# $\phi _{\boldsymbol ES}$ (${}^{8}\mathrm {B}$) INSPIRE search

${}^{8}\mathrm {B}$ solar-neutrino flux measured via ${{\mathit \nu}}{{\mathit e}}$ elastic scattering. This process is sensitive to all active neutrino flavors, but with reduced sensitivity to ${{\mathit \nu}_{{\mu}}}$, ${{\mathit \nu}_{{\tau}}}$ due to the cross-section difference, $\sigma\mathrm {( {{\mathit \nu}} _{{{\mathit \mu}}, {{\mathit \tau}}} {{\mathit e}} )}$ $\sim{}0.16\sigma\mathrm {( {{\mathit \nu}_{{e}}} {{\mathit e}} )}$. If the ${}^{8}\mathrm {B}$ solar-neutrino flux involves nonelectron flavor active neutrinos, their contribution to the flux is $\sim{}0.16$ times of ${{\mathit \nu}_{{e}}}$.

VALUE ($10^{6}$ cm${}^{-2}$s${}^{-1}$) DOCUMENT ID TECN  COMMENT
• • • We do not use the following data for averages, fits, limits, etc. • • •
$2.345$ $\pm0.014$ $\pm0.036$ 1
 2016 C
SKAM SK-I+II+III+IV average flux
$2.308$ $\pm0.020$ ${}^{+0.039}_{-0.040}$ 2
 2016 C
SKAM SK-IV average flux
$2.250$ ${}^{+0.030}_{-0.029}$ $\pm0.038$ 2
 2016 C
SKAM SK-IV day flux
$2.364$ $\pm0.029$ $\pm0.040$ 2
 2016 C
SKAM SK-IV night flux
$2.404$ $\pm0.039$ $\pm0.053$ 3
 2016 C
SKAM SK-III average flux
$2.41$ $\pm0.05$ ${}^{+0.16}_{-0.15}$ 4
 2011
SKAM SK-II average flux
$2.38$ $\pm0.02$ $\pm0.08$ 5
 2011
SKAM SK-I average flux
$2.77$ $\pm0.26$ $\pm0.32$ 6
 2011 B
KLND average flux
$2.4$ $\pm0.4$ $\pm0.1$ 7
 2010 A
BORX average flux
$1.77$ ${}^{+0.24}_{-0.21}$ ${}^{+0.09}_{-0.10}$ 8
 2008
SNO Phase III
$2.38$ $\pm0.05$ ${}^{+0.16}_{-0.15}$ 9
 2008
SKAM average flux
$2.35$ $\pm0.02$ $\pm0.08$ 10
 2006
SKAM average flux
$2.35$ $\pm0.22$ $\pm0.15$ 11
 2005 A
SNO Salty D$_{2}$O; ${}^{8}\mathrm {B}$ shape not constrained
$2.34$ $\pm0.23$ ${}^{+0.15}_{-0.14}$ 11
 2005 A
SNO Salty D$_{2}$O; ${}^{8}\mathrm {B}$ shape constrained
$2.39$ ${}^{+0.24}_{-0.23}$ $\pm0.12$ 12
 2002
SNO average flux
$2.39$ $\pm0.34$ ${}^{+0.16}_{-0.14}$ 13
 2001
SNO average flux
$2.80$ $\pm0.19$ $\pm0.33$ 14
 1996
KAMI average flux
$2.70$ $\pm0.27$ 14
 1996
KAMI day flux
$2.87$ ${}^{+0.27}_{-0.26}$ 14
 1996
KAMI night flux
1  ABE 2016C reports the combined results of the four phases of the Super-Kamiokande average flux measurements. Here the revised Super-Kamiokande-III result is used.
2  ABE 2016C reports the Super-Kamiokande-IV results for 1664 live days from September 2008 to February 2014. The analysis threshold is total electron energy of 4.0 MeV.
3  ABE 2016C revised the Super-Kamiokande-III average flux value reported in ABE 2011 . Super-Kamiokande-III results are for 548 live days from August 4, 2006 to August 18, 2008. The analysis threshold is 5.0 MeV, but the event sample in the $5.0 - 6.5$ MeV total electron energy range has a total live time of 298 days.
4  ABE 2011 recalculated the Super-Kamiokande-II results using ${}^{8}\mathrm {B}$ spectrum of WINTER 2006A.
5  ABE 2011 recalculated the Super-Kamiokande-I results using ${}^{8}\mathrm {B}$ spectrum of WINTER 2006A.
6  ABE 2011B use a 123 kton$\cdot{}$day exposure of the KamLAND liquid scintillation detector to measure the ${}^{8}\mathrm {B}$ solar neutrino flux. They utilize ${{\mathit \nu}}−{{\mathit e}}$ elastic scattering above a reconstructed-energy threshold of 5.5 MeV, corresponding to 5 MeV electron recoil energy. 299 electron recoil candidate events are reported, of which $157$ $\pm23.6$ are assigned to background.
7  BELLINI 2010A reports the Borexino result with 3 MeV energy threshold for scattered electrons. The data correspond to 345.3 live days with a target mass of 100 t, between July 15, 2007 and August 23, 2009.
8  AHARMIM 2008 reports the results from SNO Phase III measurement using an array of ${}^{3}\mathrm {He}$ proportional counters to measure the rate of NC interactions in heavy water, over the period between November 27, 2004 and November 28, 2006, corresponding to 385.17 live days. A simultaneous fit was made for the number of NC events detected by the proportional counters and the numbers of NC, CC, and ES events detected by the PMTs, where the spectral distributions of the ES and CC events were not constrained to the ${}^{8}\mathrm {B}$ shape.
9  CRAVENS 2008 reports the Super-Kamiokande-II results for 791 live days from December 2002 to October 2005. The photocathode coverage of the detector is 19$\%$ (reduced from 40$\%$ of that of Super-Kamiokande-I due to an accident in 2001). The analysis threshold for the average flux is 7 MeV.
10  HOSAKA 2006 reports the final results for 1496 live days with Super-Kamiokande-I between May 31, 1996 and July 15, 2001, and replace FUKUDA 2002 results. The analysis threshold is 5 MeV except for the first 280 live days (6.5 MeV).
11  AHARMIM 2005A measurements were made with dissolved NaCl (0.195$\%$ by weight) in heavy water over the period between July 26, 2001 and August 28, 2003, corresponding to 391.4 live days, and update AHMED 2004A. The $\mathit CC$, $\mathit ES$, and $\mathit NC$ events were statistically separated. In one method, the ${}^{8}\mathrm {B}$ energy spectrum was not constrained. In the other method, the constraint of an undistorted ${}^{8}\mathrm {B}$ energy spectrum was added for comparison with AHMAD 2002 results.
12  AHMAD 2002 reports the ${}^{8}\mathrm {B}$ solar-neutrino flux measured via ${{\mathit \nu}}{{\mathit e}}$ elastic scattering above the kinetic energy threshold of 5$~$MeV. The data correspond to 306.4 live days with SNO between November 2, 1999 and May 28, 2001, and updates AHMAD 2001 results.
13  AHMAD 2001 reports the ${}^{8}\mathrm {B}$ solar-neutrino flux measured via ${{\mathit \nu}}{{\mathit e}}$ elastic scattering above the kinetic energy threshold of $6.75$ MeV. The data correspond to 241 live days with SNO between November 2, 1999 and January 15, 2001.
14  FUKUDA 1996 results are for a total of 2079 live days with Kamiokande$~$II and III from January 1987 through February 1995, covering the entire solar cycle$~$22, with threshold E$_{{{\mathit e}}}>9.3~$MeV (first 449 days), $>7.5~$MeV (middle 794 days), and $>7.0~$MeV (last 836 days). These results update the HIRATA 1990 result for the average ${}^{8}\mathrm {B}$ solar-neutrino flux and HIRATA 1991 result for the day-night variation in the ${}^{8}\mathrm {B}$ solar-neutrino flux. The total data sample was also analyzed for short-term variations: within experimental errors, no strong correlation of the solar-neutrino flux with the sunspot numbers was found.
References:
 ABE 2016C
PR D94 052010 Solar Neutrino Measurements in Super-Kamiokande-IV
 ABE 2011B
PR C84 035804 Measurement of the ${}^{8}\mathrm {B}$ Solar Neutrino Flux with the KamLAND Liquid Scintillator Detector
 ABE 2011
 BELLINI 2010A
PR D82 033006 Measurement of the Solar ${}^{8}\mathrm {B}$ Neutrino Rate with a Liquid Scintillator Target and 3 MeV Energy Threshold in the Borexino Detector
 AHARMIM 2008
PRL 101 111301 Independent Measurement of the Total Active ${}^{8}\mathrm {B}$ Solar Neutrino Flux Using an Array of ${}^{3}\mathrm {He}$ Proportional Counters at the Sudbury Neutrino Observatory
 CRAVENS 2008
PR D78 032002 Solar Neutrino Measurements in Super-Kamiokande-II
 HOSAKA 2006
PR D73 112001 Solar Neutrino Measurements in Super-Kamiokande-I
 AHARMIM 2005A
PR C72 055502 Search for Periodicities in the ${}^{8}\mathrm {B}$ Solar Neutrino Flux Measured by the Sudbury Neutrino Observatory
PRL 89 011301 Direct Evidence for Neutrino Flavor Transformation from Neutral Current Interactions in the Sudbury Neutrino Observatory
PRL 87 071301 Measurement of Charged Current Interactions Produced by ${}^{8}\mathrm {B}$ Solar Neutrinos at the SUDBURY Neutrino Observatory
 FUKUDA 1996
PRL 77 1683 Solar Neutrino Data Covering Solar Cycle 22
 ABE 2011C
PRL 107 241801 Search for Differences in Oscillation Parameters for Atmospheric Neutrinos and Antineutrinos at Super-Kamiokande
 HIRATA 1990
PRL 65 1297 Results from One Thousand Days of Real Time Directional Solar Neutrino Data
 FUKUDA 2002
PL B539 179 Determination of Solar Neutrino Oscillation Parameters using 1496 Days of Super-Kamiokande I Data
 WINTER 2006A
PR C73 025503 The ${}^{8}\mathrm {B}$ Neutrino Spectrum
 AHMED 2004A
PRL 92 181301 Measurement of the Total Active ${}^{8}\mathrm {B}$ Solar Neutrino Flux at the Sudbury Neutrino Observatory with Enhanced Neutral Current Sensitivity