Use of Z polarization in e+e− → ZH to measure the triple-Higgs coupling
It is shown that a certain angular asymmetry of charged leptons produced in the decay of Z in the process e+e−→ZH, related to a tensor polarization component of the Z, can be used to constrain the anomalous triple-Higgs coupling, independent of the other anomalous couplings like the ZZH coupling whi...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2022-02-01
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| Series: | Nuclear Physics B |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0550321321003461 |
| _version_ | 1798035629960855552 |
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| author | Kumar Rao Saurabh D. Rindani Priyanka Sarmah Balbeer Singh |
| author_facet | Kumar Rao Saurabh D. Rindani Priyanka Sarmah Balbeer Singh |
| author_sort | Kumar Rao |
| collection | DOAJ |
| description | It is shown that a certain angular asymmetry of charged leptons produced in the decay of Z in the process e+e−→ZH, related to a tensor polarization component of the Z, can be used to constrain the anomalous triple-Higgs coupling, independent of the other anomalous couplings like the ZZH coupling which dominate at tree level. This is because the angular asymmetry is odd under naïve time reversal, and hence dependent on loop-level contributions. At a future e+e− collider like the International Linear Collider (ILC), for example, a limit of about 3.4 might be placed on the ratio of the actual triple Higgs coupling to that predicted in the standard model for a centre-of-mass energy of 500 GeV and an integrated luminosity of 30 fb−1 with electron and positron beams having longitudinal polarization of −80% and +30%, respectively. |
| first_indexed | 2024-04-11T21:00:57Z |
| format | Article |
| id | doaj.art-478e5afbb13944ecb453c218d0df15b0 |
| institution | Directory Open Access Journal |
| issn | 0550-3213 |
| language | English |
| last_indexed | 2024-04-11T21:00:57Z |
| publishDate | 2022-02-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Nuclear Physics B |
| spelling | doaj.art-478e5afbb13944ecb453c218d0df15b02022-12-22T04:03:30ZengElsevierNuclear Physics B0550-32132022-02-01975115649Use of Z polarization in e+e− → ZH to measure the triple-Higgs couplingKumar Rao0Saurabh D. Rindani1Priyanka Sarmah2Balbeer Singh3Department of Physics, Indian Institute of Technology, Powai, Mumbai 400076, IndiaTheoretical Physics Division, Physical Research Laboratory, Navrangpura, Ahmedabad 380009, India; Corresponding author.Department of Physics, Indian Institute of Technology, Powai, Mumbai 400076, IndiaDepartment of Theoretical Physics, Tata Institute of Fundamental Research, Dr. Homi Bhabha Road, Colaba, Mumbai 400005, IndiaIt is shown that a certain angular asymmetry of charged leptons produced in the decay of Z in the process e+e−→ZH, related to a tensor polarization component of the Z, can be used to constrain the anomalous triple-Higgs coupling, independent of the other anomalous couplings like the ZZH coupling which dominate at tree level. This is because the angular asymmetry is odd under naïve time reversal, and hence dependent on loop-level contributions. At a future e+e− collider like the International Linear Collider (ILC), for example, a limit of about 3.4 might be placed on the ratio of the actual triple Higgs coupling to that predicted in the standard model for a centre-of-mass energy of 500 GeV and an integrated luminosity of 30 fb−1 with electron and positron beams having longitudinal polarization of −80% and +30%, respectively.http://www.sciencedirect.com/science/article/pii/S0550321321003461 |
| spellingShingle | Kumar Rao Saurabh D. Rindani Priyanka Sarmah Balbeer Singh Use of Z polarization in e+e− → ZH to measure the triple-Higgs coupling Nuclear Physics B |
| title | Use of Z polarization in e+e− → ZH to measure the triple-Higgs coupling |
| title_full | Use of Z polarization in e+e− → ZH to measure the triple-Higgs coupling |
| title_fullStr | Use of Z polarization in e+e− → ZH to measure the triple-Higgs coupling |
| title_full_unstemmed | Use of Z polarization in e+e− → ZH to measure the triple-Higgs coupling |
| title_short | Use of Z polarization in e+e− → ZH to measure the triple-Higgs coupling |
| title_sort | use of z polarization in e e zh to measure the triple higgs coupling |
| url | http://www.sciencedirect.com/science/article/pii/S0550321321003461 |
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