Intrinsic light and strange quark--antiquark pairs in the proton and nonperturbative strangeness suppression
| Autor: | Chun-Sheng An, B. Saghai |
|---|---|
| Přispěvatelé: | Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Institut de Recherches sur les lois Fondamentales de l'Univers ( IRFU ), Commissariat à l'énergie atomique et aux énergies alternatives ( CEA ) -Université Paris-Saclay |
| Rok vydání: | 2017 |
| Předmět: |
Particle physics
Strange quark Overline High Energy Physics::Lattice Nuclear Theory strangeness: suppression Constituent quark FOS: Physical sciences quark antiquark Strangeness nonperturbative 01 natural sciences Fock space Nuclear physics p: target pi: electroproduction Pion quark model: chiral High Energy Physics - Phenomenology (hep-ph) quark: constituent 0103 physical sciences 010306 general physics K: electroproduction numerical calculations Nuclear Experiment Physics Mathematics::Complex Variables 010308 nuclear & particles physics High Energy Physics::Phenomenology Formalism (philosophy of mathematics) High Energy Physics - Phenomenology [PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph] [ PHYS.HPHE ] Physics [physics]/High Energy Physics - Phenomenology [hep-ph] High Energy Physics::Experiment |
| Zdroj: | Phys.Rev.D Phys.Rev.D, 2017, 95 (7), pp.074015. ⟨10.1103/PhysRevD.95.074015⟩ Physical Review D Physical Review D, American Physical Society, 2017, 95 (7), pp.074015. ⟨10.1103/PhysRevD.95.074015⟩ Phys.Rev.D, 2017, 95 (7), pp.074015. 〈10.1103/PhysRevD.95.074015〉 |
| ISSN: | 1550-7998 1550-2368 |
| DOI: | 10.48550/arxiv.1704.00935 |
| Popis: | The CLAS Collaboration recently reported measured ratios of pion and kaon electroproduction cross sections from a proton target and extracted the ratios for light and strange quark--antiquark pairs, ${u\bar{u}}/ {d\bar{d}}$ and ${s\bar{s}}/ {d\bar{d}}$. Within an extended chiral constituent quark formalism, we investigate contributions to those ratios from the nonperturbative mechanism due to all possible intrinsic $|uudQ \bar{Q}\rangle$ Fock states in the proton; with $Q \bar{Q} \equiv u\bar{u},~ d\bar{d},~s\bar{s},~c\bar{c}$. Our results are compared with the CLAS data and findings from other phenomenological approaches, offering insights into the manifestations of the genuine five--quark Fock states in the proton and its relevance to interpreting the experimental data. Comment: To appear in Phys. Rev. D |
| Databáze: | OpenAIRE |
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