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We have calculated the effect of the inclusion of final state interactions on pion production from nuclei with incident pion beams. We find that the effect of absorption, along with geometric considerations, explains much of the enhancement…

Nuclear Theory · Physics 2009-11-07 M. Alqadi , W. R. Gibbs

We study the production of heavy multiquark states in the heavy ion collisions performed at the LHC. We assume that they are produced at the end of the quark-gluon plasma phase and then interact with light hadrons during the hadron gas…

High Energy Physics - Phenomenology · Physics 2022-09-09 L. M. Abreu , F. S. Navarra , M. Nielsen , H. P. L. Vieira

An estimate is made of the Landau-Pomeranchuk effect on the production of dileptons in a hadronic gas and in a quark-gluon plasma. For low mass dilepton pairs this effect reduces the production rate for bremsstrahlung by an order of…

High Energy Physics - Phenomenology · Physics 2009-10-22 J. Cleymans , V. V. Goloviznin , K. Redlich

Collective behaviour of final-state hadrons, and multiparton interactions are studied in high-multiplicity $ep$ scattering at a centre-of-mass energy $\sqrt{s}=318$ GeV with the ZEUS detector at HERA. Two- and four-particle azimuthal…

Multiple Parton Interactions are the tool to obtain information on the correlations between partons in the hadron structure. Partons may be correlated in all degrees of freedom and all different correlation terms contribute to the cross…

High Energy Physics - Phenomenology · Physics 2015-03-17 Giorgio Calucci , Daniele Treleani

The phases of quantum interference effects in charged lepton production by neutrinos (neutrino oscillations) following pion decay at rest and in flight, muon decay and nuclear $\beta-$decay at rest as well as for `muon oscillations'…

High Energy Physics - Phenomenology · Physics 2016-08-16 J. H. Field

Two measurements are presented of estimators sensitive to the Colour Reconnection effect in WW events at LEP2. The results are compared with various phenomenological Monte Carlo implementations of the effect. A feasibility study is…

High Energy Physics - Phenomenology · Physics 2011-09-13 J. D'Hondt

A Monte Carlo study of the polar and azimuthal angular distributions of the lepton pair arising from the decay of a $W$ or $Z$ boson produced at high transverse momentum in hadronic collisions is presented. In the absence of cuts on the…

High Energy Physics - Phenomenology · Physics 2009-10-28 E. Mirkes , J. Ohnemus

Using the EPOS3 model with UrQMD to describe the hadronic phase, we study the production of short-lived hadronic resonances and the modification of their yields and $p_{T}$ spectra in p-Pb collisions at $\sqrt{s_{NN}}$ = 5.02 TeV.…

Nuclear Theory · Physics 2021-11-24 A. G. Knospe , C. Markert , K. Werner , J. Steinheimer , M. Bleicher

We examine the hadronic interactions of quarkonia, focusing on the decays psi(2s)->psi pi pi and upsilon(2s)-> upsilon pi pi. The leading gluonic operators in the multipole expansion are matched onto the chiral lagrangian with the…

High Energy Physics - Phenomenology · Physics 2009-10-30 Jiunn-Wei Chen , Martin J. Savage

We have a very limited knowledge about how the confinement mechanism works in processes like $\epea\epe\ra\epq\epqa\ggn\ldots\ggn$, when there are identical colour charges. In this case the partons can be connected by a string or a cluster…

High Energy Physics - Phenomenology · Physics 2011-01-25 C. Friberg , G. Gustafson , J. Häkkinen

We examine Higgs boson production and decay in heavy-ion collisions at the LHC and future colliders. Owing to the long lifetime of the Higgs boson, its hadronic decays may experience little or no screening from the hot and dense quark-gluon…

High Energy Physics - Phenomenology · Physics 2019-02-06 Edmond L. Berger , Jun Gao , Adil Jueid , Hao Zhang

It is observed that the finite size of hadrons produced in high energy collisions implies that their positions are correlated, since the probability of finding two hadrons on top of each other is highly reduced. It is then shown that this…

High Energy Physics - Phenomenology · Physics 2015-06-17 A. Bialas , K. Zalewski

We apply a generalized spin-basis analysis to associated Higgs production and gauge boson pair production at LEP. This framework allows us to identify a choice of spin axes for the processes e+ e- --> ZH,ZZ which leads to strikingly…

High Energy Physics - Phenomenology · Physics 2016-08-25 Gregory Mahlon , Stephen Parke

The exchange of electroweak gauginos in the $t-$ or $u-$channel allows squark pair production at hadron colliders without color exchange between the squarks. This can give rise to events where little or no energy is deposited in the…

High Energy Physics - Phenomenology · Physics 2009-11-10 Sascha Bornhauser , Manuel Drees , Herbert K. Dreiner , Jong Soo Kim

An analysis of the spin correlation effects in top quark pair production at hadron colliders is presented with special emphasis for the Large Hadron Collider (LHC). At the LHC top quark pair production is dominated by gluon-gluon fusion.…

High Energy Physics - Phenomenology · Physics 2010-05-04 Stephen J. Parke

We briefly discuss four different possible types of transitions from quark to hadronic matter and their characteristic signatures in terms of correlations. We also highlight the effects arising from mass modification of hadrons in hot and…

Nuclear Theory · Physics 2011-08-04 T. Csorgo , Sandra S. Padula

Recent experimental data have established some of the basic features of multiple interactions in hadron-hadron collisions. The emphasis is therefore now shifting, to one of exploring more detailed aspects. Starting from a brief review of…

High Energy Physics - Phenomenology · Physics 2009-12-15 T. Sjöstrand , P. Skands

The production of the \sm\ Higgs $\phi$ with intermediate mass at the proposed CERN LEP$\otimes$LHC $ep$ collider in $\gamma q(\bar q)\rightarrow W^\pm\phi q'(\bar q')$, $\gamma q(\bar q)\rightarrow Z^0\phi q(\bar q)$ and…

High Energy Physics - Phenomenology · Physics 2009-09-25 Ghadir Abu Leil , Stefano Moretti