Searches for the Dark Photon at Fixed Target Experiments

2016 ◽  
Vol 66 (8) ◽  
pp. 1036-1044
Author(s):  
Suyong CHOI*
Keyword(s):  
Fixed Target ◽  
Fixed Target Experiments ◽  
Dark Photon

scholarly journals Interactions of Beams with Surroundings

2020 ◽  
pp. 183-203
Author(s):  
M. Brugger ◽  
H. Burkhardt ◽  
B. Goddard ◽  
F. Cerutti ◽  
R. G. Alia
Keyword(s):  
High Energy Physics ◽  
High Energy ◽  
Fixed Target ◽  
Fixed Target Experiments ◽  
Secondary Particles ◽  
Radiation Sources ◽  
Residual Gas ◽  
The Impact ◽  
High Energy Particles ◽  
Energy Physics

AbstractWith the exceptions of Synchrotron Radiation sources, beams of accelerated particles are generally designed to interact either with one another (in the case of colliders) or with a specific target (for the operation of Fixed Target experiments, the production of secondary beams and for medical applications). However, in addition to the desired interactions there are unwanted interactions of the high energy particles which can produce undesirable side effects. These interactions can arise from the unavoidable presence of residual gas in the accelerator vacuum chamber, or from the impact of particles lost from the beam on aperture limits around the accelerator, as well as the final beam dump. The wanted collisions of the beams in a collider to produce potentially interesting High Energy Physics events also reduces the density of the circulating beam and can produce high fluxes of secondary particles.

scholarly journals Searching for dark sector with missing mass technique in fixed target experiments

2019 ◽  
Vol 212 ◽  
pp. 06001 ◽  
Author(s):  
Venelin Kozhuharov
Keyword(s):  
Final States ◽  
Dark Sector ◽  
Initial State ◽  
Missing Mass ◽  
Fixed Target Experiments ◽  
Hidden Sector ◽  
Dark Photon ◽  
Precise Knowledge ◽  
Viable Solution ◽  
Experimental Approaches

Currently, the existence of a dark sector almost completely decoupled from the Standard Model is a viable solution for numerous long-standing problems in physics, including the nature of dark matter and the muon anomalous magnetic moment. A new gauge mediator, the dark photon, could be the portal to this hidden sector. The most general probe to its existence is the missing mass technique which requires a precise knowledge of the initial state of the process but does not put constraints on the dark photon final states. The experimental approaches to the search for dark photons in positron-on-target annihilation and in mesons decay in flight are presented and the physics reach is discussed.

scholarly journals Effects of azimuth-symmetric acceptance cutoffs on the measured asymmetry in unpolarized Drell-Yan fixed-target experiments

2013 ◽  
Vol 49 (4) ◽  
Author(s):  
A. Bianconi ◽  
M. P. Bussa ◽  
M. Destefanis ◽  
L. Ferrero ◽  
M. Greco ◽  
...  
Keyword(s):  
Fixed Target ◽  
Fixed Target Experiments ◽  
Measured Asymmetry

Charmonium production in fixed-target experiments with SPS and LHC beams at CERN

2011 ◽  
Vol 74 (3) ◽  
pp. 446-452 ◽  
Author(s):  
A. B. Kurepin ◽  
N. S. Topilskaya ◽  
M. B. Golubeva
Keyword(s):  
Fixed Target ◽  
Fixed Target Experiments ◽  
Charmonium Production

scholarly journals Searching for axino-like particle at fixed target experiments

2020 ◽  
Vol 27 ◽  
pp. 100460 ◽  
Author(s):  
Ki-Young Choi ◽  
Takeo Inami ◽  
Kenji Kadota ◽  
Inwoo Park ◽  
Osamu Seto
Keyword(s):  
Fixed Target ◽  
Fixed Target Experiments

scholarly journals Quarkonium Production at Z0 and in ϒ(1S) Decay

1997 ◽  
Vol 12 (22) ◽  
pp. 3931-3940
Author(s):  
Kingman Cheung ◽  
Wai-Yee Keung ◽  
Tzu Chiang Yuan
Keyword(s):  
Color Singlet ◽  
Fixed Target ◽  
Production Rates ◽  
Fixed Target Experiments ◽  
Color Octet ◽  
Quarkonium Production ◽  
Color Octet Mechanism

The conventional color-singlet model was challenged by the recent data on quarkonium production. Discrepancies in production rates were observed at the Tevatron, at LEP, and in fixed-target experiments. The newly advocated color-octet mechanism provides a plausible solution to the anomalous quarkonium production observed at the Tevatron. The color-octet mechanism should also affect other quarkonium production channels. In this paper we will summarize the studies of quarkonium production in Z0 and ϒ decays.

scholarly journals DARK FORCES SEARCHES IN FIXED TARGET EXPERIMENTS

2014 ◽  
Vol 35 ◽  
pp. 1460392
Author(s):  
M. BATTAGLIERI
Keyword(s):  
Nuclear Physics ◽  
Electromagnetic Current ◽  
Beyond The Standard Model ◽  
Fixed Target ◽  
Accelerator Facility ◽  
Fixed Target Experiments ◽  
Jefferson Lab ◽  
Hidden Sector ◽  
The Standard Model ◽  
Massive Boson

Searches for physics Beyond the Standard Model (BSM) can be carried out with precise and GeV-energy-range experiments. In many string theories, a Hidden Sector, decoupled to the SM, foresees the existence of a new massive boson, the A′ or heavy photon, that weakly couples to the electromagnetic current. A new particle with mass in the range of 1 MeV - 1 GeV could explain many astro-particle observations (e.g. positron excess seen by PAMELA and AMS experiments) and some anomalies not yet fully understood (e.g. muon g - 2 factor). The search for A′ has motivated intense experimental activities in almost every accelerator facility using different techniques: colliding beam, fixed target experiments, meson rare decays. Jefferson Lab, a world-leading nuclear physics laboratory, is planning a set of fixed target experiments aiming to discover the A′ or set new limits in its mass and coupling, with an unprecedented sensitivity and reach capability. In this contribution, after reviewing the physics case and some experimental evidences, I will report on the program of measurements planned at Jefferson Lab for the next years.

scholarly journals Fixed target experiments at the Fermilab Tevatron

2014 ◽  
Vol 29 (28) ◽  
pp. 1446008 ◽  
Author(s):  
Gaston Gutierrez ◽  
Marco A. Reyes
Keyword(s):  
Center Of Mass ◽  
Partial Wave Analysis ◽  
Fixed Target ◽  
Liquid Hydrogen Target ◽  
Hydrogen Target ◽  
Fixed Target Experiments ◽  
Center Of Mass Energy ◽  
Diffractive Production ◽  
Target Program ◽  
Central Production

This paper presents a review of the study of Exclusive Central Production at a center-of-mass energy of [Formula: see text] at the Fermilab Fixed Target program. In all reactions reviewed in this paper, protons with an energy of 800 GeV were extracted from the Tevatron accelerator at Fermilab and directed to a Liquid Hydrogen target. The states reviewed include [Formula: see text], ϕϕ and D*±. Partial Wave Analysis results will be presented on the light states but only the cross-section will be reviewed in the diffractive production of D*±.

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