Combined QCD and electroweak analysis of HERA data

Abramowicz, H.; Abt, I.; Adamczyk, L.; Adamus, M.; Antonelli, S.; Aushev, V.; Behnke, O.; Behrens, U.; Bertolin, A.; Bhadra, S.; Bloch, I.; Boos, E.; Brock, I.; Brook, N. H.; Brugnera, R.; Bruni, A.; Bussey, P.; Caldwell, A.; Capua, M.; Catterall, C. D.; Chwastowski, J. J.; Ciborowski, J.; Ciesielski, R.; Cooper‐Sarkar, A. M.; Corradi, M.; Dementiev, R. K.; Devenish, R. C. E.; Dusini, S.; Foster, B.; Gach, G. P.; Gallo, E.; Garfagnini, A.; Geiser, A.; Gizhko, A.; Gladilin, L. K.; Golubkov, Yu. A.; Grzelak, G.; Guzik, M. P.; Gwenlan, C.; Hain, W.; Hlushchenko, O.; Hochman, D.; Hori, R.; Ibrahim, Zainol Abidin; Iga, Y.; Ishitsuka, M.; Januschek, F.; Jomhari, N. Z.; Каденко, І.; Kananov, S.; Karshon, U.; Kaur, P.; Kisielewska, D.; Klanner, R.; Klein, U.; Korzhavina, I. A.; Kotański, A.; Kötz, U.; Kovalchuk, N.; Kowalski, H.; Krupa, B.; Kuprash, O.; Kuze, M.; Levchenko, B. B.; Levy, A.; Limentani, S.; Lisovyi, M.; Lobodzinska, E.; Löhr, B.; Lohrmann, E.; Longhin, A.; Lontkovskyi, D.; Lukina, O. Yu.; Makarenko, I.; Malka, J.; Mastroberardino, A.; Idris, F. Mohamad; Nasir, N. Mohammad; Myronenko, V.; Nagano, K.; Nobe, T.; Nowak, R. J.; Onishchuk, Y.; Paul, E.; Perlański, W.; Pokrovskiy, N. S.; Polini, A.; Przybycień, M.; Roloff, P.; Ruspa, M.; Saxon, D. H.; Schioppa, M.; Schneekloth, U.; Schörner-Sadenius, T.; Shcheglova, L.M.; Shevchenko, R.; Shkola, O.; Shyrma, Yu.O.; Singh, Inderpal; Skillicorn, I. O.; Słomiński, W.; Solano, A.; Stančo, L.; Stefaniuk, N.; Stern, A.; Stopa, P.; Sztuk-Dambietz, J.; Tassi, E.; Tokushuku, K.; Tomaszewska, J.; Tsurugai, T.; Turcato, M.; Turkot, O.; Tymieniecka, T.; Verbytskyi, A.; Abdullah, Wan Ahmad Tajuddin Wan; Wichmann, K.; Wing, M.; Yamada, S.; Yamazaki, Y.; Zakharchuk, N.; Żarnecki, A. F.; Zawiejski, L.; Zenaiev, O.; Zhautykov, B.O.; Zotkin, D.S.

doi:10.1103/physrevd.93.092002

Cited by 17 publications

(12 citation statements)

References 57 publications

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“…In section 3 we generalize our model including the construction of an amplitude at short distances, which is able to describe the deep inelastic scattering (DIS). We compare our amplitude with HERA experimental data [33]. In section four we calculate the inclusive cross section, and show that we obtain good agreement with the experimental data.…”

Section: Introductionmentioning

confidence: 52%

A CGC/saturation approach for angular correlations in proton–proton scattering

2017

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We generalized our model for the description of hard processes, and calculate the value of the azimuthal angle correlations ( Fourier harmonics v n ), for proton-proton scattering. The energy and multiplicity independence, as well as the value of v n , turn out the be in accord with the experimental data, or slightly larger. Therefore, before making extreme assumptions on proton-proton collisions, such as the production of quark-gluon plasma in the large multiplicity events, we need to explain how these effect the Bose-Einstein correlations which are so large, that have to be taken into account, and which are able to describe the angular correlations in proton-proton collisions, without including final state interactions.

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Section: Introductionmentioning

confidence: 52%

A CGC/saturation approach for angular correlations in proton–proton scattering

2017

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“…Pioneering measurements in this region were carried out by HERA. A combined QCD analysis on the weak mixing angle at HERA covers a broad high Q 2 region [27], while the precision is significantly lower in the Q 2 region covered by the proposed EIC measurements. The impact of the measurements will depend on the status of searches for physics beyond the Standard Model.…”

Section: Discussionmentioning

confidence: 99%

Neutral-current weak interactions at an EIC

et al. 2017

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A simulation study of measurements of neutral current structure functions of the nucleon at the future high-energy and high-luminosity polarized electron-ion collider (EIC) is presented. A new series of γ − Z interference structure functions, F γZ 1 , F γZ 3 , g γZ 1 , g γZ 5 become accessible via parity-violating asymmetries in polarized electron-nucleon deep inelastic scattering (DIS). Within the context of the quarkparton model, they provide a unique and, in some cases, yet-unmeasured combination of unpolarized and polarized parton distribution functions. The uncertainty projections for these structure functions using electron-proton collisions are considered for various EIC beam energy configurations. Also presented are uncertainty projections for measurements of the weak mixing angle sin 2 θW using electron-deuteron collisions which cover a much higher Q 2 than that is accessible in fixed target measurements. QED and QCD radiative corrections and effects of detector smearing are included with the calculations.PACS. 24.80.+y 24.85.+p 11.30.Er 13.60.Hb

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“…Defining the Laplace transforms f (s, τ ) ≡ L[F S (ν, τ ); s] and g(s, τ ) ≡ L[Ĝ(ν, τ ); s] and using this fact that the Laplace transform of a convolution factors is simply the ordinary product of the Laplace transform of the factors, which have been presented in [27,29], the Laplace transforms of Eqs. (5), and (6) convert to ordinary first-order differential equations in Laplace space s with respect to variable τ . Therefore we will arrive at…”

Section: Singlet Solution In Laplace Space At the Next-to-leadinmentioning

confidence: 99%

Analytic derivation of the next-to-leading order proton structure function F2p(x,Q2) based on the Laplace transformation

Khanpour

Mirjalili

Tehrani³

2017

Phys. Rev. C

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An analytical solution based on the Laplace transformation technique for the Dokshitzer-Gribov-Lipatov-Altarelli-Parisi DGLAP evolution equations is presented at next-to-leading order accuracy in perturbative QCD. This technique is also applied to extract the analytical solution for the proton structure function, F p 2 (x, Q 2 ), in the Laplace s-space. We present the results for the separate parton distributions for all parton species, including valence quark densities, the anti-quark and strange sea parton distribution functions (PDFs), and the gluon distribution. We successfully compare the obtained parton distribution functions and the proton structure function with the results from GJR08 [Eur. Phys. J C 53 (2008) 355-366] and KKT12 [J. Phys. G 40 (2013) 045002] parametrization models as well as the x-space results using QCDnum code. Our calculations show a very good agreement with the available theoretical models as well as the deep inelastic scattering (DIS) experimental data throughout the small and large values of x. The use of our analytical solution to extract the parton densities and the proton structure function is discussed in detail to justify the analysis method considering the accuracy and speed of calculations. Overall, the accuracy we obtain from the analytical solution using the inverse Laplace transform technique is found to be better than 1 part in 10 4 to 10 5 . We also present a detailed QCD analysis of non-singlet structure functions using all available DIS data to perform global QCD fits. In this regard we employ the Jacobi polynomial approach to convert the results from Laplace s space to Bjorken x space. The extracted valence quark densities are also presented and compared to the JR14, MMHT14, NNPDF and CJ15 PDFs sets. We evaluate the numerical effects of target mass corrections (TMCs) and higher twist (HT) terms on various structure functions, and compare fits to data with and without these corrections.

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Combined QCD and electroweak analysis of HERA data

Cited by 17 publications

References 57 publications

A CGC/saturation approach for angular correlations in proton–proton scattering

A CGC/saturation approach for angular correlations in proton–proton scattering

Neutral-current weak interactions at an EIC

Analytic derivation of the next-to-leading order proton structure function F2p(x,Q2) based on the Laplace transformation

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