We present first measurements of charged and neutral particle-flow correlations in pp collisions using the ATLAS calorimeters. Data were collected in 2009 and 2010 at centre-of-mass energies of 900 GeV and 7 TeV. Events were selected using a minimum-bias trigger which required a charged particle in scintillation counters on either side of the interaction point. Particle flows, sensitive to the under- lying event, are measured using clusters of energy in the ATLAS calorimeters, taking advantage of their fine granu- larity. No Monte Carlo generator used in this analysis can accurately describe the measurements. The results are inde- pendent of those based on charged particles measured by the ATLAS tracking systems and can be used to constrain the parameters of Monte Carlo generators.

Measurements of underlying-event properties using neutral and charged particles in pp collisions at $\sqrt{s}=900$ GeV and $\sqrt{s}=7$ TeV with the ATLAS detector at the LHC

CACCIA, MASSIMO;
2011-01-01

Abstract

We present first measurements of charged and neutral particle-flow correlations in pp collisions using the ATLAS calorimeters. Data were collected in 2009 and 2010 at centre-of-mass energies of 900 GeV and 7 TeV. Events were selected using a minimum-bias trigger which required a charged particle in scintillation counters on either side of the interaction point. Particle flows, sensitive to the under- lying event, are measured using clusters of energy in the ATLAS calorimeters, taking advantage of their fine granu- larity. No Monte Carlo generator used in this analysis can accurately describe the measurements. The results are inde- pendent of those based on charged particles measured by the ATLAS tracking systems and can be used to constrain the parameters of Monte Carlo generators.
2011
G., Aad; B., Abbott; J., Abdallah; A. A., Abdelalim; A., Abdesselam; O., Abdinov; B., Abi; M., Abolins; H., Abramowicz; H., Abreu; E., Acerbi; B. S., ...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11383/1804124
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