Osc SNS Home Page
Filed in: Main.Osc SNS Home Page · Modified on : Wed, 05 Jun 13
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'''There exists a need to address and resolve the growing evidence for short-baseline neutrino
oscillations and the possible existence of sterile neutrinos.''' Such non-standard particles, first invoked
to:
There exists a need to address and resolve the growing evidence for short-baseline neutrino
oscillations and the possible existence of sterile neutrinos. Such non-standard particles, first invoked
Changed lines 1-2 from:
There exists a need to address and resolve the growing evidence for short-baseline neutrino
oscillations and the possible existence of sterile neutrinos. Such non-standard particles, first invoked
to:
'''There exists a need to address and resolve the growing evidence for short-baseline neutrino
oscillations and the possible existence of sterile neutrinos.''' Such non-standard particles, first invoked
Changed lines 1-4 from:
The Spallation Neutron Source (SNS), located at Oak Ridge National Laboratory, will be coming online over the next few years and will herald a new era in neutron research. In addition to providing fluxes of high-intensity neutrons, the SNS will also be a prodigious source of neutrinos from π'^+^' and μ'^+^' decay at rest. This neutrino beam can be used for high-precision neutrino oscillation experiments. The neutrino flux from the SNS is known extremely well and includes anti-ν'_μ_' and ν'_e_' from μ'^+^' decay at rest, as well as the 30 [= MeV =] mono-energetic ν'_μ_' from π'^+^' decay at rest. The mono-energetic ν'_μ_' can be used to test for the existence of light sterile neutrinos via the neutral-current reaction ν'_μ_' C → ν'_μ_' C'^*^'(15.11). An oscillation or suppression of this reaction would be direct evidence for sterile neutrinos.
The [= OscSNS =] detector is based on the [= LSND =] and [= MiniBooNE =] detectors and can be built for ~ $12M (or ~ $8M if the [= MiniBooNE =] oil and phototubes are reused and ~ $5M if the tank size is reduced). [= OscSNS =] will achieve the world's best neutrino oscillation sensitivities for anti-ν'_μ_' → anti-ν'_e_' oscillations, ν'_μ_' → ν'_e_' oscillations, and ν'_μ_' → ν'_X_' oscillations at a Δm'^2^' scale of > ~0.1 eV'^2^'. In addition, [= OscSNS =] can make the world's best measurements of ν'_e_' e → ν'_e_' e elastic scattering and ν'_e_' C → e'^-^' N charged-current scattering.
to:
There exists a need to address and resolve the growing evidence for short-baseline neutrino
oscillations and the possible existence of sterile neutrinos. Such non-standard particles, first invoked
to explain the LSND νµ → νe appearance signal, would require a mass of ∼ 1 eV/c2 , far above the mass
scale associated with active neutrinos. More recently, the [= MiniBooNE =] experiment has reported a 2.8σ excess
of events in antineutrino mode that is consistent with neutrino oscillations and with the LSND antineutrino
appearance signal. [= MiniBooNE =] has also observed a 3.4σ excess of events in their neutrino mode data.
In addition, lower than expected neutrino-induced event rates from calibrated radioactive sources and
nuclear reactors can be explained by the existence of sterile neutrinos. Fits to the world’s neutrino and
antineutrino data are consistent with sterile neutrinos at this ∼ 1 eV/c2 mass scale, although there is some
tension between measurements from disappearance and appearance experiments. The existence of
these sterile neutrinos will impact design and planning for next generation neutrino experiments. It should
be conclusively established whether such totally unexpected light sterile neutrinos exist. The Spallation
Neutron Source (SNS) at Oak Ridge National Laboratory, built to usher in a new era in
neutron research, provides a unique opportunity for US science to perform a definitive search
for sterile neutrinos.
The 1.4 MW beam power of the SNS is a prodigious source of neutrinos from the decay of π + and µ+ at
rest. These decays produce a well specified flux of neutrinos via π + → µ+ νµ , τπ = 2.7×10−8 s, and µ+ → e+
νe νµ , τµ = 2.2 × 10−6 s. The low duty factor of the SNS (∼ 695 ns beam pulses at 60 Hz, DF = 4.2 × 10−5)
is more than 1000 times less than that found at LAMPF. This smaller duty factor provides a reduction in
backgrounds due to cosmic rays, and allows the νµ induced events from π + decay to be separated from the
νe and νµ induced events from µ+ decay.
The [= OscSNS =] experiment will make use of this prodigious source of neutrinos. The [= OscSNS =] detector will
be centered at a location 60 meters from the SNS target, in the backward direction. The cylindrical detector
design is based upon the LSND and [= MiniBooNE =] detectors and will consist of an 800-ton tank of mineral oil
with a small concentration of b-PBD scintillator dissolved in the oil, that is covered by approximately 3500
8-inch phototubes for a photocathode coverage of 25%. The cylindrical design will allow us to map the event
rates as a function of L/E, to look for any sinusoidal dependence indicative of oscillations.
This experiment will use the monoenergetic 29.8 [= MeV =] νµ to investigate the existence of light sterile
neutrinos via the neutral-current reaction νµ C → νµ C ∗ (15.11 [= MeV =]). This reaction has the same cross section
for all active neutrinos, but is zero for sterile neutrinos. An observed oscillation in this reaction is direct
evidence for sterile neutrinos. [= OscSNS =] can also carry out an unique and decisive test of the LSND νµ → νe¯
appearance signal. In addition, [= OscSNS =] can make a sensitive search for νe disappearance by searching for
oscillations in the reaction νe C → e− Ngs , where the Ngs is identified by its beta decay. It is important to
note that all of the cross sections involved are known to two percent or better.
The SNS represents a unique opportunity to pursue a strong neutrino physics program in a cost-effective
manner, as an intense flux of neutrinos from stopped π + and µ+ decay are produced during normal SNS
operations. The existence of light sterile neutrinos would be the first major extension of the Standard Model.
Sterile neutrino properties are central to dark matter, cosmology, astrophysics, and future neutrino research.
The [= OscSNS =] experiment would be able to prove whether sterile neutrinos can explain these
existing short-baseline anomalies.
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[[SNS Facilities]]
[[OscSNS Physics]]
[[OscSNS Detector]]
[[Contact]]
[[Internal]]
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The [= OscSNS =] detector is based on the [= LSND =] and [= MiniBooNE =] detectors and can be built for ~ $12M (or ~ $8M if the [= MiniBooNE =] oil and phototubes are reused and ~ $5M if the tank size is reduced). [= OscSNS =] will achieve the world's best neutrino oscillation sensitivities for anti-ν'_μ_' → anti-ν'_e_' oscillations, ν'_μ_' → ν'_e_' oscillations, and ν'_μ_' → ν'_X_' oscillations at a Δm'^2^' scale of > ~0.1 eV'^2^'. In addition, [= OscSNS =] can make the world's best measurements of ν'_e_' e $rarr; ν'_e_' e elastic scattering and ν'_e_' C $rarr; e'^-^' N charged-current scattering.
to:
The [= OscSNS =] detector is based on the [= LSND =] and [= MiniBooNE =] detectors and can be built for ~ $12M (or ~ $8M if the [= MiniBooNE =] oil and phototubes are reused and ~ $5M if the tank size is reduced). [= OscSNS =] will achieve the world's best neutrino oscillation sensitivities for anti-ν'_μ_' → anti-ν'_e_' oscillations, ν'_μ_' → ν'_e_' oscillations, and ν'_μ_' → ν'_X_' oscillations at a Δm'^2^' scale of > ~0.1 eV'^2^'. In addition, [= OscSNS =] can make the world's best measurements of ν'_e_' e → ν'_e_' e elastic scattering and ν'_e_' C → e'^-^' N charged-current scattering.
Changed lines 1-4 from:
The Spallation Neutron Source (SNS), located at Oak Ridge National Laboratory, will be coming online over the next few years and will herald a new era in neutron research. In addition to providing fluxes of high-intensity neutrons, the SNS will also be a prodigious source of neutrinos from π'^+^' and μ'^+^' decay at rest. This neutrino beam can be used for high-precision neutrino oscillation experiments. The neutrino flux from the SNS is known extremely well and includes anti-ν'_μ_' and ν'_e_' from μ'^+^' decay at rest, as well as the 30 MeV mono-energetic ν'_μ_' from π'^+^' decay at rest. The mono-energetic ν'_μ_' can be used to test for the existence of light sterile neutrinos via the neutral-current reaction ν'_μ_' C → ν'_μ_' C'^*^'(15.11). An oscillation or suppression of this reaction would be direct evidence for sterile neutrinos.
The OscSNS detector is based on the LSND and MiniBooNE detectors and can be built for ~ $12M (or ~ $8M if the MiniBooNE oil and phototubes are reused and ~ $5M if the tank size is reduced). OscSNS will achieve the world's best neutrino oscillation sensitivities for anti-ν'_μ_' → anti-ν'_e_' oscillations, ν'_μ_' → ν'_e_' oscillations, and ν'_μ_' → ν'_X_' oscillations at a Δm'^2^' scale of > ~0.1 eV'^2^'. In addition, OscSNS can make the world's best measurements of ν'_e_' e $rarr; ν'_e_' e elastic scattering and ν'_e_' C $rarr; e'^-^' N charged-current scattering.
to:
The Spallation Neutron Source (SNS), located at Oak Ridge National Laboratory, will be coming online over the next few years and will herald a new era in neutron research. In addition to providing fluxes of high-intensity neutrons, the SNS will also be a prodigious source of neutrinos from π'^+^' and μ'^+^' decay at rest. This neutrino beam can be used for high-precision neutrino oscillation experiments. The neutrino flux from the SNS is known extremely well and includes anti-ν'_μ_' and ν'_e_' from μ'^+^' decay at rest, as well as the 30 [= MeV =] mono-energetic ν'_μ_' from π'^+^' decay at rest. The mono-energetic ν'_μ_' can be used to test for the existence of light sterile neutrinos via the neutral-current reaction ν'_μ_' C → ν'_μ_' C'^*^'(15.11). An oscillation or suppression of this reaction would be direct evidence for sterile neutrinos.
The [= OscSNS =] detector is based on the [= LSND =] and [= MiniBooNE =] detectors and can be built for ~ $12M (or ~ $8M if the [= MiniBooNE =] oil and phototubes are reused and ~ $5M if the tank size is reduced). [= OscSNS =] will achieve the world's best neutrino oscillation sensitivities for anti-ν'_μ_' → anti-ν'_e_' oscillations, ν'_μ_' → ν'_e_' oscillations, and ν'_μ_' → ν'_X_' oscillations at a Δm'^2^' scale of > ~0.1 eV'^2^'. In addition, [= OscSNS =] can make the world's best measurements of ν'_e_' e $rarr; ν'_e_' e elastic scattering and ν'_e_' C $rarr; e'^-^' N charged-current scattering.
Changed lines 4-7 from:
The OscSNS detector is based on the LSND and MiniBooNE detectors and can be built for ~ $12M (or ~ $8M if the MiniBooNE oil and phototubes are reused and ~ $5M if the tank size is reduced). OscSNS will achieve the world's best neutrino oscillation sensitivities for anti-ν'_μ_' → anti-ν'_e_'oscillations, ν'_μ_' → ν'_e_'oscillations, and ν'_μ_' → ν'_X_'oscillations at a δm'^2^' scale of > ~0.1 eV'^2^'. In addition, OscSNS
can make the world’s best measurements of ν<sub>e</sub>e → ν<sub>e</sub>e
elastic scattering and
ν<sub>e</sub>C → e-N charged-current scattering.
to:
The OscSNS detector is based on the LSND and MiniBooNE detectors and can be built for ~ $12M (or ~ $8M if the MiniBooNE oil and phototubes are reused and ~ $5M if the tank size is reduced). OscSNS will achieve the world's best neutrino oscillation sensitivities for anti-ν'_μ_' → anti-ν'_e_' oscillations, ν'_μ_' → ν'_e_' oscillations, and ν'_μ_' → ν'_X_' oscillations at a Δm'^2^' scale of > ~0.1 eV'^2^'. In addition, OscSNS can make the world's best measurements of ν'_e_' e $rarr; ν'_e_' e elastic scattering and ν'_e_' C $rarr; e'^-^' N charged-current scattering.
Changed lines 1-15 from:
The Spallation Neutron Source (SNS), located at Oak Ridge National Laboratory, will be coming online over the next few years and will herald a new era in neutron research. In addition to providing fluxes of high-intensity neutrons, the SNS will also be a prodigious source of neutrinos from π'^+^' and μ'^+^' decay at rest. This neutrino beam can be used for high-precision neutrino oscillation experiments. The neutrino flux from the SNS is known extremely well and includes anti-ν'_μ_' and ν'_e_' from μ'^+^' decay at rest, as well as the 30 MeV mono-energetic ν'_μ_' from π'^+^' decay at rest. The mono-energetic ν<sub>μ</sub> can be used to test for the existence of light sterile
neutrinos via the neutral-current reaction ν<sub>μ</sub> C → ν<sub>μ</sub>C*
(15.11). An oscillation
or suppression of this reaction would be direct evidence for sterile neutrinos.
The OscSNS detector is based on the LSND and MiniBooNE detectors and can
be built for ~ $12M (or ~ $8M if the MiniBooNE oil and phototubes are reused
and ~ $5M if the tank size is reduced). OscSNS will achieve the world's best
neutrino oscillation sensitivities for anti-ν<sub>μ</sub> → anti-ν<sub>e</sub>
oscillations, ν<sub>μ</sub> → ν<sub>e</sub> oscillations,
and ν<sub>μ</sub> → ν<sub>x</sub> oscillations at a Δ m<sup>2</sup>
scale of > ~ 0.1eV<sup>2</sup>. In addition, OscSNS
to:
The Spallation Neutron Source (SNS), located at Oak Ridge National Laboratory, will be coming online over the next few years and will herald a new era in neutron research. In addition to providing fluxes of high-intensity neutrons, the SNS will also be a prodigious source of neutrinos from π'^+^' and μ'^+^' decay at rest. This neutrino beam can be used for high-precision neutrino oscillation experiments. The neutrino flux from the SNS is known extremely well and includes anti-ν'_μ_' and ν'_e_' from μ'^+^' decay at rest, as well as the 30 MeV mono-energetic ν'_μ_' from π'^+^' decay at rest. The mono-energetic ν'_μ_' can be used to test for the existence of light sterile neutrinos via the neutral-current reaction ν'_μ_' C → ν'_μ_' C'^*^'(15.11). An oscillation or suppression of this reaction would be direct evidence for sterile neutrinos.
The OscSNS detector is based on the LSND and MiniBooNE detectors and can be built for ~ $12M (or ~ $8M if the MiniBooNE oil and phototubes are reused and ~ $5M if the tank size is reduced). OscSNS will achieve the world's best neutrino oscillation sensitivities for anti-ν'_μ_' → anti-ν'_e_'oscillations, ν'_μ_' → ν'_e_'oscillations, and ν'_μ_' → ν'_X_'oscillations at a δm'^2^' scale of > ~0.1 eV'^2^'. In addition, OscSNS
Changed lines 1-8 from:
The Spallation Neutron Source (SNS), located at Oak Ridge National Laboratory, will be coming online over the next few years and will herald a new era in neutron research. In addition to providing fluxes of high-intensity neutrons, the SNS will also be a prodigious source of neutrinos from π'^+^' and μ+ decay at rest. This neutrino beam can be used for high-precision neutrino oscillation experiments. The
neutrino flux from the SNS is known extremely well and includes anti-#x03BD<sub>μ</sub>
and ν<sub>e</sub> from
μ<sup>+</sup> decay at rest, as well as the 30 MeV mono-energetic ν<sub>μ</sub>
from π<sup>+</sup> decay at
rest. The mono-energetic ν<sub>μ</sub> can be used to test for the existence of light sterile
to:
The Spallation Neutron Source (SNS), located at Oak Ridge National Laboratory, will be coming online over the next few years and will herald a new era in neutron research. In addition to providing fluxes of high-intensity neutrons, the SNS will also be a prodigious source of neutrinos from π'^+^' and μ'^+^' decay at rest. This neutrino beam can be used for high-precision neutrino oscillation experiments. The neutrino flux from the SNS is known extremely well and includes anti-ν'_μ_' and ν'_e_' from μ'^+^' decay at rest, as well as the 30 MeV mono-energetic ν'_μ_' from π'^+^' decay at rest. The mono-energetic ν<sub>μ</sub> can be used to test for the existence of light sterile
Changed lines 1-3 from:
The Spallation Neutron Source (SNS), located at Oak Ridge National Laboratory, will be coming online over the next few years and will herald a new era in neutron research. In addition to providing fluxes of high-intensity neutrons, the SNS will also be a prodigious source of neutrinos from π<sup>+</sup> and μ<sup>+</sup> decay at rest. This neutrino beam can be used for high-precision neutrino oscillation experiments. The
to:
The Spallation Neutron Source (SNS), located at Oak Ridge National Laboratory, will be coming online over the next few years and will herald a new era in neutron research. In addition to providing fluxes of high-intensity neutrons, the SNS will also be a prodigious source of neutrinos from π'^+^' and μ+ decay at rest. This neutrino beam can be used for high-precision neutrino oscillation experiments. The
Changed lines 1-6 from:
The Spallation Neutron Source (SNS), located at Oak Ridge National Laboratory,
will be coming online over the next few years and will herald a new era in neutron
research. In addition to providing fluxes of high-intensity neutrons, the SNS will
also be a prodigious source of neutrinos from π<sup>+</sup>
and μ<sup>+</sup> decay at rest. This neutrino beam can be used for
high-precision neutrino oscillation experiments. The
to:
The Spallation Neutron Source (SNS), located at Oak Ridge National Laboratory, will be coming online over the next few years and will herald a new era in neutron research. In addition to providing fluxes of high-intensity neutrons, the SNS will also be a prodigious source of neutrinos from π<sup>+</sup> and μ<sup>+</sup> decay at rest. This neutrino beam can be used for high-precision neutrino oscillation experiments. The
Added lines 1-28:
The Spallation Neutron Source (SNS), located at Oak Ridge National Laboratory,
will be coming online over the next few years and will herald a new era in neutron
research. In addition to providing fluxes of high-intensity neutrons, the SNS will
also be a prodigious source of neutrinos from π<sup>+</sup>
and μ<sup>+</sup> decay at rest. This neutrino beam can be used for
high-precision neutrino oscillation experiments. The
neutrino flux from the SNS is known extremely well and includes anti-ν<sub>μ</sub>
and ν<sub>e</sub> from
μ<sup>+</sup> decay at rest, as well as the 30 MeV mono-energetic ν<sub>μ</sub>
from π<sup>+</sup> decay at
rest. The mono-energetic ν<sub>μ</sub> can be used to test for the existence of light sterile
neutrinos via the neutral-current reaction ν<sub>μ</sub> C → ν<sub>μ</sub>C*
(15.11). An oscillation
or suppression of this reaction would be direct evidence for sterile neutrinos.
The OscSNS detector is based on the LSND and MiniBooNE detectors and can
be built for ~ $12M (or ~ $8M if the MiniBooNE oil and phototubes are reused
and ~ $5M if the tank size is reduced). OscSNS will achieve the world's best
neutrino oscillation sensitivities for anti-ν<sub>μ</sub> → anti-ν<sub>e</sub>
oscillations, ν<sub>μ</sub> → ν<sub>e</sub> oscillations,
and ν<sub>μ</sub> → ν<sub>x</sub> oscillations at a Δ m<sup>2</sup>
scale of > ~ 0.1eV<sup>2</sup>. In addition, OscSNS
can make the world’s best measurements of ν<sub>e</sub>e → ν<sub>e</sub>e
elastic scattering and
ν<sub>e</sub>C → e-N charged-current scattering.
Added lines 1-10:
[[SNS Facilities]]
[[OscSNS Physics]]
[[OscSNS Detector]]
[[Contact]]
[[Internal]]