Double parton interactions as a background to associated HW production at the Tevatron

In this paper we study events with W+jets final state, produced in double parton (DP) interactions, as a background to the associated Higgs boson (H) and W production, with H->bbar decay, at the Tevatron. We have found that the event yield from the DP background can be quite sizable, which necessitates a choice of selection criteria to separate the HW and DP production processes. We suggest a set of variables sensitive to the kinematics of DP and HW events. We show that these variables, being used as an input to the artificial neural network, allow one to significantly improve a sensitivity to the Higgs boson production.Comment: 13 pages, 11 figure

Physics of double parton interactions: Recent results from DØ experiment

A study of processes with double parton interactions (DPI) in pp̄ collisions collected by DØ detector at the Tevatron collider at √s = 1.96 TeV is presented. The study includes measurements of DPI event fraction and the effective cross section, a process-independent parameter related to the effective interaction region inside a hadron. The measurements are done using processes with photon and hadronic jets in different parton-parton scatterings: photon+jet + dijet, photon+b/c + dijet and diphoton + dijet. The measured effective cross section is applied in order to estimate background from DPI processes to WH production at the Tevatron energy

Study of multiple partonic interactions in DZERO

The third international workshop on multiple partonic interactions (MPI) took place at DESY in Hamburg from 21 to 25 November 2011. MPI are often crucial for interpreting results obtained at the Large Hadron Collider (LHC). The quest for a sound understanding of the dynamics behind MPI { particularly in the era of the LHC { has thus focused the aim of this workshop. It concentrated on phenomenology at previous hadron colliders and early LHC results, as well as theoretical considerations and the modeling of MPI in Monte Carlo event generators. The workshop forstered close contact between the experimental and theoretical communities. It provided a setting to discuss many of the dierent aspects of MPI, eventually identifying them as a unifying concept between apparently dierent lines of research and evaluating their impact on the LHC physics programme. In a total of 45 plenary talks, two round table discussions and a poster session, the workshop covered experimental results, Monte Carlo development and tuning, phenomenology and dedicated measurements of MPI, progress of theoretical understanding as well as the role of MPI in diraction and small-x physics. Connections to closely related research within the elds of heavy ion physics and cosmic rays have also been covered

PˉANDA\bar{P}ANDA Muon System Prototype

The $\bar{P}ANDA$ Experiment will be one of the key experiments at the Facility for Antiproton and Ion Research (FAIR) which is under construction now in the territory of the GSI Helmholtz Centre for Heavy Ion Research in Darmstadt, Germany. $\bar{P}ANDA$ is aimed to study hadron spectroscopy and various topics of the weak and strong forces. Muon System is chosen as the most suitable technology for detecting the muons. The Prototype of the $\bar{P}ANDA$ Muon System is installed on the test beam line T9 at the Proton Synchrotron (PS) at CERN. Status of the $\bar{P}ANDA$ Muon System prototype is presented with few preliminary results

PANDA Muon System Prototype

The PANDA Experiment will be one of the key experiments at the Facility for Antiproton and Ion Research (FAIR) which is under construction now in the territory of the GSI Helmholtz Centre for Heavy Ion Research in Darmstadt, Germany. PANDA is aimed to study hadron spectroscopy and various topics of the weak and strong forces. Muon System is chosen as the most suitable technology for detecting the muons. The Prototype of the PANDA Muon System is installed on the test beam line T9 at the Proton Synchrotron (PS) at CERN. Status of the PANDA Muon System prototype is presented with few preliminary results

Hyperon signatures in the PANDA experiment at FAIR

We present a detailed simulation study of the signatures from the sequential decays of the triple-strange pbar p -> Ω+Ω- -> K+ΛbarK- Λ -> K+pbarπ+K-pπ- process in the PANDA central tracking system with focus on hit patterns and precise time measurement. We present a systematic approach for studying physics channels at the detector level and develop input criteria for tracking algorithms and trigger lines. Finally, we study the beam momentum dependence on the reconstruction efficiency for the PANDA detector