Search for long-lived heavy neutral leptons and Higgs portal scalars decaying in the MicroBooNE detector

Abratenko, P.; Anthony, J.; Arellano, L.; Asaadi, J.; Ashkenazi, A.; Balasubramanian, S.; Baller, B.; Barnes, C.; Barr, G.; Barrow, J.; Basque, V.; Bathe-Peters, L.; Benevides Rodrigues, O.; Berkman, S.; Bhanderi, A.; Bhattacharya, M.; Bishai, M.; Blake, A.; Bogart, B.; Bolton, T.; Book, J. Y.; Camilleri, L.; Caratelli, D.; Caro Terrazas, I.; Cavanna, F.; Cerati, G.; Chen, Y.; Conrad, J. M.; Convery, M.; Cooper-Troendle, L.; Crespo-Anadón, J. I.; Del Tutto, M.; Dennis, S. R.; Detje, P.; Devitt, A.; Diurba, R.; Dorrill, R.; Duffy, K.; Dytman, S.; Eberly, B.; Ereditato, A.; Evans, J. J.; Fine, R.; Finnerud, O. G.; Foreman, W.; Fleming, B. T.; Foppiani, N.; Franco, D.; Furmanski, A. P.; Garcia-Gamez, D.; Gardiner, S.; Ge, G.; Gollapinni, S.; Goodwin, O.; Gramellini, E.; Green, P.; Greenlee, H.; Gu, W.; Guenette, R.; Guzowski, P.; Hagaman, L.; Hen, O.; Hicks, R.; Hilgenberg, C.; Horton-Smith, G. A.; Itay, R.; James, C.; Ji, X.; Jiang, L.; Jo, J. H.; Johnson, R. A.; Jwa, Y. -J.; Kalra, D.; Kamp, N.; Kaneshige, N.; Karagiorgi, G.; Ketchum, W.; Kirby, M.; Kobilarcik, T.; Kreslo, I.; Leibovitch, M. B.; Lepetic, I.; Li, J. -Y.; Li, K.; Li, Y.; Lin, K.; Littlejohn, B. R.; Louis, W. C.; Luo, X.; Manivannan, K.; Mariani, C.; Marsden, D.; Marshall, J.; Martinez Caicedo, D. A.; Mason, K.; Mastbaum, A.; McConkey, N.; Meddage, V.; Miller, K.; Mills, J.; Mistry, K.; Mogan, A.; Mohayai, T.; Mooney, M.; Moor, A. F.; Moore, C. D.; Mora Lepin, L.; Mousseau, J.; Mulleriababu, S.; Naples, D.; Navrer-Agasson, A.; Nayak, N.; Nebot-Guinot, M.; Newmark, D. A.; Nowak, J.; Nunes, M.; Oza, N.; Palamara, O.; Pallat, N.; Paolone, V.; Papadopoulou, A.; Papavassiliou, V.; Parkinson, H. B.; Pate, S. F.; Patel, N.; Pavlovic, Z.; Piasetzky, E.; Ponce-Pinto, I. D.; Prince, S.; Qian, X.; Raaf, J. L.; Radeka, V.; Rafique, A.; Reggiani-Guzzo, M.; Ren, L.; Rice, L. C. J.; Rochester, L.; Rodriguez Rondon, J.; Rosenberg, M.; Ross-Lonergan, M.; Rudolf von Rohr, C.; Scanavini, G.; Schmitz, D. W.; Schukraft, A.; Seligman, W.; Shaevitz, M. H.; Sharankova, R.; Shi, J.; Smith, A.; Snider, E. L.; Soderberg, M.; Söldner-Rembold, S.; Spitz, J.; Stancari, M.; St. John, J.; Strauss, T.; Sword-Fehlberg, S.; Szelc, A. M.; Tang, W.; Taniuchi, N.; Terao, K.; Thorpe, C.; Torbunov, D.; Totani, D.; Toups, M.; Tsai, Y. -T.; Tyler, J.; Uchida, M. A.; Usher, T.; Viren, B.; Weber, M.; Wei, H.; White, A. J.; Williams, Z.; Wolbers, S.; Wongjirad, T.; Wospakrik, M.; Wresilo, K.; Wright, N.; Wu, W.; Yandel, E.; Yang, T.; Yates, L. E.; Yu, H. W.; Zeller, G. P.; Zennamo, J.; Zhang, C.

doi:10.1103/PhysRevD.106.092006

Title: Search for long-lived heavy neutral leptons and Higgs portal scalars decaying in the MicroBooNE detector

Journal Article · Mon Nov 28 00:00:00 EST 2022 · Physical Review D

DOI:https://doi.org/10.1103/PhysRevD.106.092006· OSTI ID:1900060

Abratenko, P.; Anthony, J.; Arellano, L.; Asaadi, J.; Ashkenazi, A.; Balasubramanian, S.; Baller, B.; Barnes, C.; Barr, G.; Barrow, J.; Basque, V.; Bathe-Peters, L.; Benevides Rodrigues, O.; Berkman, S.; Bhanderi, A.; Bhattacharya, M.; Bishai, M.; Blake, A.; Bogart, B.; Bolton, T. more »

We present a search for long-lived Higgs portal scalars (HPS) and heavy neutral leptons (HNL) decaying in the MicroBooNE liquid-argon time projection chamber. The measurement is performed using data collected synchronously with the NuMI neutrino beam from Fermilab's Main Injector with a total exposure corresponding to 7.01×10²⁰ protons on target. We set upper limits at the 90% confidence level on the mixing parameter |U_μ4|² ranging from |U_μ4|²<12.9×10^–8 for Majorana HNLs with a mass of m_HNL=246 MeV to |U_μ4|²<0.92×10^–8 for m_HNL=385 MeV, assuming |U_e4|²=|U_τ4|²=0 and HNL decays into μ^±π^∓ pairs. These limits on |U_μ4|² represent an order of magnitude improvement in sensitivity compared to the previous MicroBooNE result. We also constrain the scalar-Higgs mixing angle θ by searching for HPS decays into μ⁺μ^– final states, excluding a contour in the parameter space with lower bounds of θ²<31.3×10^–9 for m_HPS=212 GeV and θ²<1.09×10^–9 for m_HPS=275 GeV. These are the first constraints on the scalar-Higgs mixing angle θ from a dedicated experimental search in this mass range.

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Research Organization:: Brookhaven National Laboratory (BNL), Upton, NY (United States); Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States); SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States); Los Alamos National Laboratory (LANL), Los Alamos, NM (United States); Virginia Polytechnic Inst. and State Univ. (Virginia Tech), Blacksburg, VA (United States); Univ. of Michigan, Ann Arbor, MI (United States)

Sponsoring Organization:: USDOE Office of Science (SC), High Energy Physics (HEP); USDOE Office of Science (SC), Nuclear Physics (NP)

Contributing Organization:: MicroBooNE Collaboration

Grant/Contract Number:: AC02-07CH11359; SC0012704; SC0023471; SC0007859

OSTI ID:: 1900060

Alternate ID(s):: OSTI ID: 1895579; OSTI ID: 1906063; OSTI ID: 1906286; OSTI ID: 1972324

Report Number(s):: BNL-223653-2022-JAAM; FERMILAB-PUB-22-507; arXiv:2207.03840; PRVDAQ; 092006

Journal Information:: Physical Review D, Journal Name: Physical Review D Vol. 106 Journal Issue: 9; ISSN 2470-0010

Publisher:: American Physical SocietyCopyright Statement

Country of Publication:: United States

Language:: English

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