The impact of Fermi motion on the heavy quarkonia fragmentation using the light-cone wave function

Nejad, S. Mohammad Moosavi

doi:10.1140/epjp/i2018-11862-x

Cited by 19 publications

(4 citation statements)

References 43 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Following Ref. [24], we adopt the infinite momentum frame where the distribution amplitude Φ B , with neglecting the Fermi motion of constituents, reads [54,55]…”

Section: Experimental Data and Fit Resultsmentioning

confidence: 99%

$Λ_c^+$ fragmentation functions from pQCD approach and the Suzuki model

Delpasand,

Nejad,

Soleymaninia

2020

Preprint

View full text Add to dashboard Cite

Through data analysis, we present new sets of nonperturbative fragmentation functions (FFs) for Λ + c baryon both at leading and next-to-leading order (NLO) and, for the first time, at next-to-nextto-leading order (NNLO) in the minimal subtraction factorization scheme with five massless quarks. The FFs are determined by fitting all available data of inclusive single Λ + c baryon production in e + e − annihilation taken by the OPAL Collaboration at CERN LEP1 and Belle Collaboration at KEKB. We also estimate the uncertainties in the Λ + c FFs as well as in the corresponding observables. In a completely different approach based on the Suzuki model, we will theoretically calculate the Λ + c FF from charm quark and present our result at leading order perturbative QCD framework. A comparison confirms a good consistency between both approaches. We will also apply the Λ + c FFs to make theoretical predictions for the energy distribution of Λ + c produced through the top quark decay, to be measured at the CERN LHC.

show abstract

“…Following Ref. [24], we adopt the infinite momentum frame where the distribution amplitude Φ B , with neglecting the Fermi motion of constituents, reads [54,55]…”

Section: Experimental Data and Fit Resultsmentioning

confidence: 99%

$Λ_c^+$ fragmentation functions from pQCD approach and the Suzuki model

Delpasand,

Nejad,

Soleymaninia

2020

Preprint

View full text Add to dashboard Cite

show abstract

“…Using the extracted FFs one can estimate the production rates of heavy pentaquarks in hadron colliders. More accurate results can be achieved considering other effects such as the Fermi motion of constituents [27], the pentaquark mass effect on the fragmentation variable, NLO radiative corrections, etc. However, containing some improvements such as the Fermi motion effect leads to very complicated integrals which should be solved numerically.…”

Section: Discussionmentioning

confidence: 99%

“…In [27,28], we have studied the effect of Fermi motion on the heavy mesons fragmentation function and showed that its effect can be simply ignored with a reasonable approximation.…”

Section: Heavy Pentaquark Fragmentationmentioning

confidence: 99%

S-wave heavy pentaquark production in direct fragmentation of heavy quark

Moosavi Nejad,

Farashahian

2023

Phys. Scr.

View full text Add to dashboard Cite

Study of exotic hadrons with configurations beyond the naive quark model has attracted a lot of interests in recent years. Due to their complicated configuration many theoretical models have been designed for describing their structure. Understanding the production mechanism of exotic hadrons could be helpful to find out their inner structure and to test the theory of QCD as well. It is well-known that the dominant production mechanism for conventional heavy hadrons with large transverse momentum is fragmentation so as this mechanism could also be extended to heavy pentaquarks production. This work is a first effort to study the direct fragmentation of heavy quarks into ground state heavy pentaquarks in leading order of perturbative QCD. Considering the picture of compact pentaquark states, through the Suzuki approach we will compute the fragmentation function of heavy quarks into S-wave heavy pentaquarks. The production cross section of heavy pentaquarks through pair annihilation will also be estimated at lowest order of perturbative QCD.

show abstract

“…The Hessian method can also be used to estimate the polarized PDFs and fragmentation functions [62][63][64][65][68][69][70][71].…”

Section: Technical Detail Of Qcd Analysismentioning

confidence: 99%

Improved determination of strange distribution function from the global analysis using BHPS model

Salajegheh,

Nejad,

Tehrani

2021

Preprint

View full text Add to dashboard Cite

We study the impact of intrinsic strange (IS) component of nucleon sea on the global analysis of parton distribution functions (PDFs) considering a wide range of experimental data. To this aim, we consider two scenarios on the basis of BHPS model results for the IS distribution. In the first scenario, we apply the results presented through the BHPS model and in the second scenario we use its evolved distributions. For each scenarios, we present the limit of the IS probability P ss 5 for the standard tolerance criteria ∆χ 2 = 1 and 18.112 at 1σ and 4σ levels. Our results show that the experimental data can tolerate an IS component with a greater probability P ss 5 if one employs the second scenario. We obtain P ss 5 ≈ 0.01 and P ss 5 ≈ 0.025 for ∆χ 2 = 1 and 18.112, respectively, at the 4σ level. We also calculate the ratio of strange-to-light sea-quark densities rs in the proton both including and excluding the IS component. Our results show that one can obtain a higher value for the ratio rs if the IS component is included.

show abstract

The impact of Fermi motion on the heavy quarkonia fragmentation using the light-cone wave function

Cited by 19 publications

References 43 publications

$Λ_c^+$ fragmentation functions from pQCD approach and the Suzuki model

$Λ_c^+$ fragmentation functions from pQCD approach and the Suzuki model

S-wave heavy pentaquark production in direct fragmentation of heavy quark

Improved determination of strange distribution function from the global analysis using BHPS model

Contact Info

Product

Resources

About