Solar neutrino oscillation parameters after first KamLAND results (vol 67, art no 073002, 2003)

被引：31

作者：

Fogli, GL

Lisi, E

Marrone, A

Montanino, D

Palazzo, A

Rotunno, AM

机构：

[1] Univ Bari, Dipartimento Fis, I-70126 Bari, Italy

[2] Ist Nazl Fis Nucl, Sez Bari, I-70126 Bari, Italy

[3] Univ Lecce, Dipartimento Sci Mat, I-73100 Lecce, Italy

[4] Ist Nazl Fis Nucl, Sez Lecce, I-73100 Lecce, Italy

来源：

PHYSICAL REVIEW D | 2004年 / 69卷 / 01期

关键词：

D O I：

10.1103/PhysRevD.69.017301

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

In a previous paper, we presented a three-flavor oscillation analysis of the solar neutrino measurements and of the first data from the KamLAND experiment, in terms of the relevant mass-mixing parameters (deltam(2),theta(12),theta(13)). The analysis, performed by including the terrestrial neutrino constraints coming from the CHOOZ (reactor), KEK-to-Kamioka (K2K, accelerator), and Super-Kamiokande (SK, atmospheric) experiments, provided a stringent upper limit on theta(13), namely, sin(2)theta(13)<0.05 at 3sigma. We reexamine such an upper bound in light of a recent (although preliminary) reanalysis of atmospheric neutrino data performed by the SK Collaboration, which seems to shift the preferred value of the largest neutrino square mass difference Deltam(2) downwards. By taking the results of the SK official reanalysis at face value, and by repeating the analysis of our previous paper with such new input, we find that the upper bound on theta(13) is somewhat relaxed: sin(2)theta(13)<0.067 at 3sigma. Related phenomenological issues are briefly discussed.

引用

页数：3

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