Behavior of the effective QCD coupling ατ(s) at low scales -: art. no. 055008

被引：82

作者：

Brodsky, SJ ^{[1
]}

Menke, S

Merino, C

Rathsman, J

机构：

[1] Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA

[2] Uppsala Univ, S-75121 Uppsala, Sweden

来源：

PHYSICAL REVIEW D | 2003年 / 67卷 / 05期

关键词：

D O I：

10.1103/PhysRevD.67.055008

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The hadronic decays of the tau lepton can be used to determine the effective charge alpha(tau)(m(tau)('2)) for a hypothetical tau lepton with a mass in the range 0<m(tau)'<m(tau). This definition provides a fundamental definition of the QCD coupling at low mass scales. We study the behavior of alpha(tau) at low mass scales directly from first principles and without any renormalization-scheme dependence by looking at the experimental data from the OPAL Collaboration. The results are consistent with the freezing of the physical coupling at mass scales s = m(tau')(2) of order 1 GeV2 with a magnitude alpha(tau)similar to0.9+/-0.1.

引用

页数：9

共 69 条

[1] Measurement of the strong coupling constant αs and the vector and axial-vector spectral functions in hadronic tau decays [J].

Ackerstaff, K ;

Alexander, G ;

Allison, J ;

Altekamp, N ;

Anderson, KJ ;

Anderson, S ;

Arcelli, S ;

Asai, S ;

Ashby, SF ;

Axen, D ;

Azuelos, G ;

Ball, AH ;

Barberio, E ;

Barlow, RJ ;

Bartoldus, R ;

Batley, JR ;

Baumann, S ;

Bechtluft, J ;

Behnke, T ;

Bell, KW ;

Bella, G ;

Bentvelsen, S ;

Bethke, S ;

Betts, S ;

Biebel, O ;

Biguzzi, A ;

Bird, SD ;

Blobel, V ;

Bloodworth, IJ ;

Bobinski, M ;

Bock, P ;

Böhme, J ;

Boutemeur, M ;

Braibant, S ;

Bright-Thomas, P ;

Brown, RM ;

Burckhart, HJ ;

Burgard, C ;

Bürgin, R ;

Capiluppi, P ;

Carnegie, RK ;

Carter, AA ;

Carter, JR ;

Chang, CY ;

Charlton, DG ;

Chrisman, D ;

Ciocca, C ;

Clarke, PEL ;

Clay, E ;

Cohen, I .

EUROPEAN PHYSICAL JOURNAL C, 1999, 7 (04) :571-593

[2] STATIC LIMIT OF QUANTUM CHROMODYNAMICS [J].

APPELQUIST, T ;

DINE, M ;

MUZINICH, IJ .

PHYSICAL REVIEW D, 1978, 17 (08) :2074-2081

[3] RESUMMATION OF (BETA-0-ALPHA(S))(N) CORRECTIONS IN QCD - TECHNIQUES AND APPLICATIONS TO THE TAU-HADRONIC WIDTH AND THE HEAVY-QUARK POLE MASS [J].

BALL, P ;

BENEKE, M ;

BRAUN, VM .

NUCLEAR PHYSICS B, 1995, 452 (03) :563-625

[4] Measurement of the axial-vector τ spectral functions and determination of αs(Mτ2) from hadronic τ decays [J].

Barate, R ;

Buskulic, D ;

Decamp, D ;

Ghez, P ;

Goy, C ;

Lees, JP ;

Lucotte, A ;

Merle, E ;

Minard, MN ;

Nief, JY ;

Pietrzyk, B ;

Alemany, R ;

Boix, G ;

Casado, MP ;

Chmeissani, M ;

Crespo, JM ;

Delfino, M ;

Fernandez, E ;

Fernandez-Bosman, M ;

Garrido, L ;

Grauges, E ;

Juste, A ;

Martinez, M ;

Merino, G ;

Miquel, R ;

Mir, LM ;

Park, IC ;

Pascual, A ;

Perlas, JA ;

Riu, I ;

Sanchez, F ;

Colaleo, A ;

Creanza, D ;

de Palma, M ;

Gelao, G ;

Iaselli, G ;

Maggi, G ;

Maggi, M ;

Nuzzo, S ;

Ranieri, A ;

Raso, G ;

Ruggieri, F ;

Selvaggi, G ;

Silvestris, L ;

Tempesta, P ;

Tricomi, A ;

Zito, G ;

Huang, X ;

Lin, J ;

Ouyang, Q .

EUROPEAN PHYSICAL JOURNAL C, 1998, 4 (03) :409-431

[5] Particles and field .1. Review of particle physics [J].

Barnett, RM ;

Carone, CD ;

Groom, DE ;

Trippe, TG ;

Wohl, CG ;

Armstrong, B ;

Gee, PS ;

Wagman, GS ;

James, F ;

Mangano, M ;

Monig, K ;

Montanet, L ;

Feng, JL ;

Murayama, H ;

Hernandez, JJ ;

Manohar, A ;

AguilarBenitez, M ;

Caso, C ;

Crawford, RL ;

Roos, M ;

Tornqvist, NA ;

Hayes, KG ;

Hagiwara, K ;

Nakamura, K ;

Tanabashi, M ;

Olive, K ;

Honscheid, K ;

Burchat, PR ;

Shrock, RE ;

Eidelman, S ;

Schindler, RH ;

Gurtu, A ;

Hikasa, K ;

Conforto, G ;

Workman, RL ;

Grab, C ;

Amsler, C .

PHYSICAL REVIEW D, 1996, 54 (01) :1-+

[6] Renormalons [J].

Beneke, M .

PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS, 1999, 317 (1-2) :1-142

[7] NAIVE NONABELIANIZATION AND RESUMMATION OF FERMION BUBBLE CHAINS [J].

BENEKE, M ;

BRAUN, VM .

PHYSICS LETTERS B, 1995, 348 (3-4) :513-520

[8]

BINOSI D, HEPPH0209016

[9]

Bjorken J D, 1964, Relativistic quantum mechanics and relativistic quantum fields

[10] QCD ANALYSIS OF THE TAU-HADRONIC WIDTH [J].

BRAATEN, E ;

NARISON, S ;

PICH, A .

NUCLEAR PHYSICS B, 1992, 373 (03) :581-612

← 1 2 3 4 5 6 7 →