Energy dependence of opaqueness for pp collisions at high energies

1978 ◽  
Vol 8 (5-6) ◽  
pp. 319-328 ◽  
Author(s):  
T. T. Chou
Keyword(s):  
Energy Dependence ◽  
Pp Collisions ◽  
High Energies

Fluctuations

2018 ◽  
Author(s):  
Richard Wigmans
Keyword(s):  
Energy Dependence ◽  
Energy Resolution ◽  
Practical Importance ◽  
Shower Particle ◽  
Formation Processes ◽  
Instrumental Effects ◽  
Important Type ◽  
High Energies ◽  
Different Types ◽  
Electromagnetic Component

The energy resolution, i.e. the precision with which the energy of a showering particle can be measured, is one of the most important characteristics of a calorimeter. This resolution is determined by fluctuations in the absorption and signal formation processes. In this chapter, the different types of fluctuations that may play a role are examined, and their relative practical importance is addressed. Sources of fluctuations include fluctuations in the number of signal quanta, sampling fluctuations, fluctuations in shower leakage, as well as a variety of instrumental effects. Since the energy dependence of the different types of fluctuations is not the same, different types of fluctuations may dominate the energy resolution at low and and at high energies. An important type of fluctuations is part of the non-compensation phenomena. It concerns fluctuations in the strength of the electromagnetic component of hadronic showers. The effects of these fluctuations, which typically dominate the energy resolution for hadron and jet detection, are examined in detail. In sampling calorimeters, one particular shower particle may sometimes have catastrophic effects on the calorimeter performance. Several examples of such cases are discussed.

Energy dependence of hadron yields in pp and AA collisions

2015 ◽  
Vol 39 ◽  
pp. 1560109
Author(s):  
D. A. Artemenkov ◽  
G. I. Lykasov ◽  
A. I. Malakhov
Keyword(s):  
Energy Dependence ◽  
Hadron Production ◽  
Exponential Form ◽  
Suggested Approach ◽  
High Energies ◽  
Aa Collisions

To describe the data on hadron production at high energies in the midarapidity region and not large transverse momenta [Formula: see text], we modify the simple exponential form of the [Formula: see text]-spectrum. The hadron [Formula: see text]-spectrum is presented in two parts due to the contributions of quarks and gluons, each of them has different energy dependence. The suggested approach alows us to describe rather satisfactorily the inclusive spectra of hadrons produced in [Formula: see text] collisions at energies from the AGS up to LHC.

scholarly journals Self-similarity of hadron production in pp and AA collisions at high energies

2015 ◽  
Vol 30 (21) ◽  
pp. 1550127 ◽  
Author(s):  
D. A. Artemenkov ◽  
G. I. Lykasov ◽  
A. I. Malakhov
Keyword(s):  
Hadron Production ◽  
The Self ◽  
Pp Collisions ◽  
Self Similarity ◽  
High Energies ◽  
Wide Range ◽  
Aa Collisions

We analyze the self-similarity approach applied to study the hadron production in pp and AA collisions. This approach allows us to describe rather well the ratio of the proton to antiproton yields in AA collisions as a function of the energy at a wide range from a few GeV to a few TeV. We suggest a modification of this approach to describe rather well the inclusive spectra of hadrons produced in pp collisions at different initial energies from the AGS to LHC.

scholarly journals ENERGY DEPENDENCE OF AVERAGE TRANSVERSE MOMENTUM IN HADRON PRODUCTION DUE TO COLLECTIVE EFFECTS

2010 ◽  
Vol 25 (16) ◽  
pp. 1315-1324 ◽  
Author(s):  
S. M. TROSHIN ◽  
N. E. TYURIN
Keyword(s):  
Transverse Momentum ◽  
Energy Dependence ◽  
Transient State ◽  
Hadron Production ◽  
Collective Effects ◽  
Pp Collisions ◽  
Average Transverse Momentum ◽  
Secondary Particles ◽  
Collective Rotation ◽  
State Of Matter

Motivated by the first measurements of the experiment CMS at the LHC at [Formula: see text] and 2.36 TeV, we discuss energy dependence of average transverse momentum of the secondary particles in hadron production in pp-collisions. We suggest a possible explanation of this dependence as a result of collective rotation of the transient state and associate its further possible decrease with flattening off at higher energies with transition to the genuine QGP state of matter.

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