NSI with ANT ARES data N. R. Khan Chowdhury, T arak Thakore 1 - PowerPoint PPT Presentation

NSI with ANT ARES data N. R. Khan Chowdhury, T arak Thakore 1 12th Dec. 2019 | N. R. Khan Chowdhury | Weekly Meeting | IFIC |

ANT ARES Data ARES (2007-2016) dataset containing CC- ν 𝜈 events has been used in The official 10 years ANT this analysis. Binning: 8 Bins in log(E) ϵ [ 1.2, 2] times 17 Bins in cos θ ϵ [ 0.15, 1]. Underflow bin accounting for events with log(E) < 1.2 is not accounted anymore. log likelihood function: i , j ] + syst . [ N MC − 2 log ℒ old = 2 ∑ i , j − N data . logN MC i , j i , j N data [ N MC i , j ] + syst . i , j − 2 log ℒ new = 2 ∑ i , j − N data + N data . log i , j i , j N MC i , j 2 12th Dec. 2019 | N. R. Khan Chowdhury | Weekly Meeting | IFIC |

NSI limits with ANT ARES 90% CL limits in ϵ 𝜈𝝊 - ϵ 𝝊𝝊 phase space . Contour drawn w.r.t. to 𝜓 2min of phase space scanned for ANT ARES. BF points with DAT A BF for N at: 0.87656 BF for ϵ 𝜈𝜐 at: -0.00130138 BF for ϵ 𝜐𝜐 at: 0.032054 BF for 𝛦 m 232 at: 0.00306025 BF for θ 23 at: 51.0816 BF for ẟ CP at: 0 (Fixed) BF for θ 13 at: 8.41128 Wrong plot BF for 𝛿 at: -0.02123 BF for at: 0.994749 ν / ¯ ν BF for N 𝜈 at: 415 (Fixed) 𝜓 2 / d.of. : 131.851/ 128. 3 12th Dec. 2019 | N. R. Khan Chowdhury | Weekly Meeting | IFIC |

NSI limits with ANT ARES 90% CL limits in ϵ 𝜈𝝊 - ϵ 𝝊𝝊 phase space . Contour drawn w.r.t. to (0,0) for ANTARES. BF points with DAT A BF for N at: 0.87656 BF for ϵ 𝜈𝜐 at: -0.00130138 BF for ϵ 𝜐𝜐 at: 0.032054 BF for 𝛦 m 232 at: 0.00306025 BF for θ 23 at: 51.0816 BF for ẟ CP at: 0 (Fixed) BF for θ 13 at: 8.41128 Wrong plot BF for 𝛿 at: -0.02123 BF for at: 0.994749 ν / ¯ ν BF for N 𝜈 at: 415 (Fixed) 𝜓 2 / d.of. : 131.851/ 128. 4 12th Dec. 2019 | N. R. Khan Chowdhury | Weekly Meeting | IFIC |

NSI limits with ANT ARES 90% CL limits in ϵ 𝜈𝝊 - ϵ 𝝊𝝊 phase space . Contour drawn w.r.t. to BF (global minimum) for ANTARES. BF points with DAT A BF for N at: 0.87656 BF for ϵ 𝜈𝜐 at: -0.00130138 BF for ϵ 𝜐𝜐 at: 0.032054 BF for 𝛦 m 232 at: 0.00306025 BF for θ 23 at: 51.0816 BF for ẟ CP at: 0 (Fixed) BF for θ 13 at: 8.41128 BF for 𝛿 at: -0.02123 Right plot BF for at: 0.994749 ν / ¯ ν BF for N 𝜈 at: 415 (Fixed) 𝜓 2 / d.of. : 131.851/ 128. ϵ 𝜐𝜐 is fitted at a non-zero value, which is consistent with |U 𝜐 4 | 2 of the sterile analysis. 𝛦𝜓 2 = 𝜓 2 (0,0) - 𝜓 2 (BF) = 5.8. The non-NSI hypothesis is found at − 2 ∆ log L = 5.8 which corresponds to a 2-parameter p-value of 5.5%. 5 12th Dec. 2019 | N. R. Khan Chowdhury | Weekly Meeting | IFIC |

NSI limits for ϵ 𝜈𝝊 with ANT ARES Some of the systematics are turned off for brevity. BF points with DAT A BF for N at: 0.826628 BF for ϵ 𝜈𝜐 at: -0.00122 BF for ϵ 𝜐𝜐 at: 0. (Fixed) BF for 𝛦 m 232 at: 0.00204686 BF for θ 23 at: 46.5116 BF for ẟ CP at: 0 (Fixed) For IceCube analysis, the best fit is at ϵ 𝜈𝝊 = − 0.0005. BF for θ 13 at: 8.41 (Fixed) The 90% C.L. range is − 0.0067 < ϵ 𝜈𝝊 < 0.0081 BF for 𝛿 at: 0 (Fixed) ν / ¯ BF for at: 0.98529 ν BF for N 𝜈 at: 415 (Fixed) 𝜓 2 / d.of. : 128.09/ 128. 6 12th Dec. 2019 | N. R. Khan Chowdhury | Weekly Meeting | IFIC |

Summary Non-NSI hypothesis is discarded at 1.9 𝜏 for a 2 parameter NSI hypothesis. ARES can put stringent limits on ϵ 𝜈𝜐 compared to current limits. ANT A strong anti-correlation is found between 𝛦 m 232 and ϵ 𝜈𝜐 . (consistent with IceCube paper.) There is a marginal improvement while moving from sensitivities to limits in case of NSI parameter ϵ 𝜈𝜐 . The improvement can be attributed to the shallower minimum of the first oscillation dip in ANT ARES data. 7 12th Dec. 2019 | N. R. Khan Chowdhury | Weekly Meeting | IFIC |

Thanks 8 12th Dec. 2019 | N. R. Khan Chowdhury | Weekly Meeting | IFIC |

𝛦 m 232 - ϵ 𝜈𝝊 correlation Fitted values of 𝛦 m 232 as a function of test ϵ 𝜈𝝊 . NSI might mimic wrong values of 𝛦 m 232 . A prior 
 may be used for further analysis. ANT ARES might be missing the first oscillation 
 dip which could have constrained 𝛦 m 232 . 9 12th Dec. 2019 | N. R. Khan Chowdhury | Weekly Meeting | IFIC |

NSI limits with ANT ARES 90% CL limits in ϵ e 𝜈 - ϵ e 𝝊 phase space . 10 12th Dec. 2019 | N. R. Khan Chowdhury | Weekly Meeting | IFIC |

NSI limits with ANT ARES 90% CL limits in ϵ e 𝝊 - ϵ 𝝊𝝊 phase space . The island on the right plot will vanish if the likelihood landscape is smoothened/smeared. 11 12th Dec. 2019 | N. R. Khan Chowdhury | Weekly Meeting | IFIC |