A Letter of Intent to Build a MiniBooNE Near Detector: BooNE
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- Univ. of Alabama, Birmingham, AL (United States)
- Argonne National Laboratory (ANL), Argonne, IL (United States)
- Embry-Riddle Aeronautical University, Daytona Beach, FL (United States)
- Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
- Univ. of Florida, Gainesville, FL (United States)
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Louisiana State Univ., Baton Rouge, LA (United States)
- Central Michigan Univ., Mount Pleasant, MI (United States)
- Universidad Nacional Autnoma de Mexico (Mexico)
There is accumulating evidence for a difference between neutrino and antineutrino oscillations at the $$\sim 1$$ eV$^2$ scale. The MiniBooNE experiment observes an unexplained excess of electron-like events at low energies in neutrino mode, which may be due, for example, to either a neutral current radiative interaction, sterile neutrino decay, or to neutrino oscillations involving sterile neutrinos and which may be related to the LSND signal. No excess of electron-like events ($$-0.5 \pm 7.8 \pm 8.7$$), however, is observed so far at low energies in antineutrino mode. Furthermore, global 3+1 and 3+2 sterile neutrino fits to the world neutrino and antineutrino data suggest a difference between neutrinos and antineutrinos with significant ($$\sin^22\theta_{\mu \mu} \sim 35%$$) $$\bar \nu_\mu$$ disappearance. In order to test whether the low-energy excess is due to neutrino oscillations and whether there is a difference between $$\nu_\mu$$ and $$\bar \nu_\mu$$ disappearance, we propose building a second MiniBooNE detector at (or moving the existing MiniBooNE detector to) a distance of $$\sim 200$$ m from the Booster Neutrino Beam (BNB) production target. With identical detectors at different distances, most of the systematic errors will cancel when taking a ratio of events in the two detectors, as the neutrino flux varies as $1/r^2$ to a calculable approximation. This will allow sensitive tests of oscillations for both $$\nu_e$$ and $$\bar \nu_e$$ appearance and $$\nu_\mu$$ and $$\bar \nu_\mu$$ disappearance. Furthermore, a comparison between oscillations in neutrino mode and antineutrino mode will allow a sensitive search for CP and CPT violation in the lepton sector at short baseline ($$\Delta m^2 > 0.1$$ eV$^2$).
- Research Organization:
- Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), High Energy Physics (HEP)
- DOE Contract Number:
- AC02-07CH11359;
- OSTI ID:
- 3019615
- Report Number(s):
- FERMILAB-LOI--2009-02; oai:inspirehep.net:833934; arXiv:0910.2698
- Country of Publication:
- United States
- Language:
- English
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