scholarly journals Running coupling and power corrections in non-linear evolution at the high-energy limit

2007 ◽  
Vol 784 (1-4) ◽  
pp. 282-340 ◽  
Author(s):  
Einan Gardi ◽  
Janne Kuokkanen ◽  
Kari Rummukainen ◽  
Heribert Weigert
Keyword(s):  
High Energy ◽  
Energy Limit ◽  
High Energy Limit ◽  
Linear Evolution ◽  
Power Corrections ◽  
Running Coupling ◽  
Non Linear

scholarly journals QGSJET-III model: physics and preliminary results

2019 ◽  
Vol 208 ◽  
pp. 11001 ◽  
Author(s):  
Sergey Ostapchenko
Keyword(s):  
High Energy ◽  
Previous Model ◽  
Energy Limit ◽  
High Energy Limit ◽  
New Model ◽  
Preliminary Results ◽  
Model Version ◽  
Power Corrections ◽  
Very High Energy ◽  
Very High

We discuss in some detail the physics content of the new model, QGSJET-III-01, focusing on major problems related to the treatment of semihard processes in the very high energy limit. A special attention has been payed to the main improvement, compared to the QGSJET-II model, which is related to a phenomenological treatment of leading power corrections corresponding to final parton rescattering off soft gluons. In particular, this allowed us to use a twice smaller separation scale between the soft and hard parton physics, compared to the previous model version, QGSJET-II-04. Preliminary results obtained with the new model are also presented.

HIGH ENERGY LIMIT IN QCD

2011 ◽  
Vol 26 (09) ◽  
pp. 603-623
Author(s):  
ANNA M. STASTO
Keyword(s):  
Inelastic Scattering ◽  
Deep Inelastic Scattering ◽  
Heavy Ion Collisions ◽  
Heavy Ion ◽  
High Energy ◽  
Energy Limit ◽  
High Energy Limit ◽  
Ion Collisions ◽  
Small X

We briefly review some selected topics in the small x physics. In particular, we discuss the progress in the problem related to the resummation at small x and the parton saturation phenomena. Finally we discuss some phenomenological applications to deep inelastic scattering, hadron and heavy ion collisions.

scholarly journals The β-ray spectrum of Ra E

1939 ◽  
Vol 170 (941) ◽  
pp. 190-205 ◽  
Keyword(s):  
Distribution Curve ◽  
High Energy ◽  
Energy Limit ◽  
Total Change ◽  
High Energy Limit ◽  
Nuclear Collisions ◽  
The Past ◽  
Low Energy Electrons ◽  
Energy Distribution Curve ◽  
Chamber Measurements

Interest in the continuous β-ray spectrum has been revived during the past few years by the discovery of induced β-ray activity and the difficulty which has been experienced in incorporating an account of the phenomenon in the theory of the nucleus. Attention has been focused on two features of the spectrum: the high-energy limit, the accurate measurement of which yields the total change in nuclear energy associated with the β disintegration, and the form of the energy distribution curve, which is discriminative in theories of the β-ray emission process. Owing to the convenience of R aE as a source, the β-ray spectrum of this element has received considerable attention, and a comprehensive table of previous work published in a recent paper by O’Conor (1937) shows that recent values of the high-energy limit obtained with magnetic spectrometers are in fair agreement. The form of the R aE spectrum, however, is still not known with any certainty. This can be made clear with the help of Table I, which sets out the results and significant experimental details of the work carried out since 1935 with magnetic spectrometers. Some recent work with cloud expansion chambers is not included because the results are rather discordant. With the relatively low energy electrons of R aE and the high probability of nuclear collisions in the chamber, measurements of the energies of the β-particles are extremely difficult, and the results are probably not as reliable as those obtained with magnetic spectrometers.

scholarly journals PROBING HIGH ENERGY PROPERTY OF STRING SCATTERING BY EFFECTIVE FIELD THEORY

2013 ◽  
Vol 21 ◽  
pp. 153-154
Author(s):  
CHUAN-TSUNG CHAN ◽  
SHOICH KAWAMOTO ◽  
DAN TOMINO
Keyword(s):  
Field Theory ◽  
Effective Field Theory ◽  
Open String ◽  
High Energy ◽  
Effective Field ◽  
Energy Limit ◽  
High Energy Limit ◽  
Linear Relations ◽  
Massive Spin ◽  
Symmetry Structure

It is known that infinitely many linear relations among string scattering amplitudes appear in high energy limit. These linear relations would imply a symmetry structure that is not manifest before taking the high energy limit. Motivated by this observation, we study an effective field theory of massive spin-2 and spin-1 particles, and try to understand what kind of structure reproduces the linear relations among the amplitudes of bosonic open string.

Sign in / Sign up

Export Citation Format

Share Document