Measurement of jet fragmentation properties at the CERN Collider

Measurement of the strong coupling constant from inclusive jet production at the Tevatron pp collider.

We report a measurement of the strong coupling constant, alpha(s)(MZ), extracted from inclusive jet production in pp collisions at square root[s] = 1800 GeV. The QCD prediction for the evolution of alpha(s) with jet transverse energy ET is tested over the range 40<ET<450 GeV using ET for the renormalization scale. The data show good agreement with QCD in the region below 250 GeV. The value of a...

Elastic Scattering at Cern Collider Energy and the Geometrical Picture

Recent UA1 and UA4 experimental results for ~p collisions at 540 GeV center of mass energy are analyzed in the geometrical picture. Recent experiments [1 ] at the ~p collider by the o.s5 UA1 and UA4 detectors have revealed interesting features of elastic Op scattering at a center of mass energy of 540 GeV. We wish to discuss these features from the viewpoint of the geometrical picture [2] of hi...

Tagging two-photon production at the CERN Large Hadron Collider

Tagging two-photon interactions offers a significant extension of the CERN LHC physics program. The effective luminosity of high-energy gg collisions reaches 1% of the proton-proton luminosity. The standard detector techniques used for measuring very forward proton scattering will allow a reliable separation of interesting two-photon interactions. Particularly exciting is the possibility of det...

Excited Leptons at the CERN Large Hadron Collider

We analyze the potential of the CERN Large Hadron Collider (LHC) to search for excited spin-12 electrons and neutrinos. Assuming a SU(2)L⊗U(1)Y invariant model, we study in detail the single production of excited electrons and neutrinos and respective backgrounds through the reactions pp → e+e−V and e±νV with V = γ, W , or Z. We show that the LHC will be able to tighten considerably the direct ...

Measurement of the Inclusive Jet Cross Section at the Fermilab Tevatron pp̄ Collider Using a Cone-Based Jet Algorithm