scholarly journals News on mean pion multiplicity from NA61/SHINE

2018 ◽  
Vol 171 ◽  
pp. 16006
Author(s):  
Michał Naskręt
Keyword(s):  
Charged Pion ◽  
Fixed Target ◽  
Pion Multiplicity ◽  
Wide Range ◽  
Rapidity Distributions ◽  
Target Experiment ◽  
The Mean ◽  
Using Data ◽  
Large Acceptance ◽  
Fixed Target Experiment

NA61/SHINE is a large acceptance fixed target experiment at the CERN SPS which studies final hadronic states in interactions between various particles and nuclei [1]. The main topic of this contribution are preliminary results for mean negatively charged pion multiplicities 〈π−〉 from central Ar+Sc and Be+Be collisions. The data were taken recently by the NA61/SHINE collaboration for a wide range of beam momenta. Measured rapidity distributions [see formula in PDF] were extrapolated to unmeasured regions to obtain total multiplicities 〈π−〉 A new scheme to calculate the mean number of wounded nucleons 〈W〉 utilizing the EPOS MC model is described. Using data from other experiments, a comparison of [see formula in PDF]for different collisions and beam momenta is discussed.

J-PARC heavy ion experiment

2020 ◽  
pp. 2040005
Author(s):  
Takashi Hachiya
Keyword(s):  
High Speed ◽  
Ion Beam ◽  
Dense Matter ◽  
Heavy Ion ◽  
Current Status ◽  
Fixed Target ◽  
Ion Collisions ◽  
Target Experiment ◽  
Large Acceptance ◽  
Fixed Target Experiment

J-PARC Heavy Ion project (J-PARC-HI) is a future fixed target experiment to study the properties of the dense matter created by the heavy-ion collisions with 1–12[Formula: see text]AGeV/[Formula: see text] at J-PARC. This project aims to search for the QCD phase boundary and its critical endpoint and to study the equation of state of the dense matter at J-PARC. For this purpose, the high-intensity beam and the precision detector with high-speed DAQ are necessary. J-PARC will be upgraded to produce the world’s highest intensity of heavy-ion beam by adding a new compact heavy-ion linac and a booster ring and utilizing the existing RCS and MR synchrotrons. We will construct the multi-purpose spectrometer with a large acceptance to measure hadrons, dileptons and photons, and their correlations and fluctuations. In these proceedings, we will report the current status of the project, the design of the detector configuration, and detector R&D.

scholarly journals The PANDA Detector at FAIR

2019 ◽  
Vol 64 (7) ◽  
pp. 640 ◽  
Author(s):  
M. Schmidt
Keyword(s):  
Particle Identification ◽  
Accelerator Complex ◽  
Fixed Target ◽  
Strong Magnetic Fields ◽  
Open Questions ◽  
Wide Range ◽  
Target Experiment ◽  
Under Construction ◽  
Panda Detector ◽  
Fixed Target Experiment

PANDA is a fixed-target experiment that is going to address a wide range of open questions in the hadron physics sector by studying the interactions between antiprotons with high momenta and a stationary proton target. The PANDA detector is currently under construction and will be situated in the HESR that is a part of the future FAIR accelerator complex on the area of the GSI Helmholtzzentrum f¨ur Schwerionenforschung in Darmstadt. The key features of the detector are: the precise tracking in strong magnetic fields, excellent particle identification, and high-resolution calorimeters.

scholarly journals Spin physics at a fixed-target experiment at the LHC (AFTER@LHC)

2014 ◽  
Vol 45 (1) ◽  
pp. 336-337 ◽  
Author(s):  
A. Rakotozafindrabe ◽  
M. Anselmino ◽  
R. Arnaldi ◽  
S. J. Brodsky ◽  
V. Chambert ◽  
...  
Keyword(s):  
Fixed Target ◽  
Spin Physics ◽  
Target Experiment ◽  
Fixed Target Experiment

scholarly journals Feasibility Studies for Quarkonium Production at a Fixed-Target Experiment Using the LHC Proton and Lead Beams (AFTER@LHC)

2015 ◽  
Vol 2015 ◽  
pp. 1-15 ◽  
Author(s):  
L. Massacrier ◽  
B. Trzeciak ◽  
F. Fleuret ◽  
C. Hadjidakis ◽  
D. Kikola ◽  
...  
Keyword(s):  
Feasibility Studies ◽  
Fixed Target ◽  
Detection Techniques ◽  
Target Mode ◽  
Quarkonium Production ◽  
Target Experiment ◽  
Conventional Detection ◽  
Fixed Target Experiment

Being used in the fixed-target mode, the multi-TeV LHC proton and lead beams allow for studies of heavy-flavour hadroproduction with unprecedented precision at backward rapidities, far negative Feynman-x, using conventional detection techniques. At the nominal LHC energies, quarkonia can be studied in detail inp+p,p+d, andp+Acollisions atsNN≃115 GeV and in Pb +pand Pb +Acollisions atsNN≃72 GeV with luminosities roughly equivalent to that of the collider mode that is up to 20 fb−1 yr−1inp+pandp+dcollisions, up to 0.6 fb−1 yr−1inp+Acollisions, and up to 10 nb−1 yr−1in Pb +Acollisions. In this paper, we assess the feasibility of such studies by performing fast simulations using the performance of a LHCb-like detector.

scholarly journals Prospective for A Fixed-Target ExpeRiment at the LHC: AFTER @ LHC

2013 ◽  
Author(s):  
Jean-Philippe Lansberg ◽  
Valérie Chambert ◽  
Jean-Pierre Didelez ◽  
Bernard Genolini ◽  
Cynthia Hadjidakis ◽  
...  
Keyword(s):  
Fixed Target ◽  
Target Experiment ◽  
Fixed Target Experiment

scholarly journals Prospective for a fixed-target experiment at the LHC: AFTER @ LHC

2012 ◽  
Author(s):  
Jean-Philippe Lansberg ◽  
Valérie Chambert ◽  
Jean-Pierre Didelez ◽  
Bernard Genolini ◽  
Cynthia Hadjidakis ◽  
...  
Keyword(s):  
Fixed Target ◽  
Target Experiment ◽  
Fixed Target Experiment

scholarly journals Feasibility Studies for Single Transverse-Spin Asymmetry Measurements at a Fixed-Target Experiment Using the LHC Proton and Lead Beams (AFTER@LHC)

2017 ◽  
Vol 58 (4) ◽  
Author(s):  
Daniel Kikoła ◽  
Miguel García Echevarria ◽  
Cynthia Hadjidakis ◽  
Jean-Philippe Lansberg ◽  
Cédric Lorcé ◽  
...  
Keyword(s):  
Spin Asymmetry ◽  
Feasibility Studies ◽  
Transverse Spin ◽  
Fixed Target ◽  
Target Experiment ◽  
Fixed Target Experiment

scholarly journals News from the NA61/SHINE experiment

2018 ◽  
Vol 191 ◽  
pp. 05002 ◽  
Author(s):  
Evgeny Andronov
Keyword(s):  
Critical Point ◽  
Collision Energy ◽  
Hadron Production ◽  
Fixed Target ◽  
Proton Proton ◽  
Model Predictions ◽  
The Status ◽  
Target Experiment ◽  
Onset Of Deconfinement ◽  
Fixed Target Experiment

NA61/SHINE is a fixed target experiment operating at the CERN SPS. Its main goals are to search for the critical point of strongly interacting matter and to study the onset of deconfinement. For these goals a scan of the two dimensional phase diagram (T-μB) is being performed at the SPS by measurements of hadron production in proton-proton, proton-nucleus and nucleusnucleus interactions as a function of collision energy. In this paper the status of the NA61/SHINE strong interaction physics programme is presented including recent results on proton intermittency, strongly intensive fluctuation observables of multiplicity and transverse momentum fluctuations. These measurements are expected to be sensitive to the correlation length in the produced matter and, therefore, have the ability to reveal the existence of the critical point via possible non-monotonic behavior. The NA61/SHINE results are compared to the model predictions.

Experimental investigation of the instability of a sedimenting suspension of fibres

2007 ◽  
Vol 575 ◽  
pp. 307-332 ◽  
Author(s):  
BLOEN METZGER ◽  
JASON E. BUTLER ◽  
ÉLISABETH GUAZZELLI
Keyword(s):  
Vertical Component ◽  
Orientation Distribution ◽  
Velocity Fluctuations ◽  
Image Velocimetry ◽  
Wide Range ◽  
Fluid Properties ◽  
The Mean ◽  
Using Data ◽  
Horizontal Wavelength ◽  
Short Times

Observations of the flow structures formed by rigid fibres of high aspect ratio sedimenting within a viscous fluid at a Reynolds number of approximately 10−4 confirm the existence of an instability as reported in previous theories, experiments, and numerical simulations. Using data generated from particle image velocimetry measurements, we quantify the sedimentation structures over a wide range of parameters, which include the height of fluid, cross-section of the sedimentation cell, fibre dimensions, fluid properties, and volume fractions ranging from dilute to semi-dilute. Alternating structures of streamers and backflow regions which span the height of the sedimentation cell form at short times and transition from large wavelengths to smaller wavelength as the sedimentation proceeds. No simple dependence of the horizontal wavelength on the length scales and concentration was observed in the experiments, suggesting the need for additional analysis. We also report the mean velocities and velocity fluctuations; the strength of the velocity fluctuations strongly correlates with the size of the vertical component of the sedimentation structure. Measurements of the orientation distribution, using an efficient and newly employed technique, agree with previously published results. A movie is available with the online version of the paper.

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