Exploring dark $$Z_d$$ Z d -boson in future large hadron-electron collider
Abstract The interaction between the dark $$U(1)_d$$ U ( 1 ) d sector with the visible Standard Model (SM) sector takes place through the kinetic mixing between the dark photon $$U(1)_d$$ U ( 1 ) d field $$Z_d^\mu $$ Z d μ and the SM $$U(1)_Y$$ U ( 1 ) Y gauge field $$B_\mu $$ B μ . After the electr...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2023-02-01
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| Series: | European Physical Journal C: Particles and Fields |
| Online Access: | https://doi.org/10.1140/epjc/s10052-023-11291-7 |
| _version_ | 1797853585405378560 |
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| author | Ashok Goyal Mukesh Kumar Satendra Kumar Rafiqul Rahaman |
| author_facet | Ashok Goyal Mukesh Kumar Satendra Kumar Rafiqul Rahaman |
| author_sort | Ashok Goyal |
| collection | DOAJ |
| description | Abstract The interaction between the dark $$U(1)_d$$ U ( 1 ) d sector with the visible Standard Model (SM) sector takes place through the kinetic mixing between the dark photon $$U(1)_d$$ U ( 1 ) d field $$Z_d^\mu $$ Z d μ and the SM $$U(1)_Y$$ U ( 1 ) Y gauge field $$B_\mu $$ B μ . After the electroweak and $$U(1)_d$$ U ( 1 ) d symmetry breaking, the dark photon $$Z_d^\mu $$ Z d μ acquires a mass and mixes with the SM neutral vector boson $$Z_\mu $$ Z μ . This mixing leads to parity-violating coupling between the $$Z_d^\mu $$ Z d μ and SM. The coupling between the dark photon and SM can be explored in low energy phenomenology as well as in collider experiments. The Lorentz structure of dark photon interaction with SM fermions is explored in the proposed high energy future Large Hadron-electron collider, which would provide efficient energy and a clean environment using cross-section and asymmetries associated with polarisation observable of the dark photon in leptons decay. A $$\chi ^2$$ χ 2 -analysis is performed to compare the strength of various variables for both the charge- and neutral-current processes. Based on this analysis, $$90\%$$ 90 % confidence level (C.L.) contours in the $$\varepsilon $$ ε - $$m_{Z_d}$$ m Z d and $$\varepsilon $$ ε - $$g_V$$ g V plane are obtained to put limits on the $$Z_d^\mu $$ Z d μ mass up to 100 GeV, coupling strength $$\varepsilon $$ ε and on the Lorentz structure of dark photon coupling with the SM fermions ( $$g_V$$ g V ) at $$\sqrt{s} \approx 1.3$$ s ≈ 1.3 TeV. |
| first_indexed | 2024-04-09T19:53:01Z |
| format | Article |
| id | doaj.art-690335771038433f8ecdfefc9a8704fd |
| institution | Directory Open Access Journal |
| issn | 1434-6052 |
| language | English |
| last_indexed | 2024-04-09T19:53:01Z |
| publishDate | 2023-02-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | European Physical Journal C: Particles and Fields |
| spelling | doaj.art-690335771038433f8ecdfefc9a8704fd2023-04-03T05:37:57ZengSpringerOpenEuropean Physical Journal C: Particles and Fields1434-60522023-02-018321910.1140/epjc/s10052-023-11291-7Exploring dark $$Z_d$$ Z d -boson in future large hadron-electron colliderAshok Goyal0Mukesh Kumar1Satendra Kumar2Rafiqul Rahaman3Department of Physics, University of DelhiSchool of Physics and Institute for Collider Particle Physics, University of the Witwatersrand, WitsSchool of Basic Sciences, Indian Institute of Information Technology UnaRegional Centre for Accelerator-based Particle Physics, Harish-Chandra Research Institute, A CI of Homi Bhabha National InstituteAbstract The interaction between the dark $$U(1)_d$$ U ( 1 ) d sector with the visible Standard Model (SM) sector takes place through the kinetic mixing between the dark photon $$U(1)_d$$ U ( 1 ) d field $$Z_d^\mu $$ Z d μ and the SM $$U(1)_Y$$ U ( 1 ) Y gauge field $$B_\mu $$ B μ . After the electroweak and $$U(1)_d$$ U ( 1 ) d symmetry breaking, the dark photon $$Z_d^\mu $$ Z d μ acquires a mass and mixes with the SM neutral vector boson $$Z_\mu $$ Z μ . This mixing leads to parity-violating coupling between the $$Z_d^\mu $$ Z d μ and SM. The coupling between the dark photon and SM can be explored in low energy phenomenology as well as in collider experiments. The Lorentz structure of dark photon interaction with SM fermions is explored in the proposed high energy future Large Hadron-electron collider, which would provide efficient energy and a clean environment using cross-section and asymmetries associated with polarisation observable of the dark photon in leptons decay. A $$\chi ^2$$ χ 2 -analysis is performed to compare the strength of various variables for both the charge- and neutral-current processes. Based on this analysis, $$90\%$$ 90 % confidence level (C.L.) contours in the $$\varepsilon $$ ε - $$m_{Z_d}$$ m Z d and $$\varepsilon $$ ε - $$g_V$$ g V plane are obtained to put limits on the $$Z_d^\mu $$ Z d μ mass up to 100 GeV, coupling strength $$\varepsilon $$ ε and on the Lorentz structure of dark photon coupling with the SM fermions ( $$g_V$$ g V ) at $$\sqrt{s} \approx 1.3$$ s ≈ 1.3 TeV.https://doi.org/10.1140/epjc/s10052-023-11291-7 |
| spellingShingle | Ashok Goyal Mukesh Kumar Satendra Kumar Rafiqul Rahaman Exploring dark $$Z_d$$ Z d -boson in future large hadron-electron collider European Physical Journal C: Particles and Fields |
| title | Exploring dark $$Z_d$$ Z d -boson in future large hadron-electron collider |
| title_full | Exploring dark $$Z_d$$ Z d -boson in future large hadron-electron collider |
| title_fullStr | Exploring dark $$Z_d$$ Z d -boson in future large hadron-electron collider |
| title_full_unstemmed | Exploring dark $$Z_d$$ Z d -boson in future large hadron-electron collider |
| title_short | Exploring dark $$Z_d$$ Z d -boson in future large hadron-electron collider |
| title_sort | exploring dark z d z d boson in future large hadron electron collider |
| url | https://doi.org/10.1140/epjc/s10052-023-11291-7 |
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