Simulation of gamma and hadron showers in the energy range 100GeV- 25TeV has been carried out. For a big ideal Cherenkov light array, characteristics of lateral distribution of Cherenkov photon density have been studied. Results from this ideal detector are compared with those simulated for a real TUNKA- like array to investigate experimental potential of using existence of a hump in lateral di...

In this work, we introduce some new $U(1)$ symmetry groups of the free fermionic action in euclidean space-time, which are a consequence parity and time-reversal symmetries. Afterwards, discuss how introduction gauge interaction affects invariance action, with special reference to QCD. Moreover, inspired by recent QCD lattice results \textit{Glozman et al.}, an interesting unexpected group has ...

The nature of nucleon resonances is still being debated, while much experimental data are accumulated. In this work, we focus on the negative parity resonance ${N}^{*}(1895)$ which located in scattering region various meson-baryon coupled channels, and such dynamics can be crucial understanding its properties. To test relevance hadron dynamics, investigate decay properties detail. We examine ho...

conclusions increment in the number of parity can lead to decrease antioxidant defense mechanisms in multiparous women and their newborns. so, control of oxidative stress is considered to be beneficial in multiparous women. background parturition has been associated with free radicals, itself linked with poor pregnancy outcome. objectives this study aimed to investigate the relationship between...

This talk summarizes recent QCD results from HERA, the Tevatron Collider and Tevatron fixed target experiments.

Events with an isolated high pT lepton, a hadron jet and missing energy as observed in the H1 experiment at HERA, are potentially associated with R-parity violation in supersymmetric theories. However, stringent kinematic constraints must be fulfilled if the production of supersymmetric particles in R-parity violating scenarios were the correct path for explaining these puzzling events. A refer...

The $X(3872)$, whose mass coincides with the $D^0\bar D^{*0}$ threshold, is most extended hadron object. Since its discovery in 2003, debates have never stopped regarding internal structure. We propose a new object, $X$ atom, which $D^\pm D^{*\mp}$ composite system positive charge parity and of $(3879.89\pm0.07)$ MeV, formed mainly due to Coulomb force. show that null signal atom can be used pu...

Symmetries play important roles in the understanding of hadron structures and spectroscopy. Motivated by discovery doubly charmed tetraquark $T_{cc}^+(3875)$, we study ground states heavy tetraquarks with QCD inspired antiquark-diquark symmetry constituent quark model. Six $T_{QQ} (Q=c,b)$ are predicted lightest $T_{cc}$ state has a mass $3875.8\pm 7.6$ MeV spin-parity $1^+$ which consistent th...

In this paper we study the effects of the possible presence of time-reversal ~T! odd distribution functions in leptoproduction. We limit ourselves to the production of hadrons in the current fragmentation region, for which we assume that the cross section factorizes into a product of a distribution function and a fragmentation function. Including the effects of transverse momenta, the cross sec...

The $X(3872)$, whose mass coincides with the $D^0\bar D^{*0}$ threshold, is most extended hadron object. Since its discovery in 2003, debates have never stopped regarding internal structure. We propose a new object, $X$ atom, which $D^\pm D^{*\mp}$ composite system positive charge parity and of $(3879.89\pm0.07)$ MeV, formed mainly due to Coulomb force. show that null signal atom can be used pu...