101 research outputs found
Realistic Simulation of BM@N GEM Detectors: Model Implementation and Testing
The Lorentz shift of electrons in a magnetic field is taken into account with simulating the response of a GEM detector for the BM@N experiment. Dependences of the determined coordinate x on the track angle, the values of the Lorentz shift of electrons and its dispersion for the gas mixture ArC4H10 were obtained. The momentum resolution was obtained as a function of the momentum for the deuteron-carbon (dC) process, and the invariant mass of the Λ-hyperon was determined. The obtained results are close to the first results of experimental data collected in the technical run in interactions of the deuteron beam of 4 AGeV with different targets
The BM@N Experiment at JINR: Status and Physics Program
BM@N (Baryonic Matter at Nuclotron) is the first experiment to be realized at the accelerator complex of NICA-Nuclotron at JINR (Dubna, Russia). The aim of the experiment is to study interactions of relativistic heavy ion beams with energy up to of strange mesons, multi-strange hyperons and light hyper-nuclei which are produced in nucleus-nucleus collisions close to the kinematic threshold. The BM@N set-up, the experimental program and first results of technical runs are presented
Photon 2003: a theorist's summary and outlook
In this talk I present a summary of some of the discussions at the conference
on various topics in Photon physics, selected with a view to give a theorist's
perspective, of the current status and future prospects, of the developments in
the field. After discussing some of the recent theoretical developments in the
subject of Photon Structure function, I will focus on what the photon has
helped us learn about the spin structure of a proton, aspects of perturbative
and nonperturbative QCD as well as forward and diffractive physics. I will
discuss the challenges that the data on heavy flavour production in the two
photon reactions and in photo production, seem to have presented to the
theorists. Then I discuss the direction in which photon physics is likely to go
in future and what we {\em need} the photons to still tell us. I will end by
talking about the newer developments in prospects for photon studies at future
colliders and opportunities that these will provide us to learn about the
physics beyond the Standard Model.Comment: 17 pages, LaTeX, uses espcrc2.sty, 12 figures, Summary talk presented
by R.M. Godbole at PHOTON-2003, International Meeting on Structure and
Interactions of the Photon, Frascati, Italy, April 7-11, 200
Triple GEM Tracking Detectors for the BM@N Experiment
BM@N (Baryonic Matter at the Nuclotron) is the fixed target experiment aimed to study nuclear matter in the relativistic heavy ion collisions at the Nuclotron accelerator in JINR. The BM@N tracking system is based on Gas Electron Multipliers (GEM) detectors, mounted inside the BM@N analyzing magnet. The structure of the GEM detectors and the results of study of their characteristics are presented. The GEM detectors are integrated into the BM@N experimental setup and data acquisition system. The results of the first test of the GEM tracking system in the technical run with the deuteron beam are shortly reviewed
On Regge kinematics in SCET
We discuss the kinematics of the particles that make up a Reggeon in field
theory, using the terminology of the Soft Collinear Effective Theory (SCET).
Reggeization sums a series of strongly-ordered collinear emissions resulting in
an overall Reggeon exchange that falls in the Glauber or Coulomb kinematic
region. This is an extremely multi-scale problem and appears to fall outside of
the usual organizing scheme of SCET.Comment: 7 pages, 3 figure
Production of {\pi}+ and K+ mesons in argon-nucleus interactions at 3.2 AGeV
First physics results of the BM@N experiment at the Nuclotron/NICA complex
are presented on {\pi}+ and K+ meson production in interactions of an argon
beam with fixed targets of C, Al, Cu, Sn and Pb at 3.2 AGeV. Transverse
momentum distributions, rapidity spectra and multiplicities of {\pi}+ and K+
mesons are measured. The results are compared with predictions of theoretical
models and with other measurements at lower energies.Comment: 29 pages, 20 figure
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