LHC searches for missing transverse energy in association with a jet allow to place strong bounds on the interactions between dark matter and quarks. In this article, we present an extension of the POWHEG BOX capable of calculating the underlying cross sections at the next-to-leading order level. This approach enables us to consistently include the effects of parton showering and to apply realistic experimental cuts. We find significant differences from a fixed-order analysis that neglects parton showering effects. In particular, next-to-leading order corrections do not lead to a significant enhancement of the mono-jet cross section once a veto on additional jets is imposed. Nevertheless, these corrections reduce the theoretical uncertainties of the signal prediction and therefore improve the reliability of the derived bounds. We present our results in terms of simple rescaling factors, which can be directly applied to existing experimental analyses and discuss the impact of changing experimental cuts. © SISSA 2013.

Haisch, U., Kahlhoefer, F., Re, E. (2013). QCD effects in mono-jet searches for dark matter. JOURNAL OF HIGH ENERGY PHYSICS, 2013(12) [10.1007/JHEP12(2013)007].

QCD effects in mono-jet searches for dark matter

RE E
2013

Abstract

LHC searches for missing transverse energy in association with a jet allow to place strong bounds on the interactions between dark matter and quarks. In this article, we present an extension of the POWHEG BOX capable of calculating the underlying cross sections at the next-to-leading order level. This approach enables us to consistently include the effects of parton showering and to apply realistic experimental cuts. We find significant differences from a fixed-order analysis that neglects parton showering effects. In particular, next-to-leading order corrections do not lead to a significant enhancement of the mono-jet cross section once a veto on additional jets is imposed. Nevertheless, these corrections reduce the theoretical uncertainties of the signal prediction and therefore improve the reliability of the derived bounds. We present our results in terms of simple rescaling factors, which can be directly applied to existing experimental analyses and discuss the impact of changing experimental cuts. © SISSA 2013.
Articolo in rivista - Articolo scientifico
NLO computations; Phenomenological models;
English
Green Open Access
Haisch, U., Kahlhoefer, F., Re, E. (2013). QCD effects in mono-jet searches for dark matter. JOURNAL OF HIGH ENERGY PHYSICS, 2013(12) [10.1007/JHEP12(2013)007].
File in questo prodotto:
File Dimensione Formato  
Haisch2013_Article_QCDEffectsInMono-jetSearchesFo.pdf

Solo gestori archivio

Dimensione 2.11 MB
Formato Adobe PDF
2.11 MB Adobe PDF   Visualizza/Apri   Richiedi una copia

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/333985
Citazioni
  • Scopus 53
  • ???jsp.display-item.citation.isi??? 48
Social impact