Renormalization of quark propagators from twisted-mass lattice qcd at n-f=2
文献类型：期刊论文
| 作者 | Blossier, B.1,2; Boucaud, Ph.1,2; Brinet, M.3; De Soto, F.4; Liu, Z.5,6; Morenas, V.7; Pene, O.1,2; Petrov, K.1,2; Rodriguez-Quintero, J.8 |
| 刊名 | Physical review d
 |
| 出版日期 | 2011-04-20 |
| 卷号 | 83期号:7页码:22 |
| ISSN号 | 1550-7998 |
| DOI | 10.1103/physrevd.83.074506 |
| 通讯作者 | Blossier, b.() |
| 英文摘要 | We present results concerning the nonperturbative evaluation of the renormalization constant for the quark field, z(q), from lattice simulations with twisted-mass quarks and three values of the lattice spacing. we use the regularization-invariant momentum-subtraction (ri'-mom) scheme. z(q) has very large lattice spacing artefacts; it is considered here as a test bed to elaborate accurate methods which will be used for other renormalization constants. we recall and develop the nonperturbative correction methods and propose tools to test the quality of the correction. these tests are also applied to the perturbative correction method. we check that the lattice-spacing artefacts indeed scale as a(2)p(2). we then study the running of z(q) with particular attention to the nonperturbative effects, presumably dominated by the dimension-two gluon condensate < a(2)> in landau gauge. we show indeed that this effect is present, and not small. we check its scaling in physical units, confirming that it is a continuum effect. it gives a similar to 4% contribution at 2 gev. different variants are used in order to test the reliability of our result and estimate the systematic uncertainties. finally, combining all our results and using the known wilson coefficient of < a(2)>, we find g(2)(mu(2))< a(2)>(mu 2cm) = 2.01(11)(+0.61-0.73)gev2 at mu = 10 gev, the local operator a(2) being renormalized in the (ms) over bar scheme. this last result is in fair agreement within uncertainties with the value independently extracted from the strong coupling constant. we convert the nonperturbative part of z(q) from the regularization-invariant momentum-subtraction (ri'-mom) scheme to (ms) over bar. our result for the quark field renormalization constant in the (ms) over bar scheme is z(q)((ms) over bar pert) ((2gev)(2); g(bare)(2)) = 0.750(3)(7) - 0.313(20)(g(bare)(2) - 1.5) for the perturbative contribution and z(q)((ms) over bar nonperturbative) ((2gev)(2); g(bare)(2)) 0.781(6)(21) - 0.313(20)(g(bare)(2) - 1.5) when the nonperturbative contribution is included. |
| WOS关键词 | COMPOSITE OPERATOR ; LIGHT QUARKS ; DIMENSION-2 ; CONDENSATE ; INVARIANT ; FERMIONS |
| WOS研究方向 | Astronomy & Astrophysics ; Physics |
| WOS类目 | Astronomy & Astrophysics ; Physics, Particles & Fields |
| 语种 | 英语 |
| WOS记录号 | WOS:000290109600001 |
| 出版者 | AMER PHYSICAL SOC |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2176097 |
| 专题 | 高能物理研究所 |
| 通讯作者 | Blossier, B. |
| 作者单位 | 1.CNRS, Phys Theor Lab, Unite Mixte Rech 8627, F-91405 Orsay, France 2.Univ Paris 11, F-91405 Orsay, France 3.UJF, IN2P3, CNRS, Lab Phys Subatom & Cosmol, F-38026 Grenoble, France 4.Univ Pablo Olavide, Dept Sistemas Fis Quim & Nat, Seville 41013, Spain 5.Univ Cambridge, DAMTP, Cambridge CB3 0WA, England 6.Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China 7.Univ Clermont Ferrand, Phys Corpusculaire Lab, CNRS, IN2P3, F-63177 Aubiere, France 8.Univ Huelva, Fac Ciencias Expt, Dept Fis Aplicada, Huelva 21071, Spain |
| 推荐引用方式 GB/T 7714 | Blossier, B.,Boucaud, Ph.,Brinet, M.,et al. Renormalization of quark propagators from twisted-mass lattice qcd at n-f=2[J]. Physical review d,2011,83(7):22. |
| APA | Blossier, B..,Boucaud, Ph..,Brinet, M..,De Soto, F..,Liu, Z..,...&Rodriguez-Quintero, J..(2011).Renormalization of quark propagators from twisted-mass lattice qcd at n-f=2.Physical review d,83(7),22. |
| MLA | Blossier, B.,et al."Renormalization of quark propagators from twisted-mass lattice qcd at n-f=2".Physical review d 83.7(2011):22. |
入库方式： iSwitch采集
来源：高能物理研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。