DOE OSTI · 3006311
First displaced vertex search for electroproduced dark-sector strongly interacting massive particles by the HPS experiment
Abstract
The Heavy Photon Search experiment (HPS) is a fixed-target, electron beam experiment designed to search for 𝑒 + 𝑒 − mass resonances and displaced decays using a forward acceptance spectrometer. This paper details the search for naturally long-lived “dark” vector mesons (𝑉 𝐷 ) arising from a dark sector of beyond-Standard-Model strongly interacting massive particles, characterized by a QCD-like 𝑆𝑈(3) 𝐷 symmetry and coupled to the Standard Model photon via a new 𝑈(1) 𝐷 gauge interaction mediated by the “heavy photon,” or 𝐴′. The results are based on an integrated luminosity of 10 608 nb −1 collected during the 2016 HPS engineering run. The displaced vertex search for 𝑉 𝐷 → 𝑒 + 𝑒 − in the 𝑒 + 𝑒 − invariant mass range 39–179 MeV showed no statistically significant evidence for signal above the QED background.
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Adrian, P. H. [SLAC National Accelerator Laboratory], Baltzell, N. A. [Thomas Jefferson National Accelerator Facility], Battaglieri, M. [INFN], Bondí, M. [INFN], Boyarinov, S. [Thomas Jefferson National Accelerator Facility], Bravo, C. [SLAC National Accelerator Laboratory], Bueltmann, S. [Old Dominion University], Butti, P. [SLAC National Accelerator Laboratory], Burkert, V. D. [Thomas Jefferson National Accelerator Facility], Calvo, D. [INFN], Cao, T. [University of New Hampshire; Thomas Jefferson National Accelerator Facility], Carpinelli, M. [University di Milano Bicocca; Laboratori Nazionali del Sud], Celentano, A. [INFN], Charles, G. [Université Paris-Saclay], Colaneri, L. [Università di Roma Tor Vergata; INFN], Cooper, W. [Fermi National Accelerator Laboratory], Crowe, B. [University of New Hampshire], Cuevas, C. [Thomas Jefferson National Accelerator Facility], D’Angelo, A. [Università di Roma Tor Vergata; INFN], Dashyan, N. [Yerevan Physics Institute], De Napoli, M. [Università degli Studi di Catania; INFN], De Vita, R. [INFN; Thomas Jefferson National Accelerator Facility], Deur, A. [Thomas Jefferson National Accelerator Facility], Diamond, M. [SLAC National Accelerator Laboratory; University of Toronto Department of Physics], Dupre, R. [Université Paris-Saclay], Egiyan, H. [Thomas Jefferson National Accelerator Facility], Eichlersmith, T. [University of Minnesota], Elouadrhiri, L. [Thomas Jefferson National Accelerator Facility], Essig, R. [Stony Brook University], Fadeyev, V. [University of California], Field, C. [SLAC National Accelerator Laboratory], Filippi, A. [INFN], Freyberger, A. [Thomas Jefferson National Accelerator Facility], Gaiser, S. [Stanford University], Garçon, M. [Université Paris-Saclay], Gevorgyan, N. [Yerevan Physics Institute], Girod, F. X. [Thomas Jefferson National Accelerator Facility], Graf, N. [SLAC National Accelerator Laboratory], Graham, M. [SLAC National Accelerator Laboratory] (ORCID:0000000207654635), Griffioen, K. A. [College of William & Mary], Grillo, A. [University of California], Guidal, M. [Université Paris-Saclay], Herbst, R. [SLAC National Accelerator Laboratory], Holtrop, M. [University of New Hampshire], Jaros, J. [SLAC National Accelerator Laboratory], Johnson, R. P. [University of California], Kalicy, G. [Catholic University of America], Khandaker, M. [Idaho State University], Kubarovsky, V. [Thomas Jefferson National Accelerator Facility], Leonora, E. [INFN], Livingston, K. [University of Glasgow], Marsicano, L. [INFN], Maruyama, T. [SLAC National Accelerator Laboratory], McCarty, S. [University of New Hampshire], McCormick, J. [SLAC National Accelerator Laboratory], McKinnon, B. [University of Glasgow], Moffeit, K. [University of Glasgow], Moreno, O. [SLAC National Accelerator Laboratory; University of California], Munoz Camacho, C. [Université Paris-Saclay], Nelson, T. [SLAC National Accelerator Laboratory], Niccolai, S. [Université Paris-Saclay], Odian, A. [SLAC National Accelerator Laboratory], O’Dwyer, R. [Stanford University], Oriunno, M. [SLAC National Accelerator Laboratory], Osipenko, M. [INFN], Paremuzyan, R. [Thomas Jefferson National Accelerator Facility], Paul, S. [Florida International University], Peets, E. [Stanford University], Randazzo, N. [INFN], Raydo, B. [Thomas Jefferson National Accelerator Facility], Reese, B. [SLAC National Accelerator Laboratory], Rizzo, A. [Università di Roma Tor Vergata; INFN], Schuster, P. [SLAC National Accelerator Laboratory; Perimeter Institute], Sharabian, Y. G. [Thomas Jefferson National Accelerator Facility], Simi, G. [Università di Padova; INFN], Simonyan, A. [Université Paris-Saclay], Sipala, V. [Università di Sassari; INFN], Spellman, A. [University of California], Sokhan, D. [University of Glasgow], Solt, M. [SLAC National Accelerator Laboratory], Stepanyan, S. [Thomas Jefferson National Accelerator Facility], Szumila-Vance, H. [Florida International University], Tompkins, L. [Stanford University], Toro, N. [SLAC National Accelerator Laboratory; Perimeter Institute], Uemura, S. [SLAC National Accelerator Laboratory], Ungaro, M. [Thomas Jefferson National Accelerator Facility], Voskanyan, H. [Yerevan Physics Institute], Weinstein, L. B. [Old Dominion University], Wojtsekhowski, B. [Thomas Jefferson National Accelerator Facility]. 2026-02-24. First displaced vertex search for electroproduced dark-sector strongly interacting massive particles by the HPS experiment. https://doi.org/10.1103/2k3q-9mhj
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