Limits for Excited ${{\mathit \nu}}$ (${{\mathit \nu}^{*}}$) from Single Production
INSPIRE search
These limits are from ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \nu}}{{\mathit \nu}^{*}}$, ${{\mathit Z}}$ $\rightarrow$ ${{\mathit \nu}}{{\mathit \nu}^{*}}$, or ${{\mathit e}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \nu}^{*}}{{\mathit X}}$ and depend on transition magnetic coupling between ${{\mathit \nu}}/{{\mathit e}}$ and ${{\mathit \nu}^{*}}$. Assumptions about ${{\mathit \nu}^{*}}$ decay mode are given in footnotes.
| S054EXO |
| $\bf{> 213}$ |
95 |
1 |
|
H1 |
| • • • We do not use the following data for averages, fits, limits, etc. • • • |
| $>6000$ |
95 |
2 |
|
CMS |
| $>190$ |
95 |
3 |
|
L3 |
| $\text{none 50 - 150}$ |
95 |
4 |
|
H1 |
| $>158$ |
95 |
5 |
|
ZEUS |
|
1
AARON 2008 search for single ${{\mathit \nu}^{*}}$ production in ${{\mathit e}}{{\mathit p}}$ collisions with the decays ${{\mathit \nu}^{*}}$ $\rightarrow$ ${{\mathit \nu}}{{\mathit \gamma}}$, ${{\mathit \nu}}{{\mathit Z}}$, ${{\mathit e}}{{\mathit W}}$. The quoted limit assumes $\mathit f$ = $−{{\mathit f}^{\,'}}$ = $\Lambda /{\mathit m}_{{{\mathit \nu}^{*}}}$. See their Fig. 3 and Fig. 4 for the exclusion plots in the mass-coupling plane.
|
|
2
TUMASYAN 2023AL search for Majorana excited neutrino ${{\mathit \nu}^{*}}$ produced and decaying via gauge and contact interactions. The limit quoted above is for ${{\mathit \ell}}$ = ${{\mathit e}}$ with $\Lambda $ = M$_{{{\mathit \nu}^{*}}}$. The limit becomes M$_{{{\mathit \nu}^{*}}}$ $>$ 6.1 TeV for ${{\mathit \ell}}$ = ${{\mathit \mu}}$.
|
|
3
ACHARD 2003B result is from ${{\mathit e}^{+}}{{\mathit e}^{-}}$ collisions at $\sqrt {\mathit s }$ = $189 - 209$ GeV. The quoted limit is for ${{\mathit \nu}_{{{e}}}^{*}}$. ${{\mathit f}}$ = $\text{-}{{\mathit f}^{\,'}}$ = $\Lambda /{\mathit m}_{{{\mathit \nu}^{*}}}$ is assumed. See their Fig.$~$4 for the exclusion plot in the mass-coupling plane.
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|
4
ADLOFF 2002 search for single ${{\mathit \nu}^{*}}$ production in ${{\mathit e}}{{\mathit p}}$ collisions with the decays ${{\mathit \nu}^{*}}$ $\rightarrow$ ${{\mathit \nu}}{{\mathit \gamma}}$, ${{\mathit \nu}}{{\mathit Z}}$, ${{\mathit e}}{{\mathit W}}$. The quoted limit assumes ${{\mathit f}}$ = $−{{\mathit f}^{\,'}}$ = $\Lambda /{\mathit m}_{{{\mathit \nu}^{*}}}$. See their Fig.$~$1 for the exclusion plots in the mass-coupling plane.
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|
5
CHEKANOV 2002D search for single ${{\mathit \nu}^{*}}$ production in ${{\mathit e}}{{\mathit p}}$ collisions with the decays ${{\mathit \nu}^{*}}$ $\rightarrow$ ${{\mathit \nu}}{{\mathit \gamma}}$, ${{\mathit \nu}}{{\mathit Z}}$, ${{\mathit e}}{{\mathit W}}$. ${{\mathit f}}$ = $−{{\mathit f}^{\,'}}$ = $\Lambda /{\mathit m}_{{{\mathit \nu}^{*}}}$ is assumed for the ${{\mathit e}^{*}}$ coupling. CHEKANOV 2002D also obtain limit for ${{\mathit f}}$ = ${{\mathit f}^{\,'}}$ = $\Lambda /{\mathit m}_{{{\mathit \nu}^{*}}}$: ${\mathit m}_{{{\mathit \nu}^{*}}}>$135 GeV. See their Fig.$~$5c and Fig.$~$5d for the exclusion plot in the mass-coupling plane.
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| References: |
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PL B843 137803
|
Search for a heavy composite Majorana neutrino in events with dilepton signatures from proton-proton collisions at $\sqrt{s}$ = 13 TeV |
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PL B663 382
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A Search for Excited Neutrinos in ${{\mathit e}^{-}}{{\mathit p}}$ Collisions at HERA |
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PL B568 23
|
Search for Excited Leptons at LEP |
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PL B525 9
|
Search for Excited Neutrinos at HERA |
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PL B549 32
|
Searches for Excited Fermions in ${{\mathit e}}{{\mathit p}}$ Collisions at HERA |
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