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Applying general symmetry properties of electromagnetic interaction, information from electron proton elastic scattering data can be related to charge asymmetry in the annihilation channels $e^++e^-\leftrightarrow \bar p + p$ and to the…

High Energy Physics - Phenomenology · Physics 2009-11-16 Egle Tomasi-Gustafsson

We show that the "ridge" phenomenon in the two-particle angular correlation function, as observed by the CMS experiment, can be reproduced by implementing an impact parameter dependent azimuthal correlation of the scattering planes of…

High Energy Physics - Phenomenology · Physics 2012-05-17 Sara Alderweireldt , Pierre Van Mechelen

We present a thorough phenomenological analysis of the experimental data from Belle Collaboration for the transverse $\Lambda$ and $\bar\Lambda$ polarisation, measured in $e^+e^-$ annihilation processes, for the case of inclusive (plus a…

High Energy Physics - Phenomenology · Physics 2020-09-09 Umberto D'Alesio , Francesco Murgia , Marco Zaccheddu

We have measured the distributions of the jet energies in e+e- --> qq^bar g events, and of the three orientation angles of the event plane, using hadronic $Z^0$ decays collected in the SLD experiment at SLAC. We find that the data are well…

High Energy Physics - Experiment · Physics 2008-11-26 K. Abe

Results on high transverse momentum charged particle emission with respect to the reaction plane are presented for Au+Au collisions at $\sqrt{s_{_{NN}}}$= 200 GeV. Two- and four-particle correlations results are presented as well as a…

Nuclear Experiment · Physics 2012-08-27 STAR Collaboration

We provide complete analytic expressions for the isolated prompt photon production cross section in $e^+e^-$ annihilation reactions through one-loop order in quantum chromodynamics (QCD) perturbation theory. Functional dependences on the…

High Energy Physics - Phenomenology · Physics 2009-10-28 Edmond L. Berger , Xiaofeng Guo , Jianwei Qiu

The longitudinal long-range correlations of the triangular flow event plane angles are calculated in a Boltzmann + hydrodynamics hybrid approach. The potential to disentangle different energy deposition scenarios is explored by utilizing…

Nuclear Theory · Physics 2013-05-29 Hannah Petersen , Carsten Greiner , Vivek Bhattacharya , Steffen A. Bass

The advent of back-scattered laser beams for electron-positron colliders will allow detailed studies of a large array of high energy photon-photon and photon-electron collision processes with polarized beams. These include tests of…

High Energy Physics - Phenomenology · Physics 2009-09-11 Stanley J. Brodsky

Using the CUJET3=DGLV+VISHNU jet-medium interaction framework, we show that dijet azimuthal acoplanarity in high energy $A+A$ collisions is sensitive to possible non-perturbative enhancement of the jet transport coefficient, $\hat{q}(T,E)$,…

High Energy Physics - Phenomenology · Physics 2021-02-03 M. Gyulassy , P. M. Jacobs , J. Liao , S. Shi , X. N. Wang , F. Yuan

Mixed harmonic charge dependent azimuthal correlations at mid-rapidity in Pb-Pb collisions at \sqrt{s_{NN}} = 2.76 TeV were measured with the ALICE detector at the LHC. A clear charge dependence for a series of correlations is observed both…

Nuclear Experiment · Physics 2019-08-14 Y. Hori

Single particle inclusive energy spectra in $e^+e^-$ annihilation are analyzed in terms of moments. By assuming Local Parton Hadron Duality (LPHD), experimental data in a wide c.m. energy range from 3 GeV up to LEP energy are compared to…

High Energy Physics - Phenomenology · Physics 2007-05-23 Sergio Lupia

The perturbative QCD approach to multiparticle production assuming Local Parton Hadron Duality (LPHD) and some recent results are discussed. Finite asymptotic scaling limits are obtained for various observables, after an appropriate…

High Energy Physics - Phenomenology · Physics 2011-04-15 Wolfgang Ochs

I survey a number of interesting tests of quantum chromodynamics at the amplitude level which can be carried out in electron-positron annihilation and in photon-photon collisions at low energy, including measurements of fundamental…

High Energy Physics - Phenomenology · Physics 2009-09-11 S. J. Brodsky

Ultrarelativistic heavy-ion collisions provide a unique window into far-from-equilibrium states of QCD matter. The initial stages of these events are characterized by highly anisotropic, nonthermal dynamics that precede hydrodynamization,…

High Energy Physics - Phenomenology · Physics 2025-12-22 João Barata , José Guilherme Milhano , Andrey V. Sadofyev , João M. Silva

High momentum jets and hadrons are important probes for the quark gluon plasma (QGP) formed in nuclear collisions at high energies. We investigate how fluctuations in the background density of the QGP and fluctuations in the spatial…

Nuclear Theory · Physics 2012-12-18 Ricardo Rodriguez-Pedraza , Rainer J. Fries

Studies of longitudinal correlations of the charged-particle multiplicity in heavy-ion collisions have provided insights into the asymmetry and fluctuations of the initial-state collision geometry. In addition to the expansion of the medium…

Nuclear Experiment · Physics 2022-01-26 Saehanseul Oh

We study the process of electron-positron annihilation into back-to-back jets, where in each jet a pair of hadrons is detected. The orientation of these two pairs with respect to each other can be used to extract the interference…

High Energy Physics - Phenomenology · Physics 2009-11-10 Daniel Boer , Rainer Jakob , Marco Radici

Within A Multi-Phase Transport model, we investigate decorrelation of event planes over pseudorapidity and its effect on azimuthal anisotropy measurements in relativistic heavy-ion collisions. The decorrelation increases with increasing…

Nuclear Theory · Physics 2013-05-30 Kai Xiao , Feng Liu , Fuqiang Wang

We investigate the possibility of selecting heavy ion collision events with certain features in the initial state ("event engineering"). Anisotropic flow measurements in heavy ion reactions have confirmed the almost ideal fluid dynamical…

Nuclear Theory · Physics 2013-11-13 Hannah Petersen , Berndt Muller

Long-range correlations for pairs of charged particles with two-particle angular correlations are studied in $pp$ at ${\sqrt{{\textit s}}}=13$~TeV with various Monte Carlo generators. The correlation functions are constructed as functions…

High Energy Physics - Phenomenology · Physics 2023-03-13 SuJeong Ji , Maxim Virta , Teemu Kallio , SangHoon Lim , Dong Jo Kim