Highlights from LHC experiments and future perspectives

P Campana

doi:10.1063/1.4938595

Abstract

The experiments at LHC are collecting a large amount of data in a kinematic of the (x, Q2) variables never accessed before. Boosted by LHC analyses, Quantum Chromodynamics (QCD) is experiencing an impressive progress in the last few years, and even brighter perspectives can be foreseen for the future data taking. A subset of the most recent results from the LHC experiments in the area of QCD (both perturbative and soft) are reviewed.

Highlights

The most impressive result of the analyses of LHC data collected in the 2011-12 Run 1 is represented by the observation [1] of a scalar particle at a mass of 125 GeV and its unambigous characterization as the messenger of the Brout-Englert-Higgs mechanism
The NNLO fit performs significantly better than the next-to-leading order (NLO) one in describing the low mass data
Several different tools are available for studying soft Quantum Chromodynamics (QCD) effects at LHC: the analysis of charged particle multiplicities and energy flow, the study of diffractive scattering and Central Exclusive Production, the observation of multi-parton interactions (MPI) and underlying event (UE), the measurement of total p-p cross-section, and many others

Summary

Introduction

The most impressive result of the analyses of LHC data collected in the 2011-12 Run 1 is represented by the observation [1] of a scalar particle at a mass of 125 GeV and its unambigous characterization as the messenger of the Brout-Englert-Higgs mechanism. PDFs are the dominant systematic for precision measurements like MW , that test the internal consistency of SM: half of the current uncertainty on MW is due to the knowledge of PDFs. They are essential to evaluate the sensitivity in the searches for new particles: as examples, SUSY particle production cross-sections depend strongly on these functions as well as the evaluation of shapes of invariant di-lepton or di-jet mass spectra.

Results

Conclusion