Measuring CP nature of $$h\tau {{\bar{\tau }}}$$ h τ τ ¯ coupling at $$e^-p$$ e - p collider
Abstract The proposed future $$e^- p$$ e - p collider provides sufficient energies to produce the Standard Model Higgs Boson (h) through $$W^\pm $$ W ± and Z-Boson fusion in charged and neutral current modes, respectively and to measure its properties. We take this opportunity to investigate the pro...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2022-06-01
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| Series: | European Physical Journal C: Particles and Fields |
| Online Access: | https://doi.org/10.1140/epjc/s10052-022-10445-3 |
| _version_ | 1811242297571934208 |
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| author | Sukanta Dutta Ashok Goyal Mukesh Kumar Abhaya Kumar Swain |
| author_facet | Sukanta Dutta Ashok Goyal Mukesh Kumar Abhaya Kumar Swain |
| author_sort | Sukanta Dutta |
| collection | DOAJ |
| description | Abstract The proposed future $$e^- p$$ e - p collider provides sufficient energies to produce the Standard Model Higgs Boson (h) through $$W^\pm $$ W ± and Z-Boson fusion in charged and neutral current modes, respectively and to measure its properties. We take this opportunity to investigate the prospect of measuring the CP properties of h through $$h \rightarrow \tau ^{+} \tau ^{-}$$ h → τ + τ - , where $$\tau ^{-}\,\left( \tau ^{+}\right) $$ τ - τ + decays to a charged pion $$\pi ^-\,\left( \pi ^+\right) $$ π - π + and a neutral pion $$\pi ^0$$ π 0 in association with neutrino (anti-neutrino). An interesting CP sensitive angular observable $$\alpha _{\mathrm{CP}}$$ α CP between the two $$\tau $$ τ -leptons decay plane in the $$\pi ^+\pi ^-$$ π + π - centre of mass frame is proposed and investigated in this work. For fixed electron energy of 150 GeV along with 7 (50) TeV of proton energy, the CP phase can be measured approximately to $$25^\circ $$ 25 ∘ ( $$14^\circ $$ 14 ∘ ) at integrated luminosity of 1 ab $$^{-1}$$ - 1 for −80% polarised electron at 95% confidence level. |
| first_indexed | 2024-04-12T13:49:38Z |
| format | Article |
| id | doaj.art-94a55d1046c04ad3a9d06cf6bff9988d |
| institution | Directory Open Access Journal |
| issn | 1434-6052 |
| language | English |
| last_indexed | 2024-04-12T13:49:38Z |
| publishDate | 2022-06-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | European Physical Journal C: Particles and Fields |
| spelling | doaj.art-94a55d1046c04ad3a9d06cf6bff9988d2022-12-22T03:30:35ZengSpringerOpenEuropean Physical Journal C: Particles and Fields1434-60522022-06-0182611110.1140/epjc/s10052-022-10445-3Measuring CP nature of $$h\tau {{\bar{\tau }}}$$ h τ τ ¯ coupling at $$e^-p$$ e - p colliderSukanta Dutta0Ashok Goyal1Mukesh Kumar2Abhaya Kumar Swain3SGTB Khalsa College, University of Delhi (DU)Department of Physics and Astrophysics, University of DelhiSchool of Physics and Institute for Collider Particle Physics, University of the Witwatersrand, WitsSGTB Khalsa College, University of Delhi (DU)Abstract The proposed future $$e^- p$$ e - p collider provides sufficient energies to produce the Standard Model Higgs Boson (h) through $$W^\pm $$ W ± and Z-Boson fusion in charged and neutral current modes, respectively and to measure its properties. We take this opportunity to investigate the prospect of measuring the CP properties of h through $$h \rightarrow \tau ^{+} \tau ^{-}$$ h → τ + τ - , where $$\tau ^{-}\,\left( \tau ^{+}\right) $$ τ - τ + decays to a charged pion $$\pi ^-\,\left( \pi ^+\right) $$ π - π + and a neutral pion $$\pi ^0$$ π 0 in association with neutrino (anti-neutrino). An interesting CP sensitive angular observable $$\alpha _{\mathrm{CP}}$$ α CP between the two $$\tau $$ τ -leptons decay plane in the $$\pi ^+\pi ^-$$ π + π - centre of mass frame is proposed and investigated in this work. For fixed electron energy of 150 GeV along with 7 (50) TeV of proton energy, the CP phase can be measured approximately to $$25^\circ $$ 25 ∘ ( $$14^\circ $$ 14 ∘ ) at integrated luminosity of 1 ab $$^{-1}$$ - 1 for −80% polarised electron at 95% confidence level.https://doi.org/10.1140/epjc/s10052-022-10445-3 |
| spellingShingle | Sukanta Dutta Ashok Goyal Mukesh Kumar Abhaya Kumar Swain Measuring CP nature of $$h\tau {{\bar{\tau }}}$$ h τ τ ¯ coupling at $$e^-p$$ e - p collider European Physical Journal C: Particles and Fields |
| title | Measuring CP nature of $$h\tau {{\bar{\tau }}}$$ h τ τ ¯ coupling at $$e^-p$$ e - p collider |
| title_full | Measuring CP nature of $$h\tau {{\bar{\tau }}}$$ h τ τ ¯ coupling at $$e^-p$$ e - p collider |
| title_fullStr | Measuring CP nature of $$h\tau {{\bar{\tau }}}$$ h τ τ ¯ coupling at $$e^-p$$ e - p collider |
| title_full_unstemmed | Measuring CP nature of $$h\tau {{\bar{\tau }}}$$ h τ τ ¯ coupling at $$e^-p$$ e - p collider |
| title_short | Measuring CP nature of $$h\tau {{\bar{\tau }}}$$ h τ τ ¯ coupling at $$e^-p$$ e - p collider |
| title_sort | measuring cp nature of h tau bar tau h τ τ ¯ coupling at e p e p collider |
| url | https://doi.org/10.1140/epjc/s10052-022-10445-3 |
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