Higgsinos with masses near the electroweak scale can solve the hierarchy problem and provide a dark matter candidate, while detecting them at the LHC remains challenging if their mass splitting is Formula Presented. This Letter presents a novel search for nearly mass-degenerate Higgsinos in events with an energetic jet, missing transverse momentum, and a low-momentum track with a significant transverse impact parameter using Formula Presented of proton-proton collision data at Formula Presented collected by the ATLAS experiment. For the first time since LEP, a range of mass splittings between the lightest charged and neutral Higgsinos from 0.3 to 0.9 GeV is excluded at 95% confidence level, with a maximum reach of approximately 170 GeV in the Higgsino mass.

Search for Nearly Mass-Degenerate Higgsinos Using Low-Momentum Mildly Displaced Tracks in pp Collisions at Formula Presented with the ATLAS Detector / Filmer, E.K., Grant, C.M., Jackson, P., Kong, A.X.Y., Pandya, H.D., Potti, H., Ruggeri, T.A., Saha, S., Ting, E.X.L., White, M.J., Gingrich, D.M., Lindon, J.H., Nishu, N., Pinfold, J.L., Cakir, O., Canbay, A.C., Yildiz, H.D., Kuday, S., Turk Cakir, I., Sultansoy, S., et al.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 132:22(2024). [10.1103/PhysRevLett.132.221801]

Search for Nearly Mass-Degenerate Higgsinos Using Low-Momentum Mildly Displaced Tracks in pp Collisions at Formula Presented with the ATLAS Detector

Cristoforetti M.;Di Luca A.;Follega F. M.;Iuppa R.;Mascione D.;Ricci E.;
2024-01-01

Abstract

Higgsinos with masses near the electroweak scale can solve the hierarchy problem and provide a dark matter candidate, while detecting them at the LHC remains challenging if their mass splitting is Formula Presented. This Letter presents a novel search for nearly mass-degenerate Higgsinos in events with an energetic jet, missing transverse momentum, and a low-momentum track with a significant transverse impact parameter using Formula Presented of proton-proton collision data at Formula Presented collected by the ATLAS experiment. For the first time since LEP, a range of mass splittings between the lightest charged and neutral Higgsinos from 0.3 to 0.9 GeV is excluded at 95% confidence level, with a maximum reach of approximately 170 GeV in the Higgsino mass.
2024
22
Filmer, E. K.; Grant, C. M.; Jackson, P.; Kong, A. X. Y.; Pandya, H. D.; Potti, H.; Ruggeri, T. A.; Saha, S.; Ting, E. X. L.; White, M. J.; Gingrich, ...espandi
Search for Nearly Mass-Degenerate Higgsinos Using Low-Momentum Mildly Displaced Tracks in pp Collisions at Formula Presented with the ATLAS Detector / Filmer, E.K., Grant, C.M., Jackson, P., Kong, A.X.Y., Pandya, H.D., Potti, H., Ruggeri, T.A., Saha, S., Ting, E.X.L., White, M.J., Gingrich, D.M., Lindon, J.H., Nishu, N., Pinfold, J.L., Cakir, O., Canbay, A.C., Yildiz, H.D., Kuday, S., Turk Cakir, I., Sultansoy, S., et al.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 132:22(2024). [10.1103/PhysRevLett.132.221801]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11572/428830
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