Electroweak data and the Higgs boson mass: A case for new physics

被引:78
作者
Chanowitz, MS [1 ]
机构
[1] Univ Calif Berkeley, Ernest Orlando Lawrence Berkeley Natl Lab, Theoret Phys Grp, Berkeley, CA 94720 USA
关键词
D O I
10.1103/PhysRevD.66.073002
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
Because of two 3sigma anomalies, the standard model (SM) fit of the precision electroweak data has a poor confidence level, C.L.=0.010. Since both anomalies involve challenging systematic issues, it might appear that the SM could still be valid if the anomalies resulted from underestimated systematic error. Indeed the C.L. of the global fit could then increase to 0.65, but that fit predicts a small Higgs boson mass, m(H)=43 GeV, that is only consistent at C.L.=0.035 with the lower limit, m(H)>114 GeV, established by direct searches. The data then favor new physics whether the anomalous measurements are excluded from the fit or not, and the Higgs boson mass cannot be predicted until the new physics is understood. Some measure of statistical fluctuation would be needed to maintain the validity of the SM, which is unlikely by broad statistical measures. New physics is favored, but the SM is not definitively excluded.
引用
收藏
页数:15
相关论文
共 56 条
[1]   A consistent model of electroweak data including Z->b(b)over-bar and Z->c(c)over-bar [J].
Agashe, K ;
Graesser, M ;
Hinchliffe, I ;
Suzuki, M .
PHYSICS LETTERS B, 1996, 385 (1-4) :218-224
[2]   R(b), R(c) and jet distributions at the Tevatron in a model with an extra vector boson [J].
Altarelli, G ;
DiBartolomeo, N ;
Feruglio, F ;
Gatto, R ;
Mangano, ML .
PHYSICS LETTERS B, 1996, 375 (1-4) :292-300
[3]  
Altarelli G, 2001, J HIGH ENERGY PHYS
[4]  
[Anonymous], PHYS REV D
[5]  
AZIZ T, 2001, CERNOPEN2001067
[6]   Leptophobic U(1)'s and the R(b)-R(c) anomalies [J].
Babu, KS ;
Kolda, C ;
MarchRussell, J .
PHYSICAL REVIEW D, 1996, 54 (07) :4635-4647
[7]   CERN LHC analysis of the strongly interacting WW system: Gold-plated modes [J].
Bagger, J ;
Barger, V ;
Cheung, K ;
Gunion, J ;
Han, T ;
Ladinsky, GA ;
Rosenfeld, R ;
Yuan, CP .
PHYSICAL REVIEW D, 1995, 52 (07) :3878-3889
[8]   Precision observables and electroweak theories [J].
Bagger, JA ;
Falk, AF ;
Swartz, M .
PHYSICAL REVIEW LETTERS, 2000, 84 (07) :1385-1388
[9]   ZFITTER v.6.21:: A semi-analytical program for fermion pair production in e+e- annihilation [J].
Bardin, D ;
Bilenky, M ;
Christova, P ;
Jack, M ;
Kalinovskaya, L ;
Olchevski, A ;
Riemann, S ;
Riemann, T .
COMPUTER PHYSICS COMMUNICATIONS, 2001, 133 (2-3) :229-395
[10]   REGULARIZATION DEPENDENCE OF THE LATTICE HIGGS-BOSON MASS BOUND [J].
BHANOT, G ;
BITAR, K .
PHYSICAL REVIEW LETTERS, 1988, 61 (07) :798-801