Abstract
We extend our recent analysis of the limitations of the effective field theory approach to studying dark matter at the LHC, by investigating the case in which Dirac dark matter couples to standard model quarks via t-channel exchange of a heavy scalar mediator. We provide analytical results for the validity of the effective field theory description, for both √s = 8 TeV and 14 TeV. We make use of a MonteCarlo event generator to assess the validity of our analytical conclusions. We also point out the general trend that in the regions where the effective field theory is valid, the dark matter relic abundance is typically large.
Highlights
We extend our recent analysis of the limitations of the effective field theory approach to studying dark matter at the LHC, by investigating the case in which Dirac dark matter couples to standard model quarks via t-channel exchange of a heavy scalar mediator
We for the validity of the effective field theory make use of a MonteCarlo event generator description, for both to assess the validity of our analytical conclusions
We point out the general trend that in the regions where the effective field theory is valid, the dark matter relic abundance is typically large
Summary
We extend our recent analysis of the limitations of the effective field theory approach to studying dark matter at the LHC, by investigating the case in which Dirac dark matter couples to standard model quarks via t-channel exchange of a heavy scalar mediator. We provide analytical results for the validity of the effective field theory description, for both √s = 8 TeV and 14 TeV. We make use of a MonteCarlo event generator to assess the validity of our analytical conclusions. We for the validity of the effective field theory make use of a MonteCarlo event generator description, for both to assess the validity of our analytical conclusions. We point out the general trend that in the regions where the effective field theory is valid, the dark matter relic abundance is typically large. Since the initial motivation of using EFTs is to place model independent constraints on the dark sector independent of assumptions about the input parameters, it is becoming clear that extreme caution must be used when placing constraints on DM using EFTs at the LHC
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