120678530
A Monte Carlo model for diffractive dissociation in hadron-hadron collisions at high energies
We present a Monte Carlo generator for single diffractive dissociation in hadron-hadron collisions at high energies. The generator, which is based on some kinematic consideration and involves the minimum of theoretical hypothesis, reproduces the experimental data. Such a generator is useful to study the phenomenology of diffractive processes and to explore important roles of diffractive processes in cosmic ray interaction and propagation in the atmosphere and in interstellar space.
119956852
Energy quantization and intermittency in multiparticle production
We propose a simple model to describe the multiparticle production in high-energy hadronic interactions. As a result of energy quantization of the excitation system formed in collisions, the model naturally explains the intermittency phenomenon as well as other properties in multiparticle productions.
125171892
Anti-Lambda / anti-p ratios in heavy ion collisions at 11.6-A/GeV/c
119941320
Probability description of final-state distribution in independent fragmentation model
119271438
Search for Chiral Magnetic Effects in High-Energy Nuclear Collisions
Abstract We present measurements of pion elliptic flow ( ν 2 ) in Au + Au collisions at s N N = 200 , 62.4 , 39 , 27 and 19.6 GeV , as a function of event-by-event charge asymmetry ( A ± ) , based on data from the STAR experiment at RHIC. We find that π − ( π + ) elliptic flow linearly increases (decreases) with charge asymmetry for most centrality bins and for all the beam energies under study. The slope parameter ( r ) from ν 2 ( A ± ) difference between π − and π + shows a centrality dependency similar to calculations of the Chiral Magnetic Wave. The measurements of charge separation with respect to the reaction plane in search of Local Parity Violation and the Chiral Magnetic Effect are also presented for Au+Au collisions at s N N = 200 , 62.4 , 39 , 27 , 19.6 , 11.5 and 7.7 GeV , and for U + U collisions at 193 GeV.
122537214
Search for local parity violation with STAR ZDC-SMD
Parity-odd domains are predicted to lead to charge separation of quarks along the orbital momentum of the system created in non-central relativistic heavy ion collisions. A signal consistent with several of the theoretical expectations has been detected by STAR, with a three particle azimuthal correlator which is a -even observable, but still sensitive to the charge separation effect. In this correlator, the first two particles are used to reveal the physics of interest, and the third particle serves as a reference for the reaction plane. In this work, to minimize the non-parity correlation between the third particle and the first two, we utilize the spectator neutrons detected by STAR ZDC-SMDs to define the event plane. The 1st-order event plane thus obtained can also be used to study the global strong parity violation effect, and to provide further systematic checks for this analysis. We report measurements of both -even and -odd observables using the STAR ZDC-SMDs in Au+Au at 200 GeV. The results are presented as a function of collision centrality, particle separation in rapidity and transverse momentum (pT). Systematic checks on the impact from the directed flow will also be discussed.
120854804
DECAY CONSTANTS OF S AND P WAVE MESONS
The decay constants of S wave and P wave heavy mesons are computed by means of the relativistic (instantaneous) Salpeter equation.
119479770
Method for determining event-by-event elliptic flow fluctuations based on the first-order event plane in heavy-ion collisions
A new method is presented for determining event-by-event fluctuations of elliptic flow, v{sub 2}, using first-order event planes. By studying the event-by-event distributions of v{sub 2} observables and first-order event-plane observables, average flow and event-by-event flow fluctuations can be separately determined, making appropriate allowance for the effects of finite multiplicity and nonflow. The method has been tested with Monte Carlo simulations. The connection between flow fluctuations and fluctuations of the initial-state participant eccentricity is discussed.
123145784
OZI-ALLOWED TWO BODY ϒ DECAYS IN THE 3P0 MODEL WITH THE RELATIVISTIC WAVE FUNCTIONS
We combine the Bethe–Salpeter method with the 3P0 model to describe OZI-allowed two body meson decays. In this combined method, the relativistic wave functions defined in the Salpeter equation show up in the decay amplitude of the 3P0 model automatically. We apply the method to OZI-allowed ϒ(4S, 5S, 6S) two body decays. The results are roughly consistent with the experimental data and the predictions of ϒ(6S) decays are given.