M. Nozar - for the CLAS collaboration

M. Nozar
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M. Nozar
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for the CLAS collaboration
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High Energy Physics - Experiment (9)
 
Nuclear Experiment (2)

Publications Authored By M. Nozar

Structure functions, as measured in lepton-nucleon scattering, have proven to be very useful in studying the quark dynamics within the nucleon. However, it is experimentally difficult to separately determine the longitudinal and transverse structure functions, and consequently there are substantially less data available for the longitudinal structure function in particular. Here we present separated structure functions for hydrogen and deuterium at low four--momentum transfer squared, Q^2< 1 GeV^2, and compare these with parton distribution parameterizations and a k_T factorization approach. Read More

The TWIST collaboration has performed new measurements of two of the parameters that describe muon decay: $\rho$, which governs the shape of the overall momentum spectrum, and $\delta$, which governs the momentum dependence of the parity-violating decay asymmetry. This analysis gives the results $\rho=0.75014\pm 0. Read More

A search for exotic mesons in the $\pi^{+}\pi^{+}\pi^{-}$ system photoproduced by the charge exchange reaction $\gamma p\to \pi^{+}\pi^{+}\pi^{-}(n)$ was carried out by the CLAS collaboration at Jefferson Lab. A tagged-photon beam with energies in the 4.8 to 5. Read More

The exclusive reaction $\pi^- p \to \eta \pi^0 n$, $\eta \to \pi^+ \pi^- \pi^0$ at 18 GeV$/c$ has been studied with a partial wave analysis on a sample of 23~492 $\eta \pi^0 n$ events from BNL experiment E852. A mass-dependent fit is consistent with a resonant hypothesis for the $P_+$ wave, thus providing evidence for a neutral exotic meson with $J^{PC} = 1^{-+}$, a mass of $1257 \pm 20 \pm 25$ MeV$/c^2$, and a width of $354 \pm 64 \pm 60$ MeV$/c^2$. New interpretations of the meson exotics in neutral $\eta \pi^0$ system observed in E852 and Crystal Barrel experiments are discussed. Read More

The $3\pi$ system produced in the reaction $\gamma p \to \pi^{+}\pi^{+}\pi^{-} n$ at $4.8-5.4$ GeV is investigated from the E01-017 (g6c) running of CLAS. Read More

2003Aug
Authors: Mina Nozar1
Affiliations: 1for the CLAS collaboration

Photo-production of excited mesons in the 1-2 GeV mass range decaying via multi-pion or multi-kaon emission has been investigated at the TJNAF\thanks{This work was supported by the U.S. Department of Energy and The U. Read More

The reaction pim p --> omega pim p, omega --> pip pim pi0 has been studied at 18 GeV/c. The omega pim mass spectrum is found to be dominated by the b1(1235). Partial Wave Analysis shows that b1 production is dominated by natural parity exchange. Read More

1995Oct
Affiliations: 1Univ. of Notre Dame, 2Univ. of Notre Dame, 3Univ. of Notre Dame, 4Univ. of Notre Dame, 5Univ. of Notre Dame, 6Univ. of Notre Dame, 7Univ. of Notre Dame, 8Univ. of Notre Dame, 9Univ. of Notre Dame, 10Univ. of Notre Dame, 11Brookhaven National Lab., 12Brookhaven National Lab., 13Brookhaven National Lab., 14Brookhaven National Lab., 15Brookhaven National Lab., 16Institute for High Energy Phys., Protvino, Russian Federation, 17Institute for High Energy Phys., Protvino, Russian Federation, 18Institute for High Energy Phys., Protvino, Russian Federation, 19Institute for High Energy Phys., Protvino, Russian Federation, 20Institute for High Energy Phys., Protvino, Russian Federation, 21Indiana Univ., 22Indiana Univ., 23Indiana Univ., 24Indiana Univ., 25Indiana Univ., 26Indiana Univ., 27Indiana Univ., 28Indiana Univ., 29Indiana Univ., 30Indiana Univ., 31Univ. of Mass. at Dartmouth, 32Univ. of Mass. at Dartmouth, 33Univ. of Mass. at Dartmouth, 34Univ. of Mass. at Dartmouth, 35Univ. of Mass. at Dartmouth, 36Univ. of Mass. at Dartmouth, 37Inst. for Nuc. Phys., Moscow State Univ., 38Inst. for Nuc. Phys., Moscow State Univ., 39Inst. for Nuc. Phys., Moscow State Univ., 40Inst. for Nuc. Phys., Moscow State Univ., 41Inst. for Nuc. Phys., Moscow State Univ., 42Inst. for Nuc. Phys., Moscow State Univ., 43Inst. for Nuc. Phys., Moscow State Univ., 44Inst. for Nuc. Phys., Moscow State Univ., 45Inst. for Nuc. Phys., Moscow State Univ., 46Inst. for Nuc. Phys., Moscow State Univ., 47Inst. for Nuc. Phys., Moscow State Univ., 48Northwestern Univ., 49Northwestern Univ., 50Northwestern Univ., 51Northwestern Univ., 52Northwestern Univ., 53RPI, 54RPI, 55RPI, 56RPI, 57RPI

The recent search for non $q \bar{q}$ mesons in $\pi^{-}p$ interactions at Brookhaven National Laboratory is summarized. Many final states such as $\eta \pi$, $\eta' \pi^{-}$, $a_{0} \pi$, $f_{1} \pi$, $a_{2} \pi$, $b_{1} \pi$, which are favored decay modes of exotics, are under investigation. Read More