Progress in neutrino astronomy Rott, Carsten
Journal of the Korean Physical Society,
05/2021, Volume:
78, Issue:
10
Journal Article
Peer reviewed
Open access
The dream of observing our universe through neutrinos is rapidly becoming a reality. More than three decades after the first observation of neutrinos from beyond our solar system associated with ...Supernova SN1987A, neutrino astronomy is in the midst of a revolution. Extraterrestrial neutrinos are now routinely detected, following the discovery of a high-energy diffuse astrophysical neutrino flux in 2013. The detection of a high-energy neutrino in coincidence with a flaring blazar in 2017 has brought the field rapidly into the multi-messenger science era. The latest developments in the field of neutrino astronomy are reviewed and prospects with current and future detectors discussed. Particular emphasis is put on domestic programs in neutrino astronomy and the possibility to construct a large neutrino observatory in Korea.
New Dark Matter Search Strategies at DUNE Rott, Carsten; In, Seongjin; Kumar, Jason ...
Journal of physics. Conference series,
01/2020, Volume:
1342, Issue:
1
Journal Article
Peer reviewed
Open access
If dark matter annihilates to light quarks in the core of the Sun, then a flux of 236 MeV neutrinos will be produced from the decay of stopped kaons. We consider strategies for DUNE to not only ...observe such a signal, but to determine the direction of the neutrino from the hadronic recoil. We show that this novel strategy can provide a better handle on systematic uncertainties associated with dark matter searches.
A
bstract
We develop a general theoretical framework to analytically disentangle the contributions of the neutrino mass hierarchy, the atmospheric mixing angle, and the CP phase, in neutrino ...oscillations. To illustrate the usefulness of this framework, especially that it can serve as a complementary tool to neutrino oscillogram in the study of atmospheric neutrino oscillations, we take PINGU as an example and compute muon- and electron-like event rates with event cuts on neutrino energy and zenith angle. Under the assumption of exact measurement of neutrino momentum with a perfect e-
μ
identification and no background, we find that the PINGU experiment has the potential of resolving the neutrino mass hierarchy and the octant degeneracies within 1-year run, while the measurement of the CP phase is significantly more challenging. Our observation merits a serious study of the detector capability of estimating the neutrino momentum for both muon- and electron-like events.
Abstract
The JSNS
2
experiment will search for neutrino oscillations with Δm
2
≃ 1 eV
2
from
v
¯
μ
to
v
¯
e
, detected via the inverse beta decay (IBD) reaction
(
v
¯
e
+
p
→
e
+
+
n
)
and tagged via ...gammas from neutron capture on Gadolinium. A 3 GeV 1 MW proton beam incident on a mercury target at the Materials and Life Science Experimental Facility at J-PARC produces an intense neutrino flux from muon decay at rest
(
μ
+
→
e
+
+
v
¯
μ
+
v
e
)
. The first of two 50 tons liquid scintillator detectors is nearly completed and will be located at a distance of 24 m from the neutrino source. JSNS
2
can directly test the LSND anomaly and is expected to start taking data in early 2020.
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