Measurement of the Cross Section for Open-Beauty Production(14)
时间：2025-02-25
The cross section for open-beauty production in photon-photon collisions is measured using the whole high-energy and high-luminosity data sample collected by the L3 detector at LEP. This corresponds to 627/pb of integrated luminosity for electron-positron
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Figure4:Distributionofa)theleptonmomentum,c)itstransversemomentumande)thecosineofitspolarangleforeventscontainingelectronsandb),d)andf)foreventscontainingmuons.Thepointsarethedatawhilethedottedlinerepresentsthebackgroundfromthee+e →q¯q,e+e →τ+τ ,e+e →W+W ande+e →e+e τ+τ processes.Thedashedlinesarethesumofthisbackgroundandthelight-quarkcontribution,whilethesolidlinesalsoincludeb-quarkproduction.Thenormalisationfollowsfromthe tdiscussedinthetext.
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