Transverse Energy and Cone Size Dependence of the Inclusive Jet Cross-Section at a Center-of-Mass Energy of 1.8-TeV

AbstractThe inclusive hadroproduction of two heavy quarks, featuring a large separation in rapidity, is proposed as a novel probe channel of the Balitsky–Fadin–Kuraev–Lipatov (BFKL) approach. In a theoretical setup which includes full resummation of leading logarithms in the center-of-mass energy and partial resummation of the next-to-leading ones, predictions for the cross section and azimuthal coefficients are presented for kinematic configurations typical of current and possible future experimental analyses at the LHC.

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Study of the process $$e^+e^- \rightarrow \eta \pi ^0\gamma $$ in the energy range $$\sqrt{s} = {1.05-2.00}$$ GeV with the SND detector

The European Physical Journal C ◽

10.1140/epjc/s10052-020-08556-w ◽

2020 ◽

Vol 80 (11) ◽

Author(s):

M. N. Achasov ◽

A. Yu. Barnyakov ◽

A. A. Baykov ◽

K. I. Beloborodov ◽

A. V. Berdyugin ◽

...

Keyword(s):

Energy Range ◽

Cross Section ◽

Center Of Mass ◽

Wide Energy Range ◽

Mass Energy ◽

Center Of Mass Energy ◽

Wide Energy ◽

Radiation Processes ◽

Using Data ◽

First Time

AbstractThe process $$e^+e^-\rightarrow \eta \pi ^0\gamma $$ e + e - → η π 0 γ is studied in the center-of-mass energy range 1.05–2.00 GeV using data with an integrated luminosity of 94.5 $$\hbox {pb}^{-1}$$ pb - 1 collected by the SND detector at the VEPP-2000 $$e^{+}e^{-}$$ e + e - collider. The $$e^+e^-\rightarrow \eta \pi ^0\gamma $$ e + e - → η π 0 γ cross section is measured for the first time. It is shown that the dominant mechanism of this reaction is the transition through the $$\omega \eta $$ ω η intermediate state. The measured cross section of the subprocess $$e^+e^-\rightarrow \omega \eta \rightarrow \eta \pi ^0\gamma $$ e + e - → ω η → η π 0 γ is consistent with previous measurements in the $$e^+e^-\rightarrow \pi ^+\pi ^-\pi ^0\eta $$ e + e - → π + π - π 0 η mode. It is found, with a significance of $$5.6\sigma $$ 5.6 σ , that the process $$e^+e^-\rightarrow \eta \pi ^0\gamma $$ e + e - → η π 0 γ is not completely described by hadronic vector-pseudoscalar intermediate states. The cross section of this missing contribution, which can originate from radiation processes, e. g. $$e^+e^-\rightarrow a_{0}(1450)\gamma $$ e + e - → a 0 ( 1450 ) γ , is measured. It is found to be 15–20 pb in the wide energy range from 1.3 to 1.9 GeV.

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Higher-order differential cross section calculation for the associated production ofa W boson and jets in the electron decay channel at a center-of-mass energy of 13TeV in proton-proton collisions

TURKISH JOURNAL OF PHYSICS ◽

10.3906/fiz-1809-12 ◽

2019 ◽

Vol 43 (2) ◽

pp. 156-166

Author(s):

Kadir ÖCALAN

Keyword(s):

Cross Section ◽

W Boson ◽

Decay Channel ◽

Center Of Mass ◽

Mass Energy ◽

Proton Proton ◽

Proton Collisions ◽

Center Of Mass Energy ◽

Associated Production ◽

Proton Proton Collisions

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Extracting the QCD ΛMS¯ parameter in Drell–Yan process using Collins–Soper–Sterman approach

Modern Physics Letters A ◽

10.1142/s0217732317500407 ◽

2017 ◽

Vol 32 (10) ◽

pp. 1750040 ◽

Cited By ~ 1

Author(s):

R. Taghavi ◽

A. Mirjalili

Keyword(s):

Experimental Data ◽

Transverse Momentum ◽

Cross Section ◽

Center Of Mass ◽

Distribution Functions ◽

Mass Energy ◽

Transverse Momentum Dependent ◽

Center Of Mass Energy ◽

Dimensional Transmutation ◽

High Center

In this work, we directly fit the QCD dimensional transmutation parameter, [Formula: see text], to experimental data of Drell–Yan (DY) observables. For this purpose, we first obtain the evolution of transverse momentum dependent parton distribution functions (TMDPDFs) up to the next-to-next-to-leading logarithm (NNLL) approximation based on Collins–Soper–Sterman (CSS) formalism. As is expecting the TMDPDFs are appearing at larger values of transverse momentum by increasing the energy scales and also the order of approximation. Then we calculate the cross-section related to the TMDPDFs in the DY process. As a consequence of global fitting to the five sets of experimental data at different low center-of-mass energies and one set at high center-of-mass energy, using CETQ06 parametrizations as our boundary condition, we obtain [Formula: see text] MeV corresponding to the renormalized coupling constant [Formula: see text] which is within the acceptable range for this quantity. The goodness of [Formula: see text] shows the results for DY cross-section are in good agreement with different experimental sets, containing E288, E605 and R209 at low center-of-mass energies and [Formula: see text], CDF data at high center-of-mass energy. The repeated calculations, using HERAPDFs parametrizations is yielding us numerical values for fitted parameters very close to what we obtain using CETQ06 PDFs set. This indicates that the obtained results have enough stability by variations in the boundary conditions.

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