Prospects of Ξ(1530)0Ξ̄(1530)0pair production at BESIII

2019 ◽  
Vol 34 (01) ◽  
pp. 1950008
Author(s):  
Xu-Ning Ma ◽  
Qing-Ping Ji ◽  
Bin Wang ◽  
Xiao-Shen Kang ◽  
Li Gong ◽  
...  
Keyword(s):  
Monte Carlo ◽  
Angular Distribution ◽  
Pair Production ◽  
Quantum Chromodynamics ◽  
Monte Carlo Study ◽  
Decay Angular Distribution ◽  
Perturbative Quantum Chromodynamics ◽  
Theoretical Predictions ◽  
Perturbative Quantum ◽  
Charmonium States

The study of the baryon–antibaryon pair production from the charmonium states provides a favorable test and an input for the perturbative quantum chromodynamics calculation. Based on a Monte Carlo study via a single tag baryon strategy, a clear observation of [Formula: see text](3686)[Formula: see text](1530)[Formula: see text](1530)0is predicted at BESIII with the current 3.08[Formula: see text]106[Formula: see text](3686) dataset. The averaged precision of the [Formula: see text] parameters in the decay angular distribution formula is estimated as 0.25, and is not effective to separate the theoretical predictions. It will be an opportunity to distinguish them with 3.0[Formula: see text]109[Formula: see text](3686) events taken by BESIII detector in the next few years.

scholarly journals Azimuthal separation in nearly back-to-back jet topologies in inclusive 2- and 3-jet events in $${\text {p}} {\text {p}} $$ collisions at $$\sqrt{s}=13\,\text {Te}\text {V} $$

2019 ◽  
Vol 79 (9) ◽  
Author(s):  
A. M. Sirunyan ◽  
◽  
A. Tumasyan ◽  
W. Adam ◽  
F. Ambrogi ◽  
...  
Keyword(s):  
Center Of Mass ◽  
Proton Collision ◽  
Leading Order ◽  
Proton Proton ◽  
Perturbative Quantum Chromodynamics ◽  
Center Of Mass Energy ◽  
Theoretical Predictions ◽  
Proton Proton Collision ◽  
Perturbative Quantum ◽  
Two Jets

Abstract A measurement for inclusive 2- and 3-jet events of the azimuthal correlation between the two jets with the largest transverse momenta, $$\varDelta \phi _{12}$$Δϕ12, is presented. The measurement considers events where the two leading jets are nearly collinear (“back-to-back”) in the transverse plane and is performed for several ranges of the leading jet transverse momentum. Proton-proton collision data collected with the CMS experiment at a center-of-mass energy of $$13\,\text {Te}\text {V} $$13Te and corresponding to an integrated luminosity of $$35.9{\,\text {fb}^{-1}} $$35.9fb-1 are used. Predictions based on calculations using matrix elements at leading-order and next-to-leading-order accuracy in perturbative quantum chromodynamics supplemented with leading-log parton showers and hadronization are generally in agreement with the measurements. Discrepancies between the measurement and theoretical predictions are as large as 15%, mainly in the region $$177^\circ< \varDelta \phi _{12} < 180^\circ $$177∘<Δϕ12<180∘. The 2- and 3-jet measurements are not simultaneously described by any of models.

Strangeness-changing nonlepton decays of the kaons, hyperons, and the Ω− particle

1982 ◽  
Vol 60 (4) ◽  
pp. 405-423 ◽  
Author(s):  
H. C. Lee ◽  
K. B. Winterbon
Keyword(s):  
Quantum Chromodynamics ◽  
Short Distance ◽  
P Wave ◽  
Radiative Corrections ◽  
Wilson Coefficient ◽  
S Wave ◽  
Perturbative Quantum Chromodynamics ◽  
Hyperon Decays ◽  
Perturbative Quantum ◽  
Nonleptonic Decays

We try to understand the strangeness changing nonleptonic decays of kaons, hyperons, and the Ω− particle in terms of the modern, renormalized weak Hamiltonian expressed as a sum of four-quark Wilson operators, including the so-called penguin operators c5O5 and c6O6 arising from gluon radiative corrections. It is found that these decays, including the long-standing s-wave/p-wave puzzle in hyperon decays, can be understood if the Wilson coefficient [Formula: see text] has a sign opposite to that obtained from short-distance perturbative quantum chromodynamics calculations and has an effective value such that [Formula: see text].

Scaling violations and perturbative quantum chromodynamics

1979 ◽  
Vol 81 (2) ◽  
pp. 207-210 ◽  
Author(s):  
R. Barbieri ◽  
L. Caneschi ◽  
G. Curci ◽  
E. d'Emilio
Keyword(s):  
Quantum Chromodynamics ◽  
Perturbative Quantum Chromodynamics ◽  
Perturbative Quantum ◽  
Scaling Violations

scholarly journals Measurements of jet-related observables at the LHC

2015 ◽  
Vol 30 (31) ◽  
pp. 1546004 ◽  
Author(s):  
P. Kokkas
Keyword(s):  
Monte Carlo ◽  
Cross Sections ◽  
Event Shape ◽  
Leading Order ◽  
Centre Of Mass ◽  
Mass Energy ◽  
Perturbative Quantum Chromodynamics ◽  
Perturbative Quantum ◽  
Jet Shapes ◽  
Jet Cross Sections

During the first years of the LHC operation a large amount of jet data was recorded by the ATLAS and CMS experiments. In this review several measurements of jet-related observables are presented, such as multi-jet rates and cross sections, ratios of jet cross sections, jet shapes and event shape observables. All results presented here are based on jet data collected at a centre-of-mass energy of 7 TeV. Data are compared to various Monte Carlo generators, as well as to theoretical next-to-leading-order calculations allowing a test of perturbative Quantum Chromodynamics in a previously unexplored energy region.

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