218730825
Measurement of pseudorapidity distributions of charged particles in proton–proton collisions at √s = 8 TeV by the CMS and TOTEM experiments
208865876
Measurements of jet multiplicity and differential production cross sections of Z + jets events in proton-proton collisions at √s = 7 TeV
Measurements of differential cross sections are presented for the production of a Z boson and at least one hadronic jet in proton-proton collisions at √s=7  TeV, recorded by the CMS detector, using a data sample corresponding to an integrated luminosity of 4.9  fb^(−1). The jet multiplicity distribution is measured for up to six jets. The differential cross sections are measured as a function of jet transverse momentum and pseudorapidity for the four highest transverse momentum jets. The distribution of the scalar sum of jet transverse momenta is also measured as a function of the jet multiplicity. The measurements are compared with theoretical predictions at leading and next-to-leading order in perturbative QCD.
118458610
Electroweak Precision Tests: What Do We Learn?
The experimentation at the Z resonance at LEP makes it possible, for the first time, to study with great precision some properties of the electroweak interactions at distances of the order of the inverse Fermi scale, G F 1/2 . An immediate question arises: What is it that we learn from these studies? The answer is not an easy one. It may in fact require some time and some complementary studies (both experimental and theoretical) to be able to fully appreciate the significance of these precision tests of the electroweak interactions. What is sure is that a judgment of the impact of these tests requires an appreciation of several different aspects of the theory of the electroweak interactions themselves. In particular, this appreciation is not achieved, I believe, by only making a comparison of the Standard Model 1 (SM) predictions with the experimental results.
116144384
Beyond SU(3) x SU(2) x U(1)