New insights into hadron production mechanism from 
<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mi>p</mml:mi><mml:mi>T</mml:mi></mml:msub></mml:math>
 spectra in 
<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>p</mml:mi><mml:mi>p</mml:mi></mml:math>
 collisions at 
<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msqrt><mml:mi>s</mml:mi></mml:msqrt><mml:mo>=</mml:mo><mml:mn>7</mml:mn><mml:mtext> </

Gou, X.; Shao, Feng-lan; Wang, Ruiqin; Li, Haihong

doi:10.1103/physrevd.96.094010

Cited by 22 publications

(39 citation statements)

References 63 publications

(181 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The p T distributions of quarks at hadronization are inputs of the model. We have obtained the p T spectra of light-flavor constituent quarks in the previous work [21]. The averaged quark numbers in the rapidity interval |y| < 0.5 are 2.5 for the u quark and 0.8 for the s quark, respectively.…”

Section: Resultsmentioning

confidence: 99%

“…We emphasize the following aspects to address the physical importance of our results: (1) The property, i.e., the p T distributions, of light-flavor constituent quarks and antiquarks at hadronization is obtained from the data of p T spectra of light-flavor hadrons in work [21] where it is found that equal-velocity combination of light-flavor quarks can reasonably describe the data of light-flavor hadrons in the low p T range. The existence of the underlying source of light-flavor quarks is a new property of small parton system, maybe related to the creation of the deconfined parton system in pp collisions at LHC energies.…”

Section: Summary and Discussionmentioning

confidence: 99%

“…For light-flavor quarks, we take m u = m d = 0.33 GeV and m s = 0.5 GeV, so that the data of momentum spectra of light-flavor hadrons are well explained [21,34]. The constituent mass of the charm quark is taken to have the usual value m c = 1.5 GeV.…”

Section: Formulas In Momentum Spacementioning

confidence: 99%

“…Following our earlier work [21,34] for light-flavor hadrons in pp and p-Pb collisions at LHC energies, we adopt the co-moving approximation in combination, i.e., the charm quark combines with light quark(s) of the same velocity to form the charm hadron. Since the equal velocity implies p i = γ vm i ∝ m i , the momentum fraction is…”

Section: Formulas In Momentum Spacementioning

confidence: 99%

“…In recent work [21], we found that the mid-rapidity data of p T spectra of light-flavor hadrons in the low p T range ( p T 6 GeV/c) in pp collisions at √ s = 7 TeV can be well understood by a phenomenological quark combination mechanism using the equal-velocity combination of up/down and strange quarks and antiquarks with constituent masses at hadronization. This suggests that the constituent quark degrees of freedom (CQdof) play an important role in low p T hadron production in pp collisions at LHC energies, which indicates the possible existence of the underlying source with soft CQdof, a kind of new property for the small parton system created in pp collisions at LHC energies.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

New feature of low $$p_{T}$$ p T charm quark hadronization in pp collisions at $$\sqrt{s}=7$$

Shao

2018

Eur. Phys. J. C

Self Cite

View full text Add to dashboard Cite

Treating the light-flavor constituent quarks and antiquarks whose momentum information is extracted from the data of soft light-flavor hadrons in pp collisions at √ s = 7 TeV as the underlying source of chromatically neutralizing the charm quarks of low transverse momenta ( p T ), we show that the experimental data of p T spectra of single-charm hadronsTeV can be well understood by the equal-velocity combination of perturbatively created charm quarks and those light-flavor constituent quarks and antiquarks. This suggests a possible new scenario of low p T charm quark hadronization, in contrast to the traditional fragmentation mechanism, in pp collisions at LHC energies. This is also another support for the exhibition of the soft constituent quark degrees of freedom for the small parton system created in pp collisions at LHC energies.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Summary and Discussionmentioning

confidence: 99%

Section: Formulas In Momentum Spacementioning

confidence: 99%

Section: Formulas In Momentum Spacementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

New feature of low $$p_{T}$$ p T charm quark hadronization in pp collisions at $$\sqrt{s}=7$$

Shao

2018

Eur. Phys. J. C

Self Cite

View full text Add to dashboard Cite

show abstract

Measurement of the production cross section of prompt $$ {\Xi}_{\mathrm{c}}^0 $$ baryons at midrapidity in pp collisions at $$ \sqrt{s} $$ = 5.02 TeV

Acharya

Adamová²,

Adler³

et al. 2021

J. High Energ. Phys.

View full text Add to dashboard Cite

The transverse momentum (pT) differential cross section of the charm-strange baryon $$ {\Xi}_{\mathrm{c}}^0 $$ Ξ c 0 is measured at midrapidity (|y| < 0.5) via its semileptonic decay into e+Ξ−νe in pp collisions at $$ \sqrt{s} $$ s = 5.02 TeV with the ALICE detector at the LHC. The ratio of the pT-differential $$ {\Xi}_{\mathrm{c}}^0 $$ Ξ c 0 -baryon and D0-meson production cross sections is also reported. The measurements are compared with simulations with different tunes of the PYTHIA 8 event generator, with predictions from a statistical hadronisation model (SHM) with a largely augmented set of charm-baryon states beyond the current lists of the Particle Data Group, and with models including hadronisation via quark coalescence. The pT-integrated cross section of prompt $$ {\Xi}_{\mathrm{c}}^0 $$ Ξ c 0 -baryon production at midrapidity is also reported, which is used to calculate the baryon-to-meson ratio $$ {\Xi}_{\mathrm{c}}^0 $$ Ξ c 0 /D0 = 0.20 ± 0.04 $$ {\left(\mathrm{stat}.\right)}_{-0.07}^{+0.08} $$ stat . − 0.07 + 0.08 (syst.). These results provide an additional indication of a modification of the charm fragmentation from e+e− and e−p collisions to pp collisions.

show abstract

Different production sources of light nuclei inultra-relativistic heavy-ion collisions

Wang

Shao

2019

Chinese Phys. C

Self Cite

View full text Add to dashboard Cite

We propose a new method, i.e., an exclusive quark combination model + an inclusive hadron recombination model, to study different production sources of light nuclei in relativistic heavy-ion collisions. We take deuterons and 3 He produced in Pb-Pb collisions at √ s NN = 2.76 TeV as examples to present contributions of different production sources by studying their rapidity densities dN/dy, yield ratios and transverse momentum (p T ) spectra just after the hadronization as well as at the final kinetic freeze-out. We find that: only very small fractions of d and 3 He are created just after the hadronization; nucleons from ∆ resonance decays make a much larger contribution to the regeneration of light nuclei at the hadronic phase stage, and this contribution takes about 79% and 92% for d and 3 He, respectively, observed at the final kinetic freeze-out. We also find that yield ratios d/p, 3 He/p and 3 He/d are good observables to probe contributions for light nuclei from different production sources, and provide a natural explanation for constant values of d/p and 3 He/p as a function of the averaged charged multiplicity measured by the ALICE Collaboration. PACS numbers: 25.75.Ag, 25.75.Dw, 25.75.-q I. INTRODUCTIONThe production of light nuclei in relativistic heavy-ion collisions is of importance for many issues in nuclear physics and particle physics. It not only can help to understand the mechanism of cluster formation in the interior of the fireball of a heavy-ion collision but also can serve as an effective probe of the fireball freeze-out properties [1][2][3][4][5]. Experimental measurements of light nuclei have been extensively executed at the Relativistic Heavy Ion Collider (RHIC) [6-10], at relatively low-energy collisions such as those obtained by the NA49 Collaboration at the Super Proton Synchrotron (SPS) [11][12][13][14][15], and more recently at the very high energy reactions at the Large Hadron Collider (LHC) [16][17][18][19]. An interesting phenomenon observed at LHC is that the ratio d/p in Pb-Pb collisions is larger by a factor of about 2.2 than that in pp collisions while ratios of identified hadrons such as p/π and Λ/K 0 S , etc., do not show significant differences between Pb-Pb and pp collisions [16,20]. Up to now, there is no satisfied understanding for such phenomenon.Presently, there are two kinds of production mechanisms used to describe light nucleus formation in theory. One is the thermal model [21][22][23] and the other is the recombination/coalescence model [24][25][26][27][28][29][30][31]. In the recombination/coalescence model, light nuclei can be formed by coalescence of nucleons produced just after the hadronization and/or those from resonance decays. Since the binding energies of light nuclei are very small (∼ a few MeV), final-state coalescence, i.e., nucleons recombining into light nuclei at a final stage of the hadronic phase evolution (at the final kinetic freeze-out), is commonly adopted in different recombination/coalescence models [28][29][30][31]. In fact, light nuclei can b...

show abstract

New insights into hadron production mechanism from pT spectra in pp collisions at s=7

Cited by 22 publications

References 63 publications

New feature of low $$p_{T}$$ p T charm quark hadronization in pp collisions at $$\sqrt{s}=7$$

New feature of low $$p_{T}$$ p T charm quark hadronization in pp collisions at $$\sqrt{s}=7$$

Measurement of the production cross section of prompt $$ {\Xi}_{\mathrm{c}}^0 $$ baryons at midrapidity in pp collisions at $$ \sqrt{s} $$ = 5.02 TeV

Different production sources of light nuclei inultra-relativistic heavy-ion collisions

Contact Info

Product

Resources

About