Nicole Calace

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Search for direct top squark pair production in final states with two tau leptons in pp collisions at √ s = 8 TeV with the ATLAS detector Abstract A search for direct pair production of the super-symmetric partner of the top quark, decaying via a scalar tau to a nearly massless gravitino, has been performed using 20 fb −1 of proton–proton collision data at(More)
This paper reviews and extends searches for the direct pair production of the scalar supersymmetric partners of the top and bottom quarks in proton-proton collisions collected by the ATLAS collaboration during the LHC Run 1. Most of the analyses use 20 [Formula: see text] of collisions at a centre-of-mass energy of [Formula: see text] TeV, although in some(More)
Searches for pair-produced scalar leptoquarks are performed using 20 fb −1 of proton–proton collision data provided by the LHC and recorded by the ATLAS detector at √ s = 8 TeV. Events with two electrons (muons) and two or more jets in the final state are used to search for first (second)-generation leptoquarks. The results from two previously published(More)
This paper reports a detailed study of techniques for identifying boosted, hadronically decaying W bosons using 20.3 fb −1 of proton–proton collision data collected by the ATLAS detector at the LHC at a centre-of-mass energy √ s = 8 TeV. A range of techniques for optimising the signal jet mass resolution are combined with various jet sub-structure(More)
Measurements of fiducial cross-sections for t ¯ t production with one or two additional b-jets in pp collisions at √ s = 8 TeV using the ATLAS detector Abstract Fiducial cross-sections for t ¯ t production with one or two additional b-jets are reported, using an integrated luminosity of 20.3 fb −1 of proton–proton collisions at a centre-of-mass energy of 8(More)
Search for metastable heavy charged particles with large ionisation energy loss in pp collisions at √ s = 8 TeV using the ATLAS experiment Abstract Many extensions of the Standard Model predict the existence of charged heavy long-lived particles, such as R-hadrons or charginos. These particles, if produced at the Large Hadron Collider, should be moving(More)
The performance of the ATLAS muon trigger system is evaluated with proton–proton collision data collected in 2012 at the Large Hadron Collider at a centre-of-mass energy of 8 TeV. It is primarily evaluated using events containing a pair of muons from the decay of Z bosons. The efficiency of the single-muon trigger is measured for muons with transverse(More)
This paper presents cross sections for the production of a W boson in association with jets, measured in proton–proton collisions at √ s = 7 TeV with the ATLAS experiment at the large hadron collider. With an integrated luminosity of 4.6 fb −1 , this data set allows for an exploration of a large kinematic range, including jet production up to a transverse(More)
Millions of individuals have goals but struggle to achieve them. Research shows that writing down goals, sharing them with friends, and receiving feedback can increase the likelihood that these goals are achieved. However, there is limited research on technologies that support groups of friends working together toward goals. We are designing Pact, a social(More)
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