Sökning: onr:"swepub:oai:DiVA.org:kth-84575" >
Jet energy measurem...
Jet energy measurement with the ATLAS detector in proton- proton collisions at sqrt(s) = 7 TeV
-
Aad, Georges (författare)
-
- Strandberg, Jonas (författare)
- KTH,Partikel- och astropartikelfysik
-
- Lund-Jensen, Bengt (författare)
- KTH,Partikel- och astropartikelfysik
-
visa fler...
-
- Lafaye, Remi (författare)
- KTH,Partikel- och astropartikelfysik
-
et, al. (författare)
-
visa färre...
-
(creator_code:org_t)
- 2011
- 2011
- Engelska.
- Relaterad länk:
-
http://fr.arxiv.org/...
-
visa fler...
-
https://urn.kb.se/re...
-
visa färre...
Abstract
Ämnesord
Stäng
- The jet energy scale (JES) and its systematic uncertainty are determined for jets measured with the ATLAS detector at the LHC in proton-proton collision data at a centre-of-mass energy of sqrt(s) = 7 TeV corresponding to an integrated luminosity of 38 inverse pb. Jets are reconstructed with the anti-kt algorithm with distance parameters R=0.4 or R=0.6. Jet energy and angle corrections are determined from Monte Carlo simulations to calibrate jets with transverse momenta pt > 20 GeV and pseudorapidities eta<4.5. The JES systematic uncertainty is estimated using the single isolated hadron response measured in situ and in test-beams. The JES uncertainty is less than 2.5% in the central calorimeter region (eta<0.8) for jets with 60 < pt < 800 GeV, and is maximally 14% for pt < 30 GeV in the most forward region 3.2 50 GeV after a dedicated correction for this effect. The JES is validated for jet transverse momenta up to 1 TeV to the level of a few percent using several in situ techniques by comparing a well-known reference such as the recoiling photon pt, the sum of the transverse momenta of tracks associated to the jet, or a system of low-pt jets recoiling against a high-pt jet. More sophisticated jet calibration schemes are presented based on calorimeter cell energy density weighting or hadronic properties of jets, providing an improved jet energy resolution and a reduced flavour dependence of the jet response. The JES systematic uncertainty determined from a combination of in situ techniques are consistent with the one derived from single hadron response measurements over a wide kinematic range. The nominal corrections and uncertainties are derived for isolated jets in an inclusive sample of high-pt jets.
Ämnesord
- NATURVETENSKAP -- Fysik -- Subatomär fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Subatomic Physics (hsv//eng)
Publikations- och innehållstyp
- vet (ämneskategori)
- art (ämneskategori)
Hitta via bibliotek
Till lärosätets databas