Measurement of jet production cross sections in deep-inelastic ep scattering at HERA



Andreev, V, Baghdasaryan, A, Begzsuren, K, Belousov, A, Bolz, A, Boudry, V, Brandt, G, Brisson, V, Britzger, D, Buniatyan, A
et al (show 129 more authors) (2017) Measurement of jet production cross sections in deep-inelastic ep scattering at HERA. The European Physical Journal C, 77 (4).

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Abstract

<jats:title>Abstract</jats:title><jats:p>A precision measurement of jet cross sections in neutral current deep-inelastic scattering for photon virtualities <jats:inline-formula><jats:alternatives><jats:tex-math>$$5.5&lt;Q^2 &lt;80\,\mathrm {GeV}^2 $$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mn>5.5</mml:mn> <mml:mo>&lt;</mml:mo> <mml:msup> <mml:mi>Q</mml:mi> <mml:mn>2</mml:mn> </mml:msup> <mml:mo>&lt;</mml:mo> <mml:mn>80</mml:mn> <mml:mspace /> <mml:msup> <mml:mrow> <mml:mi>GeV</mml:mi> </mml:mrow> <mml:mn>2</mml:mn> </mml:msup> </mml:mrow> </mml:math></jats:alternatives></jats:inline-formula> and inelasticities <jats:inline-formula><jats:alternatives><jats:tex-math>$$0.2&lt;y&lt;0.6$$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mn>0.2</mml:mn> <mml:mo>&lt;</mml:mo> <mml:mi>y</mml:mi> <mml:mo>&lt;</mml:mo> <mml:mn>0.6</mml:mn> </mml:mrow> </mml:math></jats:alternatives></jats:inline-formula> is presented, using data taken with the H1 detector at HERA, corresponding to an integrated luminosity of <jats:inline-formula><jats:alternatives><jats:tex-math>$$290\,\mathrm {pb}^{-1}$$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mn>290</mml:mn> <mml:mspace /> <mml:msup> <mml:mrow> <mml:mi>pb</mml:mi> </mml:mrow> <mml:mrow> <mml:mo>-</mml:mo> <mml:mn>1</mml:mn> </mml:mrow> </mml:msup> </mml:mrow> </mml:math></jats:alternatives></jats:inline-formula>. Double-differential inclusive jet, dijet and trijet cross sections are measured simultaneously and are presented as a function of jet transverse momentum observables and as a function of <jats:inline-formula><jats:alternatives><jats:tex-math>$$Q^2$$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msup> <mml:mi>Q</mml:mi> <mml:mn>2</mml:mn> </mml:msup> </mml:math></jats:alternatives></jats:inline-formula>. Jet cross sections normalised to the inclusive neutral current DIS cross section in the respective <jats:inline-formula><jats:alternatives><jats:tex-math>$$Q^2$$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msup> <mml:mi>Q</mml:mi> <mml:mn>2</mml:mn> </mml:msup> </mml:math></jats:alternatives></jats:inline-formula>-interval are also determined. Previous results of inclusive jet cross sections in the range <jats:inline-formula><jats:alternatives><jats:tex-math>$$150&lt;Q^2 &lt;15{,}000\,\mathrm {GeV}^2 $$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mn>150</mml:mn> <mml:mo>&lt;</mml:mo> <mml:msup> <mml:mi>Q</mml:mi> <mml:mn>2</mml:mn> </mml:msup> <mml:mo>&lt;</mml:mo> <mml:mn>15</mml:mn> <mml:mo>,</mml:mo> <mml:mn>000</mml:mn> <mml:mspace /> <mml:msup> <mml:mrow> <mml:mi>GeV</mml:mi> </mml:mrow> <mml:mn>2</mml:mn> </mml:msup> </mml:mrow> </mml:math></jats:alternatives></jats:inline-formula> are extended to low transverse jet momenta <jats:inline-formula><jats:alternatives><jats:tex-math>$$5&lt;P_\mathrm{T}^\mathrm{jet} &lt;7\,\mathrm {GeV} $$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mn>5</mml:mn> <mml:mo>&lt;</mml:mo> <mml:msubsup> <mml:mi>P</mml:mi> <mml:mrow> <mml:mi>T</mml:mi> </mml:mrow> <mml:mi>jet</mml:mi> </mml:msubsup> <mml:mo>&lt;</mml:mo> <mml:mn>7</mml:mn> <mml:mspace /> <mml:mi>GeV</mml:mi> </mml:mrow> </mml:math></jats:alternatives></jats:inline-formula>. The data are compared to predictions from perturbative QCD in next-to-leading order in the strong coupling, in approximate next-to-next-to-leading order and in full next-to-next-to-leading order. Using also the recently published H1 jet data at high values of <jats:inline-formula><jats:alternatives><jats:tex-math>$$Q^2$$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msup> <mml:mi>Q</mml:mi> <mml:mn>2</mml:mn> </mml:msup> </mml:math></jats:alternatives></jats:inline-formula>, the strong coupling constant <jats:inline-formula><jats:alternatives><jats:tex-math>$$\alpha _s(M_Z)$$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:msub> <mml:mi>α</mml:mi> <mml:mi>s</mml:mi> </mml:msub> <mml:mrow> <mml:mo>(</mml:mo> <mml:msub> <mml:mi>M</mml:mi> <mml:mi>Z</mml:mi> </mml:msub> <mml:mo>)</mml:mo> </mml:mrow> </mml:mrow> </mml:math></jats:alternatives></jats:inline-formula> is determined in next-to-leading order.</jats:p>

Item Type: Article
Depositing User: Symplectic Admin
Date Deposited: 21 Apr 2017 13:36
Last Modified: 01 Sep 2022 07:15
DOI: 10.1140/epjc/s10052-017-4717-9
Open Access URL: https://www-h1.desy.de/psfiles/papers/desy16-200.p...
URI: https://livrepository.liverpool.ac.uk/id/eprint/3007043