Azimuthal correlations of high transverse momentum jets at next-to-leading order in the parton branching method
Published version
Peer-reviewed
Repository URI
Repository DOI
Change log
Authors
Abstract
jats:titleAbstract</jats:title>jats:pThe azimuthal correlation, jats:inline-formulajats:alternativesjats:tex-math$$\Delta \phi _{12}$$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> mml:mrow mml:miΔ</mml:mi> mml:msub mml:miϕ</mml:mi> mml:mn12</mml:mn> </mml:msub> </mml:mrow> </mml:math></jats:alternatives></jats:inline-formula>, of high transverse momentum jets in pp collisions at jats:inline-formulajats:alternativesjats:tex-math$$\sqrt{s}=13$$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> mml:mrow mml:msqrt mml:mis</mml:mi> </mml:msqrt> mml:mo=</mml:mo> mml:mn13</mml:mn> </mml:mrow> </mml:math></jats:alternatives></jats:inline-formula> TeV is studied by applying PB-TMD distributions to NLO calculations via MCatNLO together with the PB-TMD parton shower. A very good description of the cross section as a function of jats:inline-formulajats:alternativesjats:tex-math$$\Delta \phi _{12}$$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> mml:mrow mml:miΔ</mml:mi> mml:msub mml:miϕ</mml:mi> mml:mn12</mml:mn> </mml:msub> </mml:mrow> </mml:math></jats:alternatives></jats:inline-formula> is observed. In the back-to-back region of jats:inline-formulajats:alternativesjats:tex-math$${\Delta \phi _{12}}\rightarrow \pi $$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> mml:mrow mml:mrow mml:miΔ</mml:mi> mml:msub mml:miϕ</mml:mi> mml:mn12</mml:mn> </mml:msub> </mml:mrow> mml:mo→</mml:mo> mml:miπ</mml:mi> </mml:mrow> </mml:math></jats:alternatives></jats:inline-formula>, a very good agreement is observed with the PB-TMD Set 2 distributions while significant deviations are obtained with the PB-TMD Set 1 distributions. Set 1 uses the evolution scale while Set 2 uses transverse momentum as an argument in jats:inline-formulajats:alternativesjats:tex-math$$\alpha _\mathrm {s}$$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> mml:msub mml:miα</mml:mi> mml:mis</mml:mi> </mml:msub> </mml:math></jats:alternatives></jats:inline-formula>, and the above observation therefore confirms the importance of an appropriate soft-gluon coupling in angular ordered parton evolution. The total uncertainties of the predictions are dominated by the scale uncertainties of the matrix element, while the uncertainties coming from the PB-TMDs and the corresponding PB-TMD shower are very small. The jats:inline-formulajats:alternativesjats:tex-math$$\Delta \phi _{12}$$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> mml:mrow mml:miΔ</mml:mi> mml:msub mml:miϕ</mml:mi> mml:mn12</mml:mn> </mml:msub> </mml:mrow> </mml:math></jats:alternatives></jats:inline-formula> measurements are also compared with predictions using MCatNLO together jats:scPythia</jats:sc>8, illustrating the importance of details of the parton shower evolution.</jats:p>
Description
Keywords
Journal Title
Conference Name
Journal ISSN
1434-6052