Measurement of the Centrality Dependence of the Dijet Yield in p+Pb Collisions at √sNN=8.16  TeV with the ATLAS Detector

For complete list of authors see http://dx.doi.org/10.1103/PhysRevLett.132.102301
ATLAS measured the centrality dependence of the dijet yield using 165 nb−1 of p+Pb data collected at √sNN=8.16 TeV in 2016. The event centrality, which reflects the p+Pb impact parameter, is characterized by the total transverse energy registered in the Pb-going side of the forward calorimeter. The central-to-peripheral ratio of the scaled dijet yields, RCP, is evaluated, and the results are presented as a function of variables that reflect the kinematics of the initial hard parton scattering process. The RCP shows a scaling with the Bjorken x of the parton originating from the proton, xp, while no such trend is observed as a function of xPb. This analysis provides unique input to understanding the role of small proton spatial configurations in p+Pb collisions by covering parton momentum fractions from the valence region down to xp∼10−3 and xPb∼4×10−4.

Bergeås Kuutmann, Elin,1980-Uppsala universitet,Högenergifysik(Swepub:uu)elibe340 (author)
Brenner, RichardUppsala universitet,Högenergifysik(Swepub:uu)richbren (author)
Dimitriadi, ChristinaUppsala universitet,Högenergifysik,Univ Bonn, Phys Inst, Bonn, Germany(Swepub:uu)chrdi726 (author)
Ekelöf, TordUppsala universitet,FREIA(Swepub:uu)tordeke (author)
Ellajosyula, VenugopalUppsala universitet,Högenergifysik(Swepub:uu)venel845 (author)
Ellert, MattiasUppsala universitet,Högenergifysik(Swepub:uu)mel03009 (author)
Ferrari, Arnaud,1973-Uppsala universitet,Högenergifysik(Swepub:uu)arfer499 (author)
Gonzalez Suarez, RebecaUppsala universitet,Högenergifysik(Swepub:uu)rebgo209 (author)
Mathisen, ThomasUppsala universitet,Högenergifysik(Swepub:uu)thoma814 (author)
Mullier, Geoffrey A.Uppsala universitet,Högenergifysik(Swepub:uu)geomu177 (author)
Ripellino, GiuliaUppsala universitet,Högenergifysik(Swepub:uu)giuri909 (author)
Steentoft, JonasUppsala universitet,Högenergifysik(Swepub:uu)jonst734 (author)
Sunneborn Gudnadottir, OlgaUppsala universitet,Högenergifysik(Swepub:uu)olggu198 (author)
Zwalinski, L.CERN, Geneva, Switzerland (author)
Aix Marseille Univ, CNRS, IN2P3, CPPM, Marseille, FranceHögenergifysik (creator_code:org_t)

By the author/editor: Aad, G.; Bergeås Kuutmann ...; Brenner, Richard; Dimitriadi, Chri ...; Ekelöf, Tord; Ellajosyula, Ven ...; show more...; Ellert, Mattias; Ferrari, Arnaud, ...; Gonzalez Suarez, ...; Mathisen, Thomas; Mullier, Geoffre ...; Ripellino, Giuli ...; Steentoft, Jonas; Sunneborn Gudnad ...; Zwalinski, L.; show less...

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NATURAL SCIENCES: NATURAL SCIENCES; and Physical Science ...; and Subatomic Physic ...

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