scholarly journals Effect of gluon condensate on light quark energy loss

2019 ◽  
Vol 79 (12) ◽  
Author(s):  
Zi-qiang Zhang
Keyword(s):  
High Temperature ◽  
Energy Loss ◽  
Drag Force ◽  
Light Quark ◽  
Gluon Condensate ◽  
Jet Quenching ◽  
Quark Energy Loss

AbstractApplying the AdS/CFT correspondence, we study the jet quenching of light quarks traversing in a deformed AdS background with backreaction due to the gluon condensate. We perform the analysis using the falling string and shooting string cases, respectively. It is found that the two methods lead to a unanimous conclusion: the inclusion of the gluon condensate enhances the energy loss. In particular, the energy loss decreases as the value of the gluon condensate decreases in the deconfined phase, and at high temperature, it is nearly not modified by the gluon condensate, in agreement with the findings of the jet quenching parameter and drag force.

scholarly journals Effect of back reaction on light quark energy loss in heavy quark cloud

2020 ◽  
Vol 80 (10) ◽  
Author(s):  
Zi-qiang Zhang ◽  
De-fu Hou
Keyword(s):  
Energy Loss ◽  
Heavy Quark ◽  
Drag Force ◽  
Light Quark ◽  
Heavy Quarks ◽  
Jet Quenching ◽  
Back Reaction ◽  
Strongly Coupled ◽  
Yang Mills ◽  
Quark Energy Loss

AbstractWe study the effect of back reaction on the energy loss of light quarks in strongly coupled $${\mathcal {N}}=4$$ N = 4 supersymmetric Yang–Mills (SYM) plasma, by using the AdS/CFT correspondence. We perform the analysis within falling string and shooting string approaches, respectively. It is shown that the back reaction, arising from the presence of static heavy quarks uniformly distributed over SYM, enhances the energy loss, in agreement with the findings of the drag force and jet quenching parameter.

scholarly journals HEAVY QUARK ENERGY LOSS THROUGH SOFT QCD SCATTERING IN THE QGP

2007 ◽  
Vol 16 (07n08) ◽  
pp. 2072-2078 ◽  
Author(s):  
KORINNA ZAPP ◽  
GUNNAR INGELMAN ◽  
JOHAN RATHSMAN ◽  
JOHANNA STACHEL
Keyword(s):  
Energy Loss ◽  
Heavy Quark ◽  
Jet Quenching ◽  
Gluon Radiation ◽  
Strong Suppression ◽  
Charm Quarks ◽  
Collisional Energy Loss ◽  
Collisional Energy ◽  
Model Based ◽  
Quark Energy Loss

A strong suppression of non-photonic electrons in Au + Au collisions is observed at Rhic. This is in disagreement with the expected dominance of the energy loss via gluon radiation, which predicts a much weaker suppression of heavy flavours due to the dead cone effect. However, collisional energy loss is also important, as demonstrated recently by the Soft Colour Interaction Jet Quenching model. Based on this model we show that collisional energy loss of charm quarks gives a suppression of electrons of the observed magnitude, but the contribution from beauty decays, which dominates at intermediate and large p⊥, results in a somewhat weaker overall suppression of electrons than observed.

scholarly journals Light quark energy loss in strongly coupledN=4supersymmetric Yang-Mills plasma

2009 ◽  
Vol 79 (12) ◽  
Author(s):  
Paul M. Chesler ◽  
Kristan Jensen ◽  
Andreas Karch ◽  
Laurence G. Yaffe
Keyword(s):  
Energy Loss ◽  
Light Quark ◽  
Yang Mills ◽  
Quark Energy Loss

Electron energy loss near edge structures of intermetallic alloys and grain boundaries in NiAl

1996 ◽  
Vol 54 ◽  
pp. 522-523
Author(s):  
G.A. Botton ◽  
C.J. Humphreys
Keyword(s):  
High Temperature ◽  
Transition Metal ◽  
Energy Loss ◽  
Grain Boundaries ◽  
Industrial Applications ◽  
Edge Structure ◽  
Structural Applications ◽  
Yield Behaviour ◽  
Late Transition ◽  
Metal Aluminides

Transition metal aluminides are of great potential interest for high temperature structural applications. Although these materials exhibit good mechanical properties at high temperature, their use in industrial applications is often limited by their intrinsic room temperature brittleness. Whilst this particular yield behaviour is directly related to the defect structure, the properties of the defects (in particular the mobility of dislocations and the slip system on which these dislocations move) are ultimately determined by the electronic structure and bonding in these materials. The lack of ductility has been attributed, at least in part, to the mixed bonding character (metallic and covalent) as inferred from ab-initio calculations. In this work, we analyse energy loss spectra and discuss the features of the near edge structure in terms of the relevant electronic states in order to compare the predictions on bonding directly with spectroscopic experiments. In this process, we compare spectra of late transition metal (TM) to early TM aluminides (FeAl and TiAl) to assess whether differences in bonding can also be detected. This information is then discussed in terms of bonding changes at grain boundaries in NiAl.

Electron energy-loss studies on high-temperature superconductors

1989 ◽  
Vol 162-164 ◽  
pp. 1415-1418 ◽  
Author(s):  
J. Fink ◽  
N. Nücker ◽  
H. Romberg ◽  
M. Alexander ◽  
S. Nakai ◽  
...  
Keyword(s):  
High Temperature ◽  
Energy Loss ◽  
Electron Energy ◽  
High Temperature Superconductors ◽  
Electron Energy Loss

scholarly journals Jet Quenching Beyond the Energy Loss Approach

2015 ◽  
Vol 37 ◽  
pp. 1560060
Author(s):  
Grigory Ovanesyan
Keyword(s):  
Energy Loss ◽  
Evolution Equations ◽  
Heavy Ion ◽  
Jet Quenching ◽  
Effective Theory ◽  
Dglap Evolution ◽  
Quenching Effect ◽  
Nuclear Modification Factor ◽  
Ion Collisions ◽  
Modification Factor

We study the jet quenching effect in heavy ion collisions, based on medium-induced splitting functions calculated from Soft Collinear Effective Theory with Glauber Gluons. Our method is formulated in the language of DGLAP evolution equations with medium-induced splitting functions. In the small-x soft gluon approximation we analytically solve the evolution equations and find an intuitive connection to the energy loss approach. For central Pb+Pb collisions at the LHC we quantify the effect of finite-x corrections for the nuclear modification factor and compare to data.

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