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SUMMARY:Probing Pion-Nucleon and Proton-Nucleon Production Channels for Mi
 llicharged Particles in the SuperFGD Detector at T2K
DTSTART;VALUE=DATE-TIME:20261028T063000Z
DTEND;VALUE=DATE-TIME:20261028T064500Z
DTSTAMP;VALUE=DATE-TIME:20261102T062523Z
UID:indico-contribution-6234@cern.ch
DESCRIPTION:Speakers: Nikita Mashin ()\nThe T2K experiment uses a high-int
 ensity muon neutrino beam produced at the J-PARC accelerator facility to s
 tudy neutrino properties and search for physics beyond the Standard Model.
  Recently\, the near detector ND280 was upgraded with a high-performance s
 cintillator detector\, the SuperFGD. Composed of approximately 2 million 1
  cm³ scintillator cubes read out by wavelength-shifting (WLS) fibers in t
 hree dimensions\, the SuperFGD enables improved 3D tracking of stopping pr
 otons and pions\, enhanced electron/photon separation\, and neutron detect
 ion. This makes the SuperFGD sensitive to feebly interacting exotic partic
 les. In this study\, we investigate the potential of the detector to obser
 ve millicharged particles (mCPs) with masses up to several GeV\, as predic
 ted by various hidden-sector models.\n\nPrevious studies have primarily fo
 cused on mCP production from neutral unflavoured mesons\, while this work 
 extends the production model to include additional hadronic channels. We e
 valuate the contribution of mCPs generated through charged pion-nucleon sc
 attering and elastic proton-neutron scattering within the target material.
  These production mechanisms may constitute a non-negligible source of mCP
 s at T2K energies. Using realistic performance characteristics of the Supe
 rFGD\, we estimate the expected signal rates for the topology of double co
 nsecutive scatterings of mCPs on atomic electrons. The study will provide 
 an assessment of how pion-nucleon and proton-neutron processes extend the 
 detector's sensitivity in the (mass\, millicharge) parameter space.\n\nhtt
 ps://indico.particle.mephi.ru/event/626/contributions/6234/
LOCATION: Conference Hall 4
URL:https://indico.particle.mephi.ru/event/626/contributions/6234/
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