002907860 001__ 2907860
002907860 005__ 20241206045142.0
002907860 0248_ $$aoai:cds.cern.ch:2907860$$pcerncds:FULLTEXT$$pcerncds:CERN:FULLTEXT$$pcerncds:CERN
002907860 037__ $$9arXiv:reportnumber$$aKCL-PH-TH/2024-45
002907860 037__ $$9arXiv:reportnumber$$aCERN-TH-2024-143
002907860 037__ $$9arXiv$$aarXiv:2408.12508$$chep-ph
002907860 035__ $$9arXiv$$aoai:arXiv.org:2408.12508
002907860 035__ $$9Inspire$$aoai:inspirehep.net:2820696$$d2024-12-05T04:11:02Z$$h2024-12-06T03:00:18Z$$mmarcxml$$ttrue$$uhttps://inspirehep.net/api/oai2d
002907860 035__ $$9Inspire$$a2820696
002907860 041__ $$aeng
002907860 100__ $$aEllis, John$$mjohn.ellis@cern.ch$$uShanghai Jiaotong U.$$uKing's Coll. London$$uCERN$$vT. D. Lee Institute, Shanghai Jiao Tong University, Shanghai, China$$vDepartment of Physics, King's College London, Strand, London WC2R 2LS, UK$$vTheoretical Physics Department, CERN, CH-1211 Geneva 23, Switzerland
002907860 245__ $$9arXiv$$aUV Completion of Neutral Triple Gauge Couplings
002907860 269__ $$c2024-08-22
002907860 300__ $$a26 p
002907860 500__ $$9arXiv$$aOnly minor refinements, to match PRD journal version, references
added
002907860 520__ $$9arXiv$$aNeutral triple gauge couplings (nTGCs) are manifestation of new physics beyond the Standard Model (SM), as they are absent in the SM and are first generated by dimension-8 operators in the SM Effective Field Theory (SMEFT). We study the UV completion of nTGCs in a renormalizable model with vector-like heavy fermions. We compute the one-loop heavy fermion contributions to nTGC vertices by matching them to dimension-8 operators in the low energy limit. Such fermion loops contain either heavy fermions only or mixture of heavy fermions with light SM fermions. We find that their contributions can induce dimension-8 nTGC effective operators containing two SM Higgs-doublet fields, which are formulated with a complete set of 7 dimension-8 operators generating off-shell CP-even nTGCs. We present the results in terms of SMEFT coefficients and in terms of nTGC vertices (form factors) with two on-shell gauge bosons. In the heavy-light mixing case there appear terms that cannot be accommodated by conventional parametrizations of form factors due to extra logarithmic corrections. We further discuss the implications for probing such UV dynamics via nTGCs at the high energy colliders.
002907860 540__ $$3preprint$$aCC BY 4.0$$uhttp://creativecommons.org/licenses/by/4.0/
002907860 595__ $$aCERN-TH
002907860 65017 $$2arXiv$$ahep-ph
002907860 65017 $$2SzGeCERN$$aParticle Physics - Phenomenology
002907860 690C_ $$aCERN
002907860 690C_ $$aPREPRINT
002907860 700__ $$aHe, Hong-Jian$$mhjhe@sjtu.edu.cn$$uShanghai Jiaotong U.$$uShanghai Jiao Tong U.$$uTsinghua U., Beijing$$uPeking U., CHEP$$vT. D. Lee Institute, Shanghai Jiao Tong University, Shanghai, China$$vSchool of Physics and Astronomy, Key Laboratory for Particle Astrophysics and Cosmology,$$vShanghai Key Laboratory for Particle Physics and Cosmology, Shanghai Jiao Tong University, Shanghai, China$$vPhysics Department, Tsinghua University, Beijing, China;$$vCenter for High Energy Physics, Peking University, Beijing, China
002907860 700__ $$aXiao, Rui-Qing$$uShanghai Jiaotong U.$$uKing's Coll. London$$uShanghai Jiao Tong U.$$vShanghai Key Laboratory for Particle Physics and Cosmology, Shanghai Jiao Tong University, Shanghai, China$$vDepartment of Physics, King's College London, Strand, London WC2R 2LS, UK$$vSchool of Physics and Astronomy, Key Laboratory for Particle Astrophysics and Cosmology,$$vT. D. Lee Institute, Shanghai Jiao Tong University, Shanghai, China
002907860 700__ $$aZeng, Shi-Ping$$mspzeng@sjtu.edu.cn$$uShanghai Jiaotong U.$$uShanghai Jiao Tong U.$$vT. D. Lee Institute, Shanghai Jiao Tong University, Shanghai, China$$vSchool of Physics and Astronomy, Key Laboratory for Particle Astrophysics and Cosmology,$$vShanghai Key Laboratory for Particle Physics and Cosmology, Shanghai Jiao Tong University, Shanghai, China
002907860 700__ $$aZheng, Jiaming$$mzhengjm3@gmail.com$$uShanghai Jiaotong U.$$uShanghai Jiao Tong U.$$vT. D. Lee Institute, Shanghai Jiao Tong University, Shanghai, China$$vSchool of Physics and Astronomy, Key Laboratory for Particle Astrophysics and Cosmology,$$vShanghai Key Laboratory for Particle Physics and Cosmology, Shanghai Jiao Tong University, Shanghai, China
002907860 8564_ $$82553003$$s24148$$uhttps://cds.cern.ch/record/2907860/files/fig2.png$$y00001 \small List of the relevant one-loop contributions to the four types of nTGC vertices, including the vertices of $BWW$ (1st row), $WBB$ (2nd row), $BBB$ (3rd and 4th rows), and $WWW$ (5th row).\ The loop structures are those shown in Fig.\,\ref{fig:1}, where for each diagram a sum over directions of the fermion loop flows is implied.\ In each diagram, the dashed lines denote Higgs fields, the thin solid lines denote $E$ propagators, the thick solid lines denote $N$ propagators, and the wiggly lines denote gauge bosons.\
002907860 8564_ $$82553004$$s2725$$uhttps://cds.cern.ch/record/2907860/files/fig4.png$$y00003 \small Sample diagrams that enter the Ward-Takahashi identity \eqref{eq:WT_position_space}.\ Plot (a) has 3 external gauge bosons attached to a fermion loop.\ Plot (b) has 2 vector bosons attached to the fermion loop and one to the Higgs line.\ Plot (c) gives the correlation function involving 2 gauge bosons that enter the left-hand side of Eq.\eqref{eq:WT_position_space}. In each diagram, the dashed lines denote Higgs fields, the solid lines denote fermion propagators, and the wiggly lines denote gauge bosons.\
002907860 8564_ $$82553005$$s739015$$uhttps://cds.cern.ch/record/2907860/files/2408.12508.pdf$$yFulltext
002907860 8564_ $$82553006$$s1040$$uhttps://cds.cern.ch/record/2907860/files/fig3.png$$y00002 \small A sample two-loop diagram containing internal fields of heavy fermions and Higgs doublet that contribute to the nTGCs.\ The dashed lines denote Higgs fields, the thin solid lines denote $E$ propagators, the thick solid lines denote $N$ propagators, and the wiggly lines denote gauge bosons.\ Here a sum over directions of the fermion loop flows is implied.
002907860 8564_ $$82553007$$s4824$$uhttps://cds.cern.ch/record/2907860/files/fig1.png$$y00000 \small Two classes of one-loop fermionic contributions to the nTGCs, including the pure heavy fermion loops as shown in the first row, or including the mixed heavy-light fermion loops as shown in the second row.\ In each class there are four types of fermionic loop diagrams that contribute to the nTGCs.\ The dashed lines denote Higgs fields, the thin solid lines denote $E$ propagators, the thick solid lines denote $N$ propagators, and the wiggly lines denote gauge bosons.\ The sum over directions of fermion flow is implied for each diagram.
002907860 960__ $$a11
002907860 980__ $$aPREPRINT