共查询到20条相似文献,搜索用时 703 毫秒
1.
P. C. M. Yock 《International Journal of Theoretical Physics》2006,45(6):1040-1047
Occam’s razor and recent data from CERN on photon-photon interactions favour a highly charged rival to the Standard Model. Either of two recently proposed linear colliders could make decisive tests. 相似文献
2.
The formalism for a new generation of unquenched quark models for baryons in which the effects of quark?Cantiquark pairs are taken into account in an explicit form via a microscopic, QCD-inspired, quark?Cantiquark creation mechanism, is presented. As an application the quark?Cantiquark contribution to the spin of the proton and the ??+ is discussed. Finally the strangeness radius of the ??+ in the closure limit is calculated. 相似文献
3.
Abachi S Abbott B Abolins M Acharya BS Adam I Adams DL Adams M Ahn S Aihara H Alitti J Álvarez G Alves GA Amidi E Amos N Anderson EW Aronson SH Astur R Avery RE Balamurali V Balderston J Baldin B Bantly J Bartlett JF Bazizi K Bendich J Beri SB Bertram I Bezzubov VA Bhat PC Bhatnagar V Bhattacharjee M Bischoff A Biswas N Blazey G Blessing S Boehnlein A Bojko NI Borcherding F Borders J Boswell C Brandt A Brock R Bross A Buchholz D Burtovoi VS Butler JM Casey D Castilla-Valdez H Chakraborty D 《Physical review letters》1995,74(14):2632-2637
4.
In this paper we present a method which may be used to get the nuclear effect functions RυA(xt) and RsA(xt) for valence quark distributions and sea quark distributions in the light of the data of 1-A deep inelastic scattering and nuclear Drell-Yan process. Both the functions may be used to test the theoretical models explaining the nuclear effects. With nuclei Fe, Ca and C as examples, the results are shown. 相似文献
5.
Using renormalization group and field equation techniques and several smoothness assumptions, we argue the effective charge in an ultraviolet free SU(N) color gauge theory becomes infinite in the infrared limit if the number of quark flavors exceeds . 相似文献
6.
S. R. Maity S. N. Das S. K. Sarkar 《International Journal of Theoretical Physics》1983,22(10):895-898
Because of the observed similarity between leptons and quarks, any lepton mass formula can be applied with proper modification to estimate the quark masses. In this work such an application of Rosen's (1978) lepton mass formula is attempted. 相似文献
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We review the current information about the eigenvalues of the quark mass matrix. The theoretical problems involved in a determination of the running masses mu, md, ms, mc and mb from experiment are discussed with the aim of getting reliable numerical values equipped with error bars that represent a conservative estimate of remaining uncertainties. 相似文献
9.
A. Manohar 《The European Physical Journal C - Particles and Fields》2000,15(1-4):377-384
10.
H. Kleinert 《Physics letters. [Part B]》1976,62(1):77-80
In quark gluon theory with very small bare masses, -ψ, spontaneous breakdown of chiral symmetry generates sizable masses Mu, Md, Ms, … We find (. Scalar densities have well determined non-zero vaccum expectations at an SU(3) breaking of the vacuum c′ ≡ 〈0|u8|〉/〈0|uo|0〉 ≈ ? 16% 相似文献
11.
In a development of the hypothesis of quark regions within massive stars, it is shown that superconductivity may arise in these stars. An analysis is made of the properties of quark atoms.Translated from Izvestiya VUZ. Fizika, No. 8, pp. 39–44, August, 1970. 相似文献
12.
在夸克质量密度相关模型处理奇异夸克物质滴时 ,会发现其半径随温度增加而变小 .为克服这一困难 ,我们通过使口袋常数 B温度参数化 ,引入了夸克质量密度温度相关模型 .在这一模型中 ,B=B0 [1 - a(T/Tc) +b(T/Tc) 2 ],文章中讨论了参数 a,b的取法. It is found that the radius for a stable strangelet is a decreasing function of temperature in quark mass density- dependent model. To overcome this difficulty, we extend this model to quark mass density- and temperature- dependent model in which the vacuum energy density at zero baryon density limit B depends on temperature. An ansatz B=B 0[1-a(T/T c )+b(T/T c ) 2] is introduced and the regions for the best choice of the parameters are studied. 相似文献
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14.
Kari Enqvist 《International Journal of Theoretical Physics》1980,19(10):713-724
We propose a physical interpretation of the second level of the combinatorial hierarchy in terms of three quarks, three antiquarks, and the vacuum. This interpretation allows us to introduce a new quantum number, which measures electromagnetic mass splitting of the quarks. We extend our argument by analog to baryons, and find someSU(3) and some new mass formulas for baryons. The generalization of our approach to other hierarchy levels is discussed. We present also an empirical mass formula for baryons, which seems to be loosely connected with the combinatorial hierarchy. 相似文献
15.
The chiral extension of the minimal standard model makes quarks with two chiralities present parallelly. Some interesting questions, such as the possibility of that the leptons are made of additional leptonic quarks and the proton decay are discussed. 相似文献
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17.
We study higher dimensional homogeneous cosmological model in the presence of quark and strange quark matter. The dynamical
behavior of the model for the strange quark matter equation of state of the form
p = \frac13 (r- 4 Bc)p= \frac{1}{3} (\rho- 4 B_{c}) are studied. 相似文献
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Recent trends in the research of quark gluon plasma (QGP) are surveyed and the current experimental and theoretical status
regarding the properties and signals of QGP is reported. We hope that the experiments commencing at relativistic heavy-ion
collider (RHIC) in 2000 will provide a glimpse of the QGP formation. 相似文献