Abstract
We consider the electroweak theory with an additional neutral vector boson Z′ at one loop. We propose a renormalization scheme which makes the decoupling of heavy Z′ effects manifest. The proposed scheme justifies the usual procedure of performing fits to the electroweak data by combining the full SM loop corrections to observables with the tree-level corrections due to the extended gauge structure. Using this scheme we discuss in the model with extra an U(1)′ group factor one-loop results for the ρ parameters defined in several different ways.
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N. Arkani-Hamed, A.G. Cohen, H. Georgi, Phys. Lett. B 513, 232 (2001) [arXiv:hep-ph/0105239]; N. Arkani-Hamed, A.G. Cohen, E. Katz, A.E. Nelson, T. Gregoire, J.G. Wacker, JHEP 0208, 021 (2002) [arXiv:hep-ph/0206020]; N. Arkani-Hamed, A.G. Cohen, E. Katz, A.E. Nelson, JHEP 0207, 034 (2002) [arXiv:hep-ph/0206021]; M. Schmaltz, JHEP 0408, 056 (2004) [arXiv:hep-ph/0407143]
A. Birkedal, Z. Chacko, M.K. Gaillard, JHEP 0410, 036 (2004) [arXiv:hep-ph/0404197]
P.H. Chankowski, A. Falkowski, S. Pokorski, J. Wagner, Phys. Lett. B 598, 252 (2004) [arXiv:hep-ph/0407242]
G. Marandella, C. Schappacher, A. Strumia, Phys. Rev. D 72, 035014 (2005) [arXiv:hep-ph/0502096]
F. Jegerlehner, in Prog. Part. Nucl. Phys. 27, 1 (1991) (books file: QCD111:P71:v.27)
M. Czakon, J. Gluza, F. Jegerlehner, M. Zrałek, Eur. J. Phys. C 13, 275 (2000)
M.C. Chen, S. Dawson, T. Krupovnickas, arXiv:hep- ph/0504286; M.C. Chen, S. Dawson, Phys. Rev. D 70, 015003 (2004) [arXiv:hep-ph/0311032]
G. Degrassi, A. Sirlin, Phys. Rev. D 40, 3066 (1989)
F. del Aguila, M. Masip, M. Perez-Victoria, Nucl. Phys. B 456, 531 (1995) [arXiv:hep-ph/9507455]
F. del Aguila, G.D. Coughlan, M. Quiros, Nucl. Phys. B 307, 633 (1988)
M. Luo, Y. Xiao Phys. Lett. B 555, 279 (2003) [arXiv:hep-ph/0212152]
K.S. Babu, C.F. Kolda, J. March-Russell, Phys. Rev. D 57, 6788 (1998) [arXiv:hep-ph/9710441]
T. Appelquist, B.A. Dobrescu, A.R. Hopper, Phys. Rev. D 68, 035012 (2003) [arXiv:hep-ph/0212073]
M. Carena, A. Daleo, B.A. Dobrescu, T.M.P. Tait, Phys. Rev. D 70, 093009 (2004) [arXiv:hep-ph/0408098]; D.A. Demir, G.L. Kane, T.T. Wang, Phys. Rev. D 72, 015012 (2005) [arXiv:hep-ph/0503290]
R. Barbieri, Lecture given at the CCAST Symposium on Particle Physics at the Fermi Scale, Beijing, China, May–June 1993, published in CCAST Symposium, 163 (1993)
S. Pokorski, “Gauge field theories”, 2nd Edition (Cambridge University Press, 2000)
P.H. Chankowski, P. Wasowicz, Eur. Phys. J C 23, 249 (2002)
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Chankowski, P., Pokorski, S. & Wagner, J. Z′ and the Appelquist–Carrazzone decoupling. Eur. Phys. J. C 47, 187–205 (2006). https://doi.org/10.1140/epjc/s2006-02537-3
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DOI: https://doi.org/10.1140/epjc/s2006-02537-3