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تسجيل مستخدم جديدThe possibility to observe the non-standard interaction by the Hyperkamiokande atmospheric neutrino experiment
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It was suggested that a tension between the mass-squared differences obtained from the solar neutrino and KamLAND experiments can be solved by introducing the non-standard flavor-dependent interaction in neutrino propagation. In this paper we discuss the possibility to test such a hypothesis by atmospheric neutrino observations at the future Hyper-Kamiokande experiment. Assuming that the mass hierarchy is known, we find that the best-fit value from the solar neutrino and KamLAND data can be tested at more than 8 $sigma$, while the one from the global analysis can be examined at 5.0 $sigma$ (1.4 $sigma$) for the normal (inverted) mass hierarchy.
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In this talk we discuss the possibility to test the hypothesis, which has been proposed to explain the tension between the mass-squared differences of the solar neutrino and KamLAND experiments by the non-standard flavor-dependent interaction in neut
rino propagation, with the atmospheric neutrino observations at the future Hyper-Kamiokande experiment.
If the flavor dependent non-standard interactions (NSI) in neutrino propagation exist, then the matter effect is modified and the modification is parametrized by the dimensionless parameter $epsilon_{alphabeta}~(alpha,beta=e, mu, tau)$. In this paper
we discuss the sensitivity of the T2HKK experiment, whose possibility is now seriously discussed as a future extension of the T2K experiment, to such NSI. On the assumption that $epsilon_{alphamu}=0~(alpha=e, mutau)$ and $epsilon_{tautau}=|epsilon_{etau}|/(1+epsilon_{ee})$, which are satisfied by other experiments to a good approximation, we find that, among the possible off-axis flux configurations of $1.3^circ$, $1.5^circ$, $2.0^circ$ and $2.5^circ$, the case of the off-axis angle $1.3^circ$ gives the highest sensitivity to $epsilon_{ee}$ and $|epsilon_{etau}|$. Our results show that the $1.3^circ$ off-axis configuration can exclude NSI for $|epsilon_{ee}|gtrsim 1$ or $|epsilon_{etau}|gtrsim 0.2$ at 3$sigma$. We also find that in the presence of NSI, T2HKK (for the off-axis angle $1.3^circ$) has better sensitivity to the two CP phases ($delta_{CP}$ and arg($epsilon_{e tau}$)) than DUNE. This is because of the synergy between the two detectors i.e., one at Kamioka and one at Korea. T2HKK has better sensitivity to the CP phases than the atmospheric neutrino experiment at Hyperkamiokande in inverted hierarchy, but in normal hierarchy the atmospheric neutrino experiment has the best sensitivity to the CP phases.
In this work we study the the sensitivity of the T2HKK experiment to probe non-standard interaction in neutrino propagation. As this experiment will be statistically dominated due to its large detector volume and high beam-power, it is expected that
the sensitivity will be affected by systematics. This motivates us to study the effect of systematics in probing the non-standard interaction. We also compare our results with the other future proposed experiments i.e., T2HK, HK and DUNE.
We study the effects of non-standard interactions on the oscillation pattern of atmospheric neutrinos. We use neutrino oscillograms as our main tool to infer the role of non-standard interactions (NSI) parameters at the probability level in the energ
y range, $E in [1,20]$ GeV and zenith angle range, $cos theta in [-1,0]$. We compute the event rates for atmospheric neutrino events in presence of NSI parameters in the energy range $E in [1,10]$ GeV for two different detector configurations - a magnetized iron calorimeter and an unmagnetized liquid Argon time projection chamber which have different sensitivities to NSI parameters due to their complementary characteristics. As an application, we discuss how NSI parameter, $epsilon_{mutau}$ impacts the determination of the correct octant of $theta_{23}$.
We study non-standard interactions (NSIs) at reactor neutrino experiments, and in particular, the mimicking effects on theta_13. We present generic formulas for oscillation probabilities including NSIs from sources and detectors. Instructive mappings
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