scholarly journals Charge effect and finite ’t Hooft coupling correction on drag force and jet quenching parameter

2010 ◽  
Vol 68 (3-4) ◽  
pp. 505-511 ◽  
Author(s):  
Kazem Bitaghsir Fadafan
Keyword(s):  
Drag Force ◽  
Jet Quenching ◽  
Charge Effect ◽  
Hooft Coupling

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 Application of AdS/CFT in Quark-Gluon Plasma

2013 ◽  
Vol 2013 ◽  
pp. 1-13 ◽  
Author(s):  
J. Sadeghi ◽  
B. Pourhassan ◽  
S. Heshmatian
Keyword(s):  
Drag Force ◽  
Quark Gluon Plasma ◽  
Gluon Plasma ◽  
Jet Quenching ◽  
Screening Length ◽  
Insight Into

We review some important applications of AdS/CFT correspondence to gain insight into properties of the quark-gluon plasma. We study some important quantities such as drag force, screening length, and jet-quenching parameter of an external probe quark and also quark-antiquark configuration. In particular, we focus on the STU background and compare our results with other important backgrounds.

scholarly journals Drag force, jet quenching, and an AdS/QCD model

2007 ◽  
Vol 75 (8) ◽  
Author(s):  
Eiji Nakano ◽  
Shunsuke Teraguchi ◽  
Wen-Yu Wen
Keyword(s):  
Drag Force ◽  
Jet Quenching

scholarly journals Jet quenching at finite `t Hooft coupling and chemical potential from AdS/CFT

2006 ◽  
Vol 2006 (09) ◽  
pp. 039-039 ◽  
Author(s):  
Néstor Armesto ◽  
José Daniel Edelstein ◽  
Javier Mas
Keyword(s):  
Chemical Potential ◽  
Jet Quenching ◽  
Hooft Coupling

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 Nonperturbative study of the jet quenching parameter from AdS/CFT

2014 ◽  
Vol 29 ◽  
pp. 1460253
Author(s):  
De-Fu Hou ◽  
Zi-Qiang Zhang ◽  
Hai-Cang Ren
Keyword(s):  
Sigma Model ◽  
Theoretical Calculations ◽  
Strong Coupling Expansion ◽  
Jet Quenching ◽  
Nonzero Temperature ◽  
World Sheet ◽  
Yang Mills ◽  
Hooft Coupling ◽  
Classical World ◽  
Leading Term

This talk presents our derivation of the jet quenching parameter of 𝒩 = 4 super symmetric Yang-Mills theory to the sub-leading term in the large 't Hooft coupling λ at a nonzero temperature by including the world-sheet fluctuations around the classical world sheet from AdS /CFT. The strong coupling expansion corresponds to the semi-classical expansion of the string-sigma model, the gravity dual of the Wilson loop operator, with the sub-leading term expressed in terms of functional determinants of fluctuations. The contribution of these determinants are evaluated numerically. We find the jet quenching parameter is reduced due to world sheet fluctuations by a factor (1 - 1.97λ-1/2). Some insights have been discussed by the comparison between experimental data and our result and other theoretical calculations.

New type electron gun with electrostatic and electromagnetic lenses

1978 ◽  
Vol 36 (1) ◽  
pp. 62-63
Author(s):  
T. Ichinokawa ◽  
H. Maeda
Keyword(s):  
Electron Microscopy ◽  
Electron Beam ◽  
Optimum Condition ◽  
Bias Voltage ◽  
Electron Gun ◽  
Charge Effect ◽  
Micro Fabrication ◽  
Maximum Brightness ◽  
New Type ◽  
The Ideal

I. IntroductionThermionic electron gun with the Wehnelt grid is popularly used in the electron microscopy and electron beam micro-fabrication. It is well known that this gun could get the ideal brightness caluculated from the Lengumier and Richardson equations under the optimum condition. However, the design and ajustment to the optimum condition is not so easy. The gun has following properties with respect to the Wehnelt bias; (1) The maximum brightness is got only in the optimum bias. (2) In the larger bias than the optimum, the brightness decreases with increasing the bias voltage on account of the space charge effect. (3) In the smaller bias than the optimum, the brightness decreases with bias voltage on account of spreading of the cross over spot due to the aberrations of the electrostatic immersion lens.In the present experiment, a new type electron gun with the electrostatic and electromagnetic lens is designed, and its properties are examined experimentally.

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