Search results for "Photoproduct"
showing 10 items of 511 documents
Photoproduction of light vector mesons in Xe–Xe ultraperipheral collisions at the LHC and the nuclear density of Xe-129
2018
We make predictions for cross sections of $\rho$ and $\phi$ vector meson photoproduction in ultraperipheral Xe-Xe collisions at $\sqrt{s_{NN}}=5.44$ TeV. Analyzing the momentum transfer distribution of $\rho$ mesons in this process, we explore the feasibility of extracting the nuclear density of $^{129}$Xe, which is needed in searches for dark matter with Xenon-based detectors.
Charged lepton induced one kaon production off the nucleon
2013
We study single kaon production off the nucleon induced by electrons (positrons) i.e., e(-) (e(+)) + N -> v(e) ((v) over bar (e)) + (K) over bar (K) + N' at low energies. The possibility of observing these processes with the high luminosity beams available at TJNAF and Mainz is discussed, taking into account that the strangeness conserving electromagnetic reactions have a higher energy threshold for (K) over bar (K) production. The calculations are done using a microscopic model that starts from the SU(3) chiral Lagrangians and includes background terms and the resonant mechanisms associated to the lowest lying resonance Sigma*(1385)
Charm and hidden charm scalar mesons in the nuclear medium
2009
We study the renormalization of the properties of low-lying charm and hidden charm scalar mesons in a nuclear medium, concretely of the D-s0(2317) and the theoretical hidden charm state X(3700). We find that for the D-s0(2317), with negligible width at zero density, the width becomes about 100 MeV at normal nuclear-matter density, while in the case of the X(3700) the width becomes as large as 200 MeV. We discuss the origin of this new width and trace it to reactions occurring in the nucleus, while offering a guideline for future experiments testing these changes. We also show how those medium modifications will bring valuable information on the nature of the scalar resonances and the mechan…
First measurement of the polarization observable E and helicity-dependent cross sections in single π 0 photoproduction from quasi-free nucleons
2017
The double-polarization observable $E$ and the helicity-dependent cross sections $\sigma_{1/2}$ and $\sigma_{3/2}$ have been measured for the first time for single $\pi^{0}$ photoproduction from protons and neutrons bound in the deuteron at the electron accelerator facility MAMI in Mainz, Germany. The experiment used a circularly polarized photon beam and a longitudinally polarized deuterated butanol target. The reaction products, recoil nucleons and decay photons from the $\pi^0$ meson were detected with the Crystal Ball and TAPS electromagnetic calorimeters. Effects from nuclear Fermi motion were removed by a kinematic reconstruction of the $\pi^{0}N$ final state. A comparison to data mea…
"Table_T13" of "T and F asymmetries in $��^0$ photoproduction on the proton"
2022
Target asymmetry T for c.m. energy W= 1.5432 GeV
"Table_T19" of "T and F asymmetries in $��^0$ photoproduction on the proton"
2022
Target asymmetry T for c.m. energy W= 1.6491 GeV
"Table_T12" of "T and F asymmetries in $��^0$ photoproduction on the proton"
2022
Target asymmetry T for c.m. energy W= 1.5249 GeV
"Table_T07" of "T and F asymmetries in $��^0$ photoproduction on the proton"
2022
Target asymmetry T for c.m. energy W= 1.4296 GeV
"Table_T18" of "T and F asymmetries in $��^0$ photoproduction on the proton"
2022
Target asymmetry T for c.m. energy W= 1.6319 GeV
"Table_T16" of "T and F asymmetries in $��^0$ photoproduction on the proton"
2022
Target asymmetry T for c.m. energy W= 1.5970 GeV