MicroBooNE

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MicroBooNE is a liquid argon time projection chamber (LArTPC) at Fermilab in Batavia, Illinois. It is located in the Booster Neutrino Beam (BNB) beamline where neutrinos are produced by colliding protons from Fermilab's booster-accelerator to a beryllium target; this produces many short-lived particles that decay into neutrinos. The neutrinos then pass through solid ground (to filter out particles that are not neutrinos from the beam) through another experiment called ANNIE (under construction as of 2018), then solid ground, then through the Short Baseline Near Detector (, in construction, expected to begin operation 2022), then ground again and arrive at the MicroBooNE detector 470 meters downrange from the target. After MicroBooNE the neutrinos continue to MiniBooNE detector and to the ICARUS detector.

MicroBooNE's two main physics goals are to investigate the MiniBooNE low-energy excess and neutrino-argon cross sections.[1][2] As part of the Short Baseline Neutrino program (SBN), it will be one of a series of neutrino detectors along with the new Short-Baseline Near Detector (SBND) and moved ICARUS detector.

MicroBooNE was filled with argon in July 2015 and began data taking.[3] The collaboration announced that they had found evidence of the experiment's first neutrino interactions in November 2015.[4] As of 2020, the detector was operating.[5]

In October 2021 the results of the first three years of operation were reported. Two analyses examined the MiniBooNE low-energy excess, one under a single photon hypothesis[6][7] and the other under an electron hypothesis.[8][9] No evidence for either of these explanations was found.

References[]

  1. ^ "MicroBooNE Physics". MicroBooNE website. Fermilab. Archived from the original on 2017-12-22. Retrieved 2016-05-31.
  2. ^ R. Acciarri, et al. (The MicroBooNE Collaboration) (February 2017). "Design and construction of the MicroBooNE detector". Journal of Instrumentation. 12 (2): P02017. arXiv:1612.05824. Bibcode:2017JInst..12P2017A. doi:10.1088/1748-0221/12/02/P02017. S2CID 119212111.
  3. ^ "The short-baseline detectives and the mysterious case of the sterile neutrino". ScienceDaily. Retrieved 2015-08-11.
  4. ^ "MicroBooNE sees first accelerator-born neutrinos". Symmetry. Retrieved 2016-05-31.
  5. ^ "Short-Baseline Neutrino Program (SBN)". sbn.fnal.gov. Fermilab .
  6. ^ Collaboration, MicroBooNE; Abratenko, P.; An, R.; Anthony, J.; Arellano, L.; Asaadi, J.; Ashkenazi, A.; Balasubramanian, S.; Baller, B.; Barnes, C.; Barr, G. (2021-10-01). "Search for Neutrino-Induced Neutral Current $\Delta$ Radiative Decay in MicroBooNE and a First Test of the MiniBooNE Low Energy Excess Under a Single-Photon Hypothesis". {{cite journal}}: Cite journal requires |journal= (help)
  7. ^ "New results from MicroBooNE shine light on a long-standing anomaly in particle physics". discover.lanl.gov. Retrieved 2021-10-28.
  8. ^ "Search for an Excess of Electron Neutrino Interactions in MicroBooNE Using Multiple Final State Topologies". MicroBooNE. Retrieved 2021-10-28.
  9. ^ "MicroBooNE experiment's first results show no hint of a sterile neutrino". News. 2021-10-27. Retrieved 2021-10-28.

External links[]

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