Zobrazeno 1 - 10 of 127 pro vyhledávání: '"B. Saghai"'
1
Orbital angular momentum of the proton and intrinsic five-quark Fock states
Autor: Chun-Sheng An, B. Saghai
Publikováno v: Phys.Rev.D
Phys.Rev.D, 2019, 99 (9), pp.094039. ⟨10.1103/PhysRevD.99.094039⟩
Physical Review
Physical Review D
Physical Review D, American Physical Society, 2019, 99 (9), pp.094039. ⟨10.1103/PhysRevD.99.094039⟩
The orbital angular momentum ($L_q$) of the proton is studied by employing the extended constituent quark model. Contributions from different flavors, namely, up, down, strange, and charm quarks in the proton are investigated. Probabilities of the in
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::967ace01987e8662d2f70af5f724f1dc
https://doi.org/10.1103/physrevd.99.094039
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2
Intrinsic light and strange quark--antiquark pairs in the proton and nonperturbative strangeness suppression
Autor: Chun-Sheng An, B. Saghai
Publikováno v: 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〉
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}
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3
Intrinsic charm content of the nucleon and charmness-nucleon sigma term
Autor: Shaorong Duan, B. Saghai, C. S. An
Publikováno v: Phys.Rev.D
Phys.Rev.D, 2016, 93 (11), pp.114006. ⟨10.1103/PhysRevD.93.114006⟩
Physical Review D
Physical Review D, American Physical Society, 2016, 93 (11), pp.114006. ⟨10.1103/PhysRevD.93.114006⟩
Phys.Rev.D, 2016, 93 (11), pp.114006. 〈10.1103/PhysRevD.93.114006〉
In the extended chiral constituent quark model, the intrinsic $c \bar{c}$ content of the nucleon is investigated. The probabilities of the quark-antiquark components in the nucleon wave functions are calculated by taking the nucleon to be admixtures
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1ff7bb0631aed2edf38f0df04c53213a
http://arxiv.org/abs/1606.02000
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4
Study of nucleon resonances in a chiral quark model via η productions
Autor: B. Saghai, Jun He
Publikováno v: Chinese Physics C. 33:1389-1392
In this report we investigate η-meson productions on the proton via electromagnetic and hadron probes in a chiral quark model approach. The observables, such as, differential cross section and beam asymmetry for the two productions are calculated an
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::caff75aba8dca6f62a5fa3d71081d04f
https://doi.org/10.1088/1674-1137/33/12/062
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5
Configuration Mixing of Quark States in Baryons
Autor: B. Saghai, Z. Li
Publikováno v: Few-Body Systems. 47:105-115
Mixing angles are used to describe the $SU(6)\otimes O(3)$ symmetry breaking in $\left[70,~1^-\right]$ multiplet in the sector of the lowest mass nucleon resonances, which are investigated extensively in constituent quark models for baryon spectrosco
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https://doi.org/10.1007/s00601-009-0071-2
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6
Pion- and strangeness-baryonσterms in the extended chiral constituent quark model
Autor: B. Saghai, Chun-Sheng An
Publikováno v: Physical Review D. 92
Within an extended chiral constituent quark formalism, we investigate contributions from all possible five-quark components in the octet baryons to the pion-baryon (${\ensuremath{\sigma}}_{\ensuremath{\pi}B}$) and strangeness-baryon (${\ensuremath{\s
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::d6b9a833a6a64f58ab6f2d6abaa003fb
https://doi.org/10.1103/physrevd.92.014002
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7
Coupled-channel study of γp→K+Λ
Autor: B. Saghai, T.-S. H. Lee, Wen-Tai Chiang, F. Tabakin
Publikováno v: Physics Letters B. 517(1-2):101-108
A coupled-channel (CC) approach has been developed to investigate kaon photoproduction on the nucleon. In addition to direct K+ Lambda production, our CC approach accounts for strangeness production including K+ Lambda final state interactions with b
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8
Non-diffractive mechanisms in the φ-meson photoproduction on nucleons
Autor: B. Saghai, Jim Al-Khalili, Qiang Zhao
Publikováno v: Physics Letters B. 509:231-238
We examine the non-diffractive mechanisms in the $\phi$ meson photoproduction from threshold up to a few GeV using an effective Lagrangian in a constituent quark model. The new data from CLAS at large angles can be consistently accounted for in terms
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::92b194b97bf71a571e01d4c1932509b6
https://doi.org/10.1016/s0370-2693(01)00432-4
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9
Photoproduction of a Λ on12C
Autor: B. Saghai, H. Toki, T.-S. H. Lee, Z.-Y. Ma
Publikováno v: Physical Review C. 58:1551-1557
The photoproduction of a {Lambda} on {sup 12}C is investigated by using the recently developed Saclay-Lyon amplitudes for the {gamma}p{r_arrow}K{sup +}{Lambda} reaction and the single-particle wave functions from a relativistic mean-field model of nu
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https://doi.org/10.1103/physrevc.58.1551
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10
Study of hyperon-nucleon interactions with d(e,e′K) reactions
Autor: B. Saghai, V. Stoks, T.-S. H. Lee, C. Fayard
Publikováno v: Nuclear Physics A. 639:247c-250c
The dependence of the d(e,e{prime}K{sup +}) reaction cross sections on the hyperon-nucleon interactions is investigated. It is shown that the data obtained with Longitudinal-Transverse separation or polarized photons can distinguish a class of Nijmeg
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https://doi.org/10.1016/s0375-9474(98)00280-2
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