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This thesis studies gluon saturation in hadronic matter at high energy by calculating next-to-leading order (NLO) corrections to inclusive and diffractive deep inelastic scattering cross sections in the Color Glass Condensate (CGC)…

High Energy Physics - Phenomenology · Physics 2021-12-17 H. Hänninen

The next-to-leading order (NLO) corrections to the BFKL equation in the BLM optimal scale setting are briefly discussed. A striking feature of the BLM approach is rather weak Q^2-dependence of the Pomeron intercept, which might indicate an…

High Energy Physics - Phenomenology · Physics 2016-11-23 Victor T. Kim , Lev N. Lipatov , Grigorii B. Pivovarov

We perform a global analysis of HERA total inclusive cross section and charm quark production data to extract the non-perturbative initial condition for the next-to-leading order Balitsky-Kovchegov (BK) equation. We extend our previous…

High Energy Physics - Phenomenology · Physics 2026-04-27 Carlisle Casuga , Heikki Mäntysaari

When computed to next-to-leading order in perturbative QCD, the non-linear Balitsky-Kovchegov (BK) equation for the high-energy evolution of the dipole-hadron scattering appears to be unstable. We show that this instability can be avoided…

High Energy Physics - Phenomenology · Physics 2021-02-03 B. Ducloué , E. Iancu , A. H. Mueller , G. Soyez , D. N. Triantafyllopoulos

We report the results of a computation of the full next-to-leading order QCD corrections to the production of two $b\bar{b}$ pairs at the LHC. This calculation at the parton level provides predictions for well separated $b$-jets. The…

High Energy Physics - Phenomenology · Physics 2011-09-29 Nicolas Greiner , Alberto Guffanti , Thomas Reiter , Jürgen Reuter

We compute next-to-next-to-leading order QCD corrections to the partonic processes $b\to c \bar{u} d$ and $b\to c \bar{c} s$, which constitute the dominant decay channels in standard model predictions for $B$-meson lifetimes within the…

High Energy Physics - Phenomenology · Physics 2024-07-11 Manuel Egner , Matteo Fael , Kay Schönwald , Matthias Steinhauser

By employing the perturbative QCD (PQCD) factorization approach, we calculated the branching ratios, CP-violating asymmetries, the longitudinal and transverse polarization fractions and other physical observables of the thirteen charmless…

High Energy Physics - Phenomenology · Physics 2018-09-26 Da-Cheng Yan , Xin Liu , Zhen-Jun Xiao

In this paper, we investigate the factorization hypothesis step by step for the exclusive process $B \to \rho$ at next-to-leading order (NLO) with the collinear factorization approach, and then we extend our results to the $k_T$…

High Energy Physics - Phenomenology · Physics 2019-01-16 Jun Hua , Ya-Lan Zhang , Zhen-Jun Xiao

In this paper we calculate the next-to-leading-order (NLO) corrections to $\rho$-meson electromagnetic form factors by employing the $k_T$ factorization approach. We find that the NLO correction to $F_i (Q^2)(i=LT,TL)$ is around $30\%$ of…

High Energy Physics - Phenomenology · Physics 2020-01-08 Ya-lan Zhang , Jun Hua , Dong-Sheng Li , Zhen-Jun Xiao

We explore the subleading-N_c corrections to the large-N_c Balitsky-Kovchegov (BK) evolution equation by comparing its solution to that of the all-N_c Jalilian-Marian-Iancu-McLerran-Weigert-Leonidov-Kovner (JIMWLK) equation. In earlier…

High Energy Physics - Phenomenology · Physics 2009-11-19 Yuri V. Kovchegov , Janne Kuokkanen , Kari Rummukainen , Heribert Weigert

We compute the next-to-next-to-leading order QCD corrections for Standard Model Higgs boson pair production inclusive cross section at hadron colliders within the large top-mass approximation. We provide numerical results for the LHC,…

High Energy Physics - Phenomenology · Physics 2013-12-24 Daniel de Florian , Javier Mazzitelli

By employing the perturbative QCD (PQCD) factorization approach, we studied the sixteen $B/B_s \to \eta_c (\pi, K, \eta^{(\prime)},\rho,K^*,\omega,\phi)$ decays with the inclusion of the currently known next-to-leading order (NLO)…

High Energy Physics - Phenomenology · Physics 2020-02-26 Zhen-Jun Xiao , Da-Cheng Yan , Xin Liu

With a view to study the convergence properties of the derivative expansion of the exact renormalization group (RG) equation, I explicitly study the leading and next-to-leading orders of this expansion applied to the Wilson-Polchinski…

High Energy Physics - Theory · Physics 2009-11-11 C. Bervillier

We present the theoretical predictions including the complete next-to-leading order (NLO) QCD corrections to the top-quark pair production in association with a photon at the LHC with center-of-mass system energy of $7 {\rm TeV}$. The…

High Energy Physics - Phenomenology · Physics 2015-05-30 Duan Peng-Fei , Zhang Ren-You , Ma Wen-Gan , Han Liang , Guo Lei , Wang Shao-Ming

We present the calculations of the complete next-to-leading order (NLO) QCD corrections to the total cross section, invariant mass distribution and the forward-backward asymmetry ($\rm A_{FB}$) of top quark pair production mediated by $W'$…

High Energy Physics - Phenomenology · Physics 2015-06-03 Kai Yan , Jian Wang , Ding Yu Shao , Chong Sheng Li

We determine the initial condition of the Balitsky-Kovchegov evolution equation at next-to-leading order (NLO) accuracy using HERA deep inelastic scattering data. Posterior distributions characterizing the initial condition are extracted…

High Energy Physics - Phenomenology · Physics 2025-08-07 Carlisle Casuga , Henri Hänninen , Heikki Mäntysaari

Within the Color Glass Condensate effective theory, we reconsider the next-to-leading order (NLO) calculation of the single inclusive particle production at forward rapidities in proton-nucleus collisions at high energy. Focusing on quark…

High Energy Physics - Phenomenology · Physics 2017-02-01 E. Iancu , A. H. Mueller , D. N. Triantafyllopoulos

We calculate next-to-leading-order (NLO) corrections to the $B\to\pi$ transition form factors at leading twist in the $k_T$ factorization theorem. Light partons off-shell by $k_T^2$ are considered in the quark diagrams, in the effective…

High Energy Physics - Phenomenology · Physics 2013-05-30 Hsiang-nan Li , Yue-Long Shen , Yu-Ming Wang

Applying the light-cone sum rules (LCSR) approach, the next-to-leading-order (NLO) corrections to $B \to A$ form factors are calculated with the twist-two and twist-three $B$ meson light-cone distribution amplitudes (LCDAs) at leading power…

High Energy Physics - Phenomenology · Physics 2025-12-04 Fang-Zhou Di , Yu-Hao Liu

Within the nonrelativistic QCD (NRQCD) factorization framework, we have computed the ${\mathcal O}(\alpha_s^2)$ corrections to the exclusive production of $P$-wave spin-triplet charmonia $\chi_{cJ}(J=0,1,2)$ accompanied by a hard photon at…

High Energy Physics - Phenomenology · Physics 2020-12-02 Wen-Long Sang , Feng Feng , Yu Jia