RuPAC 2006 - List of Authors

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Kotkin, G.L.

Paper	Title	Page
WEJO04	Beam-size Effect And Particle Losses At Colliders G.L.Kotkin, V.G.Serbo Novosibirsk State University, Novosibirsk, Russia In the modern colliders, the macroscopically large impact parameters give a substantial contribution to the standard cross section of the e⁺e^-? e⁺e^-γ process. These impact parameters may be much larger than the transverse sizes of the colliding bunches. It means that the standard cross section of this process has to be substantially modified. Such a beam-size effect has been discovered in BINP (Novosibirsk) twenty years ago. In this report we give simple qualitative description of this effect and present two novel topics. First, we present our calculations related to bremsstrahlung at B-factories KEKB and PEP-II. We find out that this effect reduces beam losses by about 20%. Second, we derive formulas which necessary to take into account quantitatively the effect of particle correlations in the beams on the spectrum of bremsstrahlung as well as in pair production. This report is based on the papers: G.L. Kotkin and V.G. Serbo, NIM B227 (2005) 137 and Phys. Rev. STAB 7 (2004) 101001.	109

Paper

Title

Page

Beam-size Effect And Particle Losses At Colliders

G.L.Kotkin, V.G.Serbo
Novosibirsk State University, Novosibirsk, Russia

In the modern colliders, the macroscopically large impact parameters give a substantial contribution to the standard cross section of the e⁺e^-? e⁺e^-γ process. These impact parameters may be much larger than the transverse sizes of the colliding bunches. It means that the standard cross section of this process has to be substantially modified. Such a beam-size effect has been discovered in BINP (Novosibirsk) twenty years ago. In this report we give simple qualitative description of this effect and present two novel topics. First, we present our calculations related to bremsstrahlung at B-factories KEKB and PEP-II. We find out that this effect reduces beam losses by about 20%. Second, we derive formulas which necessary to take into account quantitatively the effect of particle correlations in the beams on the spectrum of bremsstrahlung as well as in pair production. This report is based on the papers: G.L. Kotkin and V.G. Serbo, NIM B227 (2005) 137 and Phys. Rev. STAB 7 (2004) 101001.

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