Time-correlated coincidences at the sudbury neutrino observatory: An antineutrino search.

Format:

Book

Thesis/Dissertation

Author/Creator:

Shokair, Timothy Milad.

Contributor:

Williams, Hugh H., committee member.

Trodden, Mark, committee member.

Lande, K., committee member.

Klein, Joshua R., committee member.

Beier, Eugene W., advisor.

University of Pennsylvania. Physics and Astronomy.

Language:

English

Subjects (All):

Nuclear physics.

Astronomy.

Astrophysics.

Physics, Astrophysics.

Physics, Astronomy and Astrophysics.

Physics, Radiation.

0596.

0606.

0756.

Penn dissertations--Physics and astronomy.

Physics and astronomy--Penn dissertations.

Local Subjects:

Physics, Astrophysics.

Physics, Astronomy and Astrophysics.

Physics, Radiation.

Penn dissertations--Physics and astronomy.

Physics and astronomy--Penn dissertations.

0596.

0606.

0756.

Physical Description:

250 pages

Contained In:

Dissertation Abstracts International 74-06B(E).

System Details:

Mode of access: World Wide Web.

text file

Summary:

This dissertation presents a search for antineutrinos in all three phases of data from the Sudbury Neutrino Observatory. This work presents a new method for detecting time correlated coincidences in water detectors. There are two separate searches: an outside search for the inverse beta decay of antineutrinos on protons and an inside search for the inverse beta decay of antineutrinos on deuterons. The inside search found 3 antineutrino candidates in Phase I with an expected background of 3.83+0.71-0.72 events, 28 antineutrino candidates in Phase II with an expected background of 21.25+3.72-3.75 events, 4 antineutrino candidates in Phase III with an expected background of 6.06 ± 1.14 events. The outside search found 4 antineutrino candidates in Phase I with an expected background of 1.21+0.14-0.17 events, 8 antineutrino candidates in Phase II with an expected background of 9.77+1.06-1.34 events, 0 antineutrino candidates in Phase III with an expected background of 0.46 ± 0.29 events.

Including the expected contribution of antineutrinos from nuclear reactors after oscillations, a limit on the solar antineutrino flux is computed to be F8Bn&d1; ≤ 2.5 × 103 cm−2s −1. Taking the flux limit and the measured 8B solar neutrino flux, a limit on the neutrino to antineutrino conversion probability of P(ν → ν) ≤ 5.0 × 10−4. These limits are the best limits from a water detector.

Notes:

Thesis (Ph.D. in Physics and Astronomy) -- University of Pennsylvania, 2012.

Source: Dissertation Abstracts International, Volume: 74-06(E), Section: B.

Adviser: Eugene W. Beier.

Local Notes:

School code: 0175.

ISBN:

9781267894106

Access Restriction:

Restricted for use by site license.