Upload resources

Upload your works to SEDICI to increase its visibility and improve its impact

 

Double-tag events in two-photon collisions at LEP

Document type: Articulo

Abstract

Double-tag events in two-photon collisions are studied using the L3 detector at LEP centre-of-mass energies from √s = 189 GeV to 209 GeV. The cross sections of the e+e− → e+e−hadrons and γ ∗γ ∗ → hadrons processes are measured as a function of the product of the photon virtualities, Q2 = Q2 1Q2 2, of the two-photon mass, Wγ γ , and of the variable Y = ln(W2 γ γ /Q2). The average photon virtuality is Q2 1=Q2 2 = 16 GeV2. The results are in agreement with next-to-leading order calculations for the process γ ∗γ ∗ → qq in the interval 2 ̄ Y 5. An excess is observed in the interval 5 < Y 7, corresponding to Wγ γ greater than 40 GeV. This may be interpreted as a contribution of resolved photon QCD processes or the onset of BFKL phenomena.

General information

Issue date: 7 de febrero de 2002
Document language: English
Journal: Physics Letters B; vol. 531, no. 1-2
Origin: Facultad de Ciencias Exactas
ISSN: 0370-2693
Pages: 39-51
xmlui.dri2xhtml.METS-1.0.item-dc-subject: Double-tag events ; Física ; two-photon collisions ; LEP
Subjects: Ciencias Exactas

Download Files

Thumbnail
Documento completo
Download file (355.1Kb) - PDF
 
Created: 13 de junio de 2019
Available since: 13 de junio de 2019
Please, use one of this identificators(URI) for cite o linking this item:
  • http://sedici.unlp.edu.ar/handle/10915/76432
  • https://doi.org/10.1016/S0370-2693(02)01340-0

    • This item appears in the following Collection(s)

    Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) Except where otherwise noted, this item's license is described as Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)