The quantum entanglement between colorful dark energy universes in a colorful multiverse

2013 ◽  
Vol 91 (3) ◽  
pp. 256-259 ◽  
Author(s):  
Alireza Sepehri ◽  
Somayyeh Shoorvazi ◽  
Mohammad Ebrahim Zomorrodian
Keyword(s):  
Dark Energy ◽  
Cross Section ◽  
Production Cross ◽  
Color Singlet ◽  
Proton Proton ◽  
Proton Collisions ◽  
Color Confinement ◽  
Proton Proton Collisions ◽  
Typical Length ◽  
Baby Universe

Recently, a model for colorful black hole production and decay in proton–proton collisions has been constructed. These results can be extended to a multiverse, because it is obvious that there is enough energy in cosmic rays to produce a baby Universe. It is observed that these Universes are defined by their gauge charges. Notably, Universes can have a color charge. This is not in contradiction with confinement because the typical length scale of QCD (i.e., a Fermi) is much larger than the size of a baby Universe at its birth. These colorful Universes can interact with each other, annihilate, and form a color singlet Universe. Next, it is argued that color confinement may generate an entanglement between colorful dark energy Universes to form a color singlet binary system. Finally, the production cross section for entangled colorful dark energy Universes in a multiverse is obtained. It is found that the cross section of a Friedmann–Robertson–Walker Universe is much larger for smaller values of the Hubble parameter. Also, this cross section is greater for entangled open Universes and smaller for entangled closed Universes.

scholarly journals Cross Section Prediction for Inclusive Production of Z Boson in pp Collisions at s=14 TeV: A Study of Systematic Uncertainty due to Scale Dependence

2017 ◽  
Vol 2017 ◽  
pp. 1-8 ◽  
Author(s):  
Hasan Ogul ◽  
Kamuran Dilsiz
Keyword(s):  
Cross Section ◽  
Production Cross Section ◽  
Z Boson ◽  
Production Cross ◽  
Branching Ratio ◽  
Leading Order ◽  
Proton Proton ◽  
Proton Collisions ◽  
Central Values ◽  
Proton Proton Collisions

Prediction of Z→l+l- production cross section (where l±=e±,μ±) in proton-proton collisions at s=14 TeV is estimated up to next-to-next-to-leading order (NNLO) in perturbative QCD including next-to-leading order (NLO) electroweak (EW) corrections. The total inclusive Z boson production cross section times leptonic branching ratio, within the invariant mass window 66<mll<116 GeV, is predicted using NNLO HERAPDF2.0 at NNLO QCD and NLO EW as σZTot=2111.69-26.92+26.31 (PDF) ±11 (αs) ±17 (scale) -30.98+57.41 (parameterization and model). Theoretical prediction of the fiducial cross section is further computed with the latest modern PDF models (CT14, MMHT2014, NNPDF3.0, HERAPDF2.0, and ABM12) at NNLO for QCD and NLO for EW. The central values of the predictions are based on DYNNLO 1.5 program and the uncertainties are extracted using FEWZ 3.1 program. In addition, the cross section is also calculated as functions of μR and μF scales. The choice of μR and μF for scale variation uncertainty is further discussed in detail.

scholarly journals THE MESON PRODUCTION IN PROTON–PROTON COLLISIONS IN NEXT-TO-LEADING ORDER AND INFRARED RENORMALONS

2011 ◽  
Vol 20 (05) ◽  
pp. 1243-1270 ◽  
Author(s):  
A. I. AHMADOV ◽  
R. M. BURJALIYEV
Keyword(s):  
Cross Section ◽  
Cross Sections ◽  
Production Cross ◽  
Meson Production ◽  
Leading Order ◽  
Proton Proton ◽  
Proton Collisions ◽  
Running Coupling ◽  
Coupling Approach ◽  
Proton Proton Collisions

In this paper, we investigate the next-to-leading order contribution of the higher-twist Feynman diagrams to the large-pT inclusive pion production cross-section in proton–proton collisions and present the general formulae for the higher-twist differential cross-sections in the case of the running coupling and frozen coupling approaches. We compared the resummed next-to-leading order higher-twist cross-sections with the ones obtained in the framework of the frozen coupling approach and leading-twist cross-section. The structure of infrared renormalon singularities of the higher-twist subprocess cross-section and its resummed expression (the Borel sum) are found. It is shown that the resummed result depends on the choice of the meson wave functions used in the calculations. We discuss the phenomenological consequences of possible higher-twist contributions to the meson production in proton–proton collisions in next-to-leading order at RHIC.

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