title: AdS/QCD ÐºÐ²Ð°ÑÐº-Ð´Ð¸ÐºÐ²Ð°ÑÐºÐ¾Ð²Ð°Ñ Ð½ÑÐºÐ»Ð¾Ð½Ð°Ñ Ð¼Ð¾Ð´ÐµÐ»Ñ Ð¾Ð±ÑÐ°Ð·Ð¾Ð²Ð°Ð½Ð¸Ñ Ð°Ð´ÑÐ¾Ð½Ð¾Ð² Ð² ÑÑÐ¾Ð»ÐºÐ½Ð¾Ð²ÐµÐ½Ð¸ÑÑ pp, pA Ð¸ ÐÐ
title: Ð²ÑÐ¿ÑÑÐºÐ½Ð°Ñ ÐºÐ²Ð°Ð»Ð¸ÑÐ¸ÐºÐ°ÑÐ¸Ð¾Ð½Ð½Ð°Ñ ÑÐ°Ð±Ð¾ÑÐ° Ð¼Ð°Ð³Ð¸ÑÑÑÐ°
titleType: Subtitle
title: A light-front AdS/QCD quark-diquark nucleon model in proton-proton and heavy-ion collisions
Creators: name: Ð Ð¾Ð´ÑÐ¸Ð³ÐµÑ ÐÐ³Ð¸Ð»Ð°Ñ, ÐÑÐ¸Ñ
Publisher: name: Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³ÑÐºÐ¸Ð¹ Ð¿Ð¾Ð»Ð¸ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¸Ð¹ ÑÐ½Ð¸Ð²ÐµÑÑÐ¸ÑÐµÑ ÐÐµÑÑÐ° ÐÐµÐ»Ð¸ÐºÐ¾Ð³Ð¾
Year: 2021
Subjects: ÐºÐ²Ð°Ð½ÑÐ¾Ð²Ð°Ñ Ñ ÑÐ¾Ð¼Ð¾Ð´Ð¸Ð½Ð°Ð¼Ð¸ÐºÐ°
ÐÐ¥Ð Ð½Ð° ÑÐ²ÐµÑÐ¾Ð²Ð¾Ð¼ ÑÑÐ¾Ð½ÑÐµ
Ð³Ð¾Ð»Ð¾Ð³ÑÐ°ÑÐ¸Ñ
Ð´ÑÐ°Ð»ÑÐ½Ð¾ÑÑÑ ÐºÐ°Ð»Ð¸Ð±ÑÐ¾Ð²ÐºÐ¸/Ð³ÑÐ°Ð²Ð¸ÑÐ°ÑÐ¸Ð¸
AdS/QCD ÑÐ²ÐµÑÐ¾Ð²Ð¾Ð³Ð¾ ÑÑÐ¾Ð½ÑÐ°
ÑÐ¸Ð·Ð¸ÐºÐ° Ð°Ð´ÑÐ¾Ð½Ð¾Ð²
Ð´Ð¸ÐºÐ²Ð°ÑÐºÐ¸
ÑÑÐ½ÐºÑÐ¸Ð¸ ÑÐ°ÑÐ¿ÑÐµÐ´ÐµÐ»ÐµÐ½Ð¸Ñ Ð¿Ð°ÑÑÐ¾Ð½Ð°
Ð¶ÑÑÑÐºÐ¸Ðµ Ð´Ð¸ÐºÐ²Ð°ÑÐºÐ¾Ð²ÑÐµ Ð¿ÑÐ¾ÑÐµÑÑÑ
Ð¿ÑÐ¾ÑÐ¾Ð½-Ð¿ÑÐ¾ÑÐ¾Ð½Ð½ÑÐµ ÑÑÐ¾Ð»ÐºÐ½Ð¾Ð²ÐµÐ½Ð¸Ñ
ÑÑÐ¾Ð»ÐºÐ½Ð¾Ð²ÐµÐ½Ð¸Ñ ÑÑÐ¶ÐµÐ»ÑÑ Ð¸Ð¾Ð½Ð¾Ð²
quantum chromodynamics
light-front QCD
holography
gauge/gravity duality
lifht-front AdS/QCD
hadron physics
diquarks
parton distribution functions
diquark hard processes
proton-proton collisions
heavy-ion collisions

description: Ð¢ÐµÐ¼Ð° Ð²ÑÐ¿ÑÑÐºÐ½Ð¾Ð¹ ÐºÐ²Ð°Ð»Ð¸ÑÐ¸ÐºÐ°ÑÐ¸Ð¾Ð½Ð½Ð¾Ð¹ ÑÐ°Ð±Ð¾ÑÑ: &lt;&gt;. Ð Ð½Ð°ÑÑÐ¾ÑÑÐµÐ¹ ÑÐ°Ð±Ð¾ÑÐµ Ð¿ÑÐµÐ´ÑÑÐ°Ð²Ð»ÐµÐ½Ð° ÑÐµÐ½Ð¾Ð¼ÐµÐ½Ð¾Ð»Ð¾Ð³Ð¸ÑÐµÑÐºÐ°Ñ ÐºÐ²Ð°ÑÐº-Ð´Ð¸ÐºÐ²Ð°ÑÐºÐ¾Ð²Ð°Ñ Ð¼Ð¾Ð´ÐµÐ»Ñ Ð½ÑÐºÐ»Ð¾Ð½Ð¾Ð². ÐÐ¾Ð´ÐµÐ»Ñ Ð¾ÑÐ½Ð¾Ð²Ð°Ð½Ð° Ð½Ð° ÐºÐ²Ð°Ð½ÑÐ¾Ð²Ð¾Ð¹ ÑÑÐ¾Ð¼Ð¾Ð´Ð¸Ð½Ð°Ð¼Ð¸ÐºÐµ Ð½Ð° ÑÐ²ÐµÑÐ¾Ð²Ð¾Ð¼ ÑÑÐ¾Ð½ÑÐµ Ð¸ Ð¼ÑÐ³ÐºÐ¾Ð¹ ÑÑÐµÐ½ÐºÐµ AdS/QCD ÑÐ¾Ð¾ÑÐ²ÐµÑÑÑÐ²Ð¸Ñ. ÐÑÑÐµÑÐ¿Ð¾Ð¼ÑÐ½ÑÑÐ°Ñ Ð¼Ð¾Ð´ÐµÐ»Ñ Ð¸ÑÐ¿Ð¾Ð»ÑÐ·Ð¾Ð²Ð°Ð½Ð° Ð¿ÑÐ¸ Ð¼Ð¾Ð´ÐµÐ»Ð¸ÑÐ¾Ð²Ð°Ð½Ð¸Ð¸ ÑÑÐ¾Ð»ÐºÐ½Ð¾Ð²ÐµÐ½Ð¸Ð¹ Ð°Ð´ÑÐ¾Ð½Ð¾Ð² Ð²ÑÑÐ¾ÐºÐ¸Ñ ÑÐ½ÐµÑÐ³Ð¸Ð¹. ÐÐ¾Ð´ÐµÐ»Ñ ÑÐ¾Ð´ÐµÑÐ¶Ð¸Ñ ÐºÐ°Ðº ÑÐºÐ°Ð»ÑÑÐ½ÑÐµ (Ð¸Ð·Ð¾ÑÐºÐ°Ð»ÑÑÐ½Ð¾-ÑÐºÐ°Ð»ÑÑÐ½ÑÐ¹ ÑÐ¸Ð½Ð³Ð»ÐµÑ Ð´Ð¸ÐºÐ²Ð°ÑÐºÐ°), ÑÐ°Ðº Ð¸ Ð°ÐºÑÐ¸Ð°Ð»ÑÐ½Ð¾-Ð²ÐµÐºÑÐ¾ÑÐ½ÑÐµ (Ð¸Ð·Ð¾ÑÐºÐ°Ð»ÑÑÐ½Ð¾-Ð²ÐµÐºÑÐ¾ÑÐ½ÑÐ¹ Ð´Ð¸ÐºÐ²Ð°ÑÐº Ð¸ Ð¸Ð·Ð¾Ð²ÐµÐºÑÐ¾ÑÐ½Ð¾-Ð²ÐµÐºÑÐ¾ÑÐ½ÑÐ¹ Ð´Ð¸ÐºÐ²Ð°ÑÐº) ÑÐ¾ÑÑÐ¾ÑÐ½Ð¸Ñ, ÑÑÐ°ÑÑÐ²ÑÑÑÐµÐµ Ð² Ð¿ÑÐ¾ÑÐµÑÑÐµ Ð¶ÐµÑÑÐºÐ¾Ð³Ð¾ ÑÐ°ÑÑÐµÑÐ½Ð¸Ñ Ð½Ð°ÑÑÐ´Ñ Ñ ÐºÐ²Ð°ÑÐºÐ°Ð¼Ð¸ Ð¸ Ð³Ð»ÑÐ¾Ð½Ð°Ð¼Ð¸ Ð² ÑÑÐ¾Ð»ÐºÐ½Ð¾Ð²ÐµÐ½Ð¸ÑÑ ÑÐ°ÑÑÐ¸Ñ. Ð¢Ð°ÐºÐ¸Ðµ Ð¿ÑÐ¾ÑÐµÑÑÑ Ð±ÑÐ»Ð¸ ÑÐµÐ°Ð»Ð¸Ð·Ð¾Ð²Ð°Ð½Ñ Ð² Ð¿Ð°ÐºÐµÑÐµ Ð¼Ð¾Ð´ÐµÐ»Ð¸ÑÐ¾Ð²Ð°Ð½Ð¸Ñ PYTHIA. ÐÐ»Ð°Ð³Ð¾Ð´Ð°ÑÑ Ð¼ÐµÑÐ°Ð½Ð¸Ð·Ð¼Ñ Ð°Ð´ÑÐ¾Ð½Ð¸Ð·Ð°ÑÐ¸Ð¸, ÑÐ¶Ðµ ÑÑÑÐµÑÑÐ²ÑÑÑÐµÐ¼Ñ Ð² PYTHIA, Ð¼Ñ ÑÐ¼Ð¾Ð³Ð»Ð¸ ÑÑÐ°Ð²Ð½Ð¸ÑÑ ÑÐ°ÑÑÑÐ¸ÑÐ°Ð½Ð½ÑÐµ Ð¸ ÑÐºÑÐ¿ÐµÑÐ¸Ð¼ÐµÐ½ÑÐ°Ð»ÑÐ½ÑÐµ (ALICE) Ð·Ð°Ð²Ð¸ÑÐ¸Ð¼Ð¾ÑÑÐ¸ Ð¾Ñ Ð¿Ð¾Ð¿ÐµÑÐµÑÐ½Ð¾Ð³Ð¾ Ð¸Ð¼Ð¿ÑÐ»ÑÑÐ° Ð¾ÑÐ½Ð¾ÑÐµÐ½Ð¸Ñ ÑÑÐµÐ´Ð½Ð¸Ñ Ð¼Ð½Ð¾Ð¶ÐµÑÑÐ²ÐµÐ½Ð½Ð¾ÑÑÐµÐ¹ \linebreak (Ð¿ÑÐ¾ÑÐ¾Ð½Ð¾Ð²+Ð°Ð½ÑÐ¸Ð¿ÑÐ¾ÑÐ¾Ð½Ð¾Ð²) Ðº ($\pi^+ + \pi^-$) , Ð¿Ð¾Ð»ÑÑÐµÐ½Ð½ÑÐµ Ð¿ÑÐ¸ ÑÑÐ¾Ð»ÐºÐ½Ð¾Ð²ÐµÐ½Ð¸ÑÑ Ð¿ÑÐ¾ÑÐ¾Ð½-Ð¿ÑÐ¾ÑÐ¾Ð½ Ð² Ð¾Ð±Ð»Ð°ÑÑÐ¸ Ð¿Ð¾Ð¿ÐµÑÐµÑÐ½Ð¾Ð³Ð¾ Ð¸Ð¼Ð¿ÑÐ»ÑÑÐ° $0\lesssim p_T \leq 20$ ÐÑÐ Ð¿ÑÐ¸ $\sqrt{s} = 13$ Ð¢ÑÐ. Ð Ð°ÑÑÐµÑÑ Ð²ÑÐ¿Ð¾Ð»Ð½ÑÐ»Ð¸ÑÑ Ñ Ð¿ÑÐ¾ÑÐµÑÑÐ°Ð¼Ð¸, ÑÑÑÐ°Ð½Ð¾Ð²Ð»ÐµÐ½Ð½ÑÐ¼Ð¸ Ð² PYTHIA Ð¿Ð¾ ÑÐ¼Ð¾Ð»ÑÐ°Ð½Ð¸Ñ, Ð´Ð»Ñ ÑÐ½ÐµÑÐ³Ð¸Ð¹ ALICE Ð¸ Ñ Ð¸ÑÐ¿Ð¾Ð»ÑÐ·Ð¾Ð²Ð°Ð½Ð¸ÐµÐ¼ Ð²ÑÑÐµÑÐ¿Ð¾Ð¼ÑÐ½ÑÑÐ¾Ð¹ ÑÐµÐ½Ð¾Ð¼ÐµÐ½Ð¾Ð»Ð¾Ð³Ð¸ÑÐµÑÐºÐ¾Ð¹ ÐºÐ²Ð°ÑÐº-Ð´Ð¸ÐºÐ²Ð°ÑÐºÐ¾Ð²Ð¾Ð¹ Ð¼Ð¾Ð´ÐµÐ»Ð¸ Ð½ÑÐºÐ»Ð¾Ð½Ð¾Ð². Ð£ÑÑÐ°Ð½Ð¾Ð²Ð»ÐµÐ½Ð¾, ÑÑÐ¾ ÐºÐ²Ð°ÑÐº-Ð´Ð¸ÐºÐ²Ð°ÑÐºÐ¾Ð²Ð°Ñ Ð½ÑÐºÐ»Ð¾Ð½Ð°Ñ Ð¼Ð¾Ð´ÐµÐ»Ñ Ð¿Ð¾ÐºÐ°Ð·ÑÐ²Ð°ÐµÑ ÑÐ²ÐµÐ»Ð¸ÑÐµÐ½Ð¸Ðµ Ð²ÑÑÐ¾Ð´Ð° Ð±Ð°ÑÐ¸Ð¾Ð½Ð¾Ð² Ð² Ð¾Ð±Ð»Ð°ÑÑÐ¸ $2\lesssim p_T \lesssim 4$ ÐÑÐ, ÑÑÐ¾ Ð»ÑÑÑÐµ ÑÐ¾Ð³Ð»Ð°ÑÑÐµÑÑÑ Ñ ÑÐºÑÐ¿ÐµÑÐ¸Ð¼ÐµÐ½ÑÐ°Ð»ÑÐ½ÑÐ¼Ð¸ Ð´Ð°Ð½Ð½ÑÐ¼Ð¸, ÑÐµÐ¼ ÑÑÐ°Ð½Ð´Ð°ÑÑÐ½ÑÐµ Ð¼Ð¾Ð´ÐµÐ»Ð¸ PYTHIA, ÐºÐ¾ÑÐ¾ÑÑÐµ ÑÐ°ÑÑÐ¼Ð°ÑÑÐ¸Ð²Ð°ÑÑ ÑÐ¾Ð»ÑÐºÐ¾ ÐºÐ²Ð°ÑÐºÐ¸ Ð¸ Ð³Ð»ÑÐ¾Ð½Ñ Ð² Ð¶ÐµÑÑÐºÐ¸Ñ Ð¿ÑÐ¾ÑÐµÑÑÐ°Ñ. Ð§ÑÐ¾ ÐºÐ°ÑÐ°ÐµÑÑÑ ÑÑÐ¶ÐµÐ»ÑÑ Ð¸Ð¾Ð½Ð¾Ð², Ð¼Ñ ÑÑÐ°Ð²Ð½Ð¸Ð»Ð¸ ÑÐµÐ·ÑÐ»ÑÑÐ°ÑÑ Ð¸ÑÐ¿Ð¾Ð»ÑÐ·Ð¾Ð²Ð°Ð½Ð¸Ñ Ð¼Ð¾Ð´ÐµÐ»Ð¸ ÐºÐ²Ð°ÑÐº-Ð´Ð¸ÐºÐ²Ð°ÑÐºÐ¾Ð²ÑÑ Ð½ÑÐºÐ»Ð¾Ð½Ð¾Ð² Ñ Ð´Ð°Ð½Ð½ÑÐ¼Ð¸ ÑÐºÑÐ¿ÐµÑÐ¸Ð¼ÐµÐ½ÑÐ° PHENIX Ð² ÑÑÐ¾Ð»ÐºÐ½Ð¾Ð²ÐµÐ½Ð¸ÑÑ HeAu Ð¿ÑÐ¸ $\sqrt{s} = 200$ ÐÑÐ. ÐÐ¾Ð»ÑÑÐµÐ½Ð¾ Ð»ÑÑÑÐµÐµ ÑÐ¾Ð³Ð»Ð°ÑÐ¸Ðµ Ð´Ð»Ñ Ð¾ÑÐ½Ð¾ÑÐµÐ½Ð¸Ð¸ $p/\pi^+$, ÑÐµÐ¼ Ð¿ÑÐ¸ Ð¸ÑÐ¿Ð¾Ð»ÑÐ·Ð¾Ð²Ð°Ð½Ð¸Ð¸ Ð¼Ð¾Ð´ÐµÐ»Ð¸ PYTHIA Ñ Ð¿Ð°ÑÐ°Ð¼ÐµÑÑÐ°Ð¼Ð¸ Ð¿Ð¾ ÑÐ¼Ð¾Ð»ÑÐ°Ð½Ð¸Ñ . Ð¢Ð°ÐºÐ¶Ðµ Ð±ÑÐ»Ð¸ Ð¿ÑÐ¾Ð²ÐµÐ´ÐµÐ½Ñ ÑÐ°ÑÑÐµÑÑ ÑÑÐ¾Ð»ÐºÐ½Ð¾Ð²ÐµÐ½Ð¸Ð¹ pAu Ð¸ AuAu, ÑÑÐ°Ð²Ð½Ð¸Ð²Ð°ÑÑÐ¸Ðµ Ð¼Ð¾Ð´ÐµÐ»Ñ ÐºÐ²Ð°ÑÐº-Ð´Ð¸ÐºÐ²Ð°ÑÐºÐ° Ñ Ð´ÑÑÐ³Ð¸Ð¼Ð¸ Ð¼Ð¾Ð´ÐµÐ»ÑÐ¼Ð¸ Ð² PYTHIA. Ð Ð°Ð±Ð¾ÑÐ° Ð¿ÑÐ¾Ð²ÐµÐ´ÐµÐ½Ð° Ð½Ð° Ð±Ð°Ð·Ðµ ÐÑÑÑÐµÐ¹ Ð¸Ð½Ð¶ÐµÐ½ÐµÑÐ½Ð¾-ÑÐ¸Ð·Ð¸ÑÐµÑÐºÐ¾Ð¹ ÑÐºÐ¾Ð»Ñ Ð¡ÐÐÐÐ£. Ð­ÑÐ° ÑÐ°Ð±Ð¾ÑÐ° Ð±ÑÐ»Ð° Ð¿Ð¾Ð´Ð´ÐµÑÐ¶Ð°Ð½Ð° SecretarÃ­a Nacional de Ciencia y TecnologÃ­a (Ref. Grant FINDECYT/EDUCA CTi 02-2019).
description: The subject of the graduate qualification work is "A light-front AdS/QCD quark-diquark nucleon model in hadron production in proton-proton and heavy-ion collisions". This work discusses a phenomenological quark-diquark nucleon model based on light-front soft-wall AdS/QCD holography able to be used in hadron collision simulations. The light-front holography has predicted two particle bound state wave function inside nucleons which can not be derived simply from a picture of valence quarks, namely diquarks. In this framework, from the construction of phenomenological diquark Parton Distribution Functions based on light-front QCD and soft-wall AdS/QCD, as well as, due to consequences of the color gauge $SU(3)_c$ in QCD, we have armed a nucleon model and implemented it into the PYTHIA simulation package. The quark-diquark nucleon model contains both scalar (isoscalar-scalar diquark singlet) state and axial-vector (isoscalar-vector diquark and isovector-vector diquark) state as \linebreak participating in hard-scattering process alongside quarks and gluons in particle \linebreak collisions. Thanks to the hadronization machinery already existing in PYTHIA, we were able to compare the model in the proton-to-pion ratios in proton-proton collisions at transverse momentum region $0\lesssim p_T \leq 20$ GeV at $\sqrt{s} = 13$ TeV with default PYTHIA processes and experimental data from ALICE experiment. The quark-diquark model shows a enhancement of baryon production in the region $2\lesssim p_T \lesssim 4$ GeV, being in better agreement with experimental data than default PYTHIA models, which only consider quarks and gluons in hard processes. On the side of heavy-ions, we compared the quark-diquark nucleon model to data from PHENIX experiment in HeAu collisions at $\sqrt{s} = 200$ GeV, obtaining a better agreement in the $p/\pi^+$ ratio than the default models in PYTHIA. Also were performed simulations of pAu and AuAu collisions comparing the quark-diquark model to other models in PYTHIA. The work was carried out on the basis of the Higher Engineering Physics School of the Peter the Great St. Petersburg Polytechnic University. This work was supported by the SecretarÃ­a Nacional de Ciencia y TecnologÃ­a (Ref. Grant FINDECYT/EDUCA CTi 02-2019)