffective but the second one persists. …”
Enlace del recurso
Enlace del recurso

“…Important highlights of the work are: - Understanding of kinematical differences between fragmentation models; - Demonstration that JETSET and HERWIG behave significantly differently whereas JETSET and ARIADNE appear to be indistinguishable; - Demonstration and understanding that the application of a beam energy constraint significantly softens the impact of observable differences between JETSET and HERWIG; - A number of observations are made that the differences between JETSET and HERWIG can be considered to come from different particle production rates in those models, particularly baryon rates; - Connection between gluon radiation and the biases on the W mass due to fragmentation; - Demonstration that the reconstructed hadronic system in the $e\nu q \overline{q}$ channel is the same as that in the $\mu\nu q \overline{q}$ channel; - Documentation of results quoted for Moriond 2001; - Discussion of future studies.…”
Enlace del recurso

“…The 2 first will search after the Higgs boson, ALICE will be dedicated to the study of the quark-gluon plasma and LHC-b will gather data on the imbalance between matter and anti-matter. …”
Enlace del recurso

“…This measurements are part of a wider research program, which includes the study of gluon-rich states produced in central proton-proton collisions, that will be addressed by the COMPASS experiment in the forthcoming years. …”
Enlace del recurso

“…We describe in this report some possible strategies to measure all three components of the single top cross-section: the s-channel, the gluon-fusion channel and the associated production of a top and a W~boson. …”
Enlace del recurso

“…We calculate the leadingorder cross section for single and double Higgs production via gluon fusion obtained by means of the low-energy theorem (LET) and compare it to the result computed with full mass dependence of the new heavy vector-like fermions. …”
Enlace del recurso

“…Its main aim is to study the behavior of strongly interacting matter and the quark gluon plasma. Currently all the information sent by the 18 sub-detectors composing ALICE are read out by DATE [2] (Data Acquisition and Test Environment), the ALICE data acquisition software, using several optical links called DDL [3] (Detector Data Link), each one with a maximum throughput of 200 MB/s. …”
Enlace del recurso
Enlace del recurso