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" Azimuthal separation in nearly back-to-back jet topologies in inclusive 2- and 3-jet events in pp collisions at s=13Te. "
Sirunyan, AMTumasyan, AAdam, WAmbrogi, FAsilar, EBergauer, TBrandstetter, JBrondolin, EDragicevic, MErö, JDel Valle, A EscalanteFlechl, MFrühwirth, RGhete, VMHrubec, JJeitler, MKrammer, NKrätschmer, ILiko, DMadlener, TMikulec, IRad, NRohringer, HSchieck, JSchöfbeck, Ret al.
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AL
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| Record Number
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901413
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LA5478n4r1
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| Title & Author
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Azimuthal separation in nearly back-to-back jet topologies in inclusive 2- and 3-jet events in pp collisions at s=13Te. [Article]\ Sirunyan, AMTumasyan, AAdam, WAmbrogi, FAsilar, EBergauer, TBrandstetter, JBrondolin, EDragicevic, MErö, JDel Valle, A EscalanteFlechl, MFrühwirth, RGhete, VMHrubec, JJeitler, MKrammer, NKrätschmer, ILiko, DMadlener, TMikulec, IRad, NRohringer, HSchieck, JSchöfbeck, Ret al.
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2019
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Lawrence Berkeley National Laboratory
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| Abstract
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A measurement for inclusive 2- and 3-jet events of the azimuthal correlation between the two jets with the largest transverse momenta, Δϕ12 , is presented. The measurement considers events where the two leading jets are nearly collinear ("back-to-back") in the transverse plane and is performed for several ranges of the leading jet transverse momentum. Proton-proton collision data collected with the CMS experiment at a center-of-mass energy of 13Te and corresponding to an integrated luminosity of 35.9fb-1 are used. Predictions based on calculations using matrix elements at leading-order and next-to-leading-order accuracy in perturbative quantum chromodynamics supplemented with leading-log parton showers and hadronization are generally in agreement with the measurements. Discrepancies between the measurement and theoretical predictions are as large as 15%, mainly in the region 177∘<Δϕ12<180∘ . The 2- and 3-jet measurements are not simultaneously described by any of models.
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