Abstract
One of the most-studied signals for physics beyond the standard model in the production of gauge bosons in electron-positron collisions is due to the anomalous triple gauge boson couplings in the Zγ final state. In this work, we study the implications of this at the ILC with polarized beams for signals that go beyond traditional anomalous triple neutral gauge boson couplings. Here we report a dimension-8 CP-conserving ZγZ vertex that has not found mention in the literature. We carry out a systematic study of the anomalous couplings in general terms and arrive at a classification. We then obtain linear-order distributions with and without CP violation. Furthermore, we place the study in the context of general BSM interactions represented by e + e − Zγ contact interactions. We set up a correspondence between the triple gauge boson couplings and the four-point contact interactions. We also present sensitivities on these anomalous couplings, which will be achievable at the ILC with realistic polarization and luminosity.
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T. Behnke et al., The International Linear Collider Technical Design Report. Volume 1: Executive Summary, arXiv:1306.6327 [INSPIRE].
H. Baer et al., The International Linear Collider Technical Design Report. Volume 2: Physics, arXiv:1306.6352 [INSPIRE].
G. Moortgat-Pick et al., The Role of polarized positrons and electrons in revealing fundamental interactions at the linear collider, Phys. Rept. 460 (2008) 131 [hep-ph/0507011] [INSPIRE].
S. Riemann, A. Schalicke and A. Ushakov, Polarized positrons for future linear colliders, J. Phys. Conf. Ser. 298 (2011) 012020 [INSPIRE].
K. Hagiwara, R.D. Peccei, D. Zeppenfeld and K. Hikasa, Probing the Weak Boson Sector in e + e − → W + W −, Nucl. Phys. B 282 (1987) 253 [INSPIRE].
F.M. Renard, Tests of Neutral Gauge Boson Selfcouplings With e + e − → γZ, Nucl. Phys. B 196 (1982) 93 [INSPIRE].
G. Gounaris, R. Kogerler and D. Schildknecht, On Z 0 → e + e − γ decays, Phys. Lett. B 137 (1984) 261 [INSPIRE].
U. Baur and E.L. Berger, Probing the weak boson sector in Zγ production at hadron colliders, Phys. Rev. D 47 (1993) 4889 [INSPIRE].
G. Gounaris et al., Triple gauge boson couplings, hep-ph/9601233 [INSPIRE].
G.J. Gounaris, J. Layssac and F.M. Renard, Signatures of the anomalous Zγ and ZZ production at the lepton and hadron colliders, Phys. Rev. D 61 (2000) 073013 [hep-ph/9910395] [INSPIRE].
H. Czyz, K. Kolodziej and M. Zralek, Composite Z Boson and CP Violation in the Process e + e − → Zγ, Z. Phys. C 43 (1989) 97 [INSPIRE].
D. Choudhury and S.D. Rindani, Test of CP-violating neutral gauge boson vertices in e + e − → γZ, Phys. Lett. B 335 (1994) 198 [hep-ph/9405242] [INSPIRE].
S.Y. Choi, Probing the weak boson sector in γe → Ze, Z. Phys. C 68 (1995) 163 [hep-ph/9412300] [INSPIRE].
J. Ellison and J. Wudka, Study of trilinear gauge boson couplings at the Tevatron collider, Ann. Rev. Nucl. Part. Sci. 48 (1998) 33 [hep-ph/9804322] [INSPIRE].
U. Baur and D.L. Rainwater, Probing neutral gauge boson selfinteractions in ZZ production at hadron colliders, Phys. Rev. D 62 (2000) 113011 [hep-ph/0008063] [INSPIRE].
I. Ots, H. Uibo, H. Liivat, R.K. Loide and R. Saar, Spin polarization and alignment of the single Z boson from e + e − annihilation, Nucl. Phys. B 588 (2000) 90 [INSPIRE].
S. Atag and I. Sahin, ZZγ and Zγγ couplings in γe collision with polarized beams, Phys. Rev. D 68 (2003) 093014 [hep-ph/0310047] [INSPIRE].
I. Ots, H. Uibo, H. Liivat, R. Saar and R.K. Loide, Possible anomalous ZZγ and Zγγ couplings and Z boson spin orientation in e + e − → Zγ, Nucl. Phys. B 702 (2004) 346 [INSPIRE].
I. Ots, H. Uibo, H. Liivat, R. Saar and R.K. Loide, Possible anomalous ZZγ and Zγγ couplings and Z boson spin orientation in e + e − → Zγ: The role of transverse polarization, Nucl. Phys. B 740 (2006) 212 [INSPIRE].
A. Gutierrez-Rodriguez, M.A. Hernandez-Ruiz and M.A. Perez, Probing the ZZγ and Zγγ Couplings Through the Process e + e − → \( \nu \overline{\nu}\gamma \), Phys. Rev. D 80 (2009) 017301 [arXiv:0808.0945] [INSPIRE].
S. Groote, H. Liivat and I. Ots, Symmetries and similarities for spin orientation parameters in e + e − → ZH, Zγ, ZZ at SM thresholds, Nucl. Phys. B 843 (2011) 213 [arXiv:1008.0917] [INSPIRE].
B. Ananthanarayan, S.K. Garg, M. Patra and S.D. Rindani, Isolating CP-violating γZZ coupling in e + e − → γZ with transverse beam polarizations, Phys. Rev. D 85 (2012) 034006 [arXiv:1104.3645] [INSPIRE].
O. Catà, Revisiting ZZ and γZ production with effective field theories, arXiv:1304.1008 [INSPIRE].
C. Degrande, A basis of dimension-eight operators for anomalous neutral triple gauge boson interactions, JHEP 02 (2014) 101 [arXiv:1308.6323] [INSPIRE].
F. Larios, M.A. Perez, G. Tavares-Velasco and J.J. Toscano, Itemization of trilinear couplings for neutral gauge bosons, AIP Conf. Proc. 531 (2000) 346 [INSPIRE].
F. Larios, M.A. Perez, G. Tavares-Velasco and J.J. Toscano, Trilinear neutral gauge boson couplings in effective theories, Phys. Rev. D 63 (2001) 113014 [hep-ph/0012180] [INSPIRE].
L3 collaboration, P. Achard et al., Study of the e + e − → Zγ process at LEP and limits on triple neutral-gauge-boson couplings, Phys. Lett. B 597 (2004) 119 [hep-ex/0407012] [INSPIRE].
OPAL collaboration, G. Abbiendi et al., Study of Z pair production and anomalous couplings in e + e − collisions at \( \sqrt{s} \) between 190 GeV and 209 GeV, Eur. Phys. J. C 32 (2003) 303 [hep-ex/0310013] [INSPIRE].
D0 collaboration, V.M. Abazov et al., Zγ production and limits on anomalous ZZγ and Zγγ couplings in \( p\overline{p} \) collisions at \( \sqrt{s} \) = 1.96 TeV, Phys. Rev. D 85 (2012) 052001 [arXiv:1111.3684] [INSPIRE].
CDF collaboration, T. Aaltonen et al., Limits on Anomalous Trilinear Gauge Couplings in Zγ Events from \( p\overline{p} \) Collisions at \( \sqrt{s} \) = 1.96 TeV, Phys. Rev. Lett. 107 (2011) 051802 [arXiv:1103.2990] [INSPIRE].
ATLAS collaboration, Measurements of Wγ and Zγ production in pp collisions at \( \sqrt{s} \) = 7 TeV with the ATLAS detector at the LHC, Phys. Rev. D 87(2013) 112003 [arXiv:1302.1283] [INSPIRE].
CMS collaboration, Measurement of the production cross section for Zγ → \( \nu \overline{\nu}\gamma \) in pp collisions at \( \sqrt{s} \) = 7 TeV and limits on ZZγ and Zγγ triple gauge boson couplings, JHEP 10 (2013) 164 [arXiv:1309.1117] [INSPIRE].
B. Ananthanarayan and S.D. Rindani, Transverse beam polarization and CP violation in e + e − → γZ with contact interactions, Phys. Lett. B 606 (2005) 107 [hep-ph/0410084] [INSPIRE].
B. Ananthanarayan and S.D. Rindani, New physics in e + e − → Zγ with polarized beams, JHEP 10 (2005) 077 [hep-ph/0507037] [INSPIRE].
K.J. Abraham and B. Lampe, Description of possible CP effects in \( b\overline{b}\gamma \) events at LEP, Phys. Lett. B 326 (1994) 175 [INSPIRE].
K.J. Abraham and B. Lampe, Possible nonstandard effects in Zγ events at LEP-2, Phys. Lett. B 446 (1999) 163 [hep-ph/9810205] [INSPIRE].
S.D. Drell and S.J. Parke, Constraints on Radiative Z 0 Decays, Phys. Rev. Lett. 53 (1984) 1993 [INSPIRE].
B. Ananthanarayan, S.D. Rindani, R.K. Singh and A. Bartl, Transverse beam polarization and CP-violating triple-gauge-boson couplings in e + e − → γZ, Phys. Lett. B 593 (2004) 95 [Erratum ibid. B 608 (2005) 274-275] [hep-ph/0404106] [INSPIRE].
Particle Data Group collaboration, J. Beringer et al., Review of Particle Physics (RPP), Phys. Rev. D 86 (2012) 010001 [INSPIRE].
ATLAS collaboration, Physics at a High-Luminosity LHC with ATLAS, arXiv:1307.7292 [INSPIRE].
CMS collaboration, Projected Performance of an Upgraded CMS Detector at the LHC and HL-LHC: Contribution to the Snowmass Process, arXiv:1307.7135 [INSPIRE].
CLIC Detector and Physics Study collaboration, H. Abramowicz et al., Physics at the CLIC e + e − Linear Collider - Input to the Snowmass process 2013, arXiv:1307.5288 [INSPIRE].
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Ananthanarayan, B., Lahiri, J., Patra, M. et al. New physics in e + e − → Zγ at the ILC with polarized beams: explorations beyond conventional anomalous triple gauge boson couplings. J. High Energ. Phys. 2014, 124 (2014). https://doi.org/10.1007/JHEP08(2014)124
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DOI: https://doi.org/10.1007/JHEP08(2014)124