by
DrShaofeng Ge
(Tsung-Dao Lee Institute, Shanghai)
→
Asia/Shanghai
B326 (IHEP)
B326
IHEP
Description
Abstract: The leptonic Dirac CP phase has profound physical
consequences due to its connection with leptogenesis for explaining
the existence of matter in the Universe. To some extent, the leptonic
CP phase is even more important than the Higgs boson that provide mass
for all fundamental particles. If we cannot understand the existence
of matter, why we need to care about their mass.
I will first review the status of CP measurement and then introduce a
new proposal with muon decay at rest (muDAR). Currently, accelerator
neutrino experiments such as T2K, NOvA, and DUNE are the most
promising for CP measurement. Nevertheless, they suffer from several
problems of degeneracy, efficiency, sensitivity, and new physics such
as non-unitarity mixing (NUM) and (vector, scalar, dark) non-standard
interactions (NSI). The situation can be improved by adding a muon
decay at rest (muDAR) source. With T2(H)K running in neutrino mode and
muDAR in anti-neutrino mode, both using the same detector, the CP
measurement becomes more precise can break the degeneracy between
\delta and 180^o - \delta. Most importantly, muDAR can guarantee the
CP sensitivity against NUM and NSI. The same configuration can also
apply to next-generation medium baseline reactor neutrino experiments
like JUNO and RENO-50, enhancing their physics potential from just
mass hierarchy to also CP. With only one source and no extra
detectors, this dessign is much better than DAEdLAS which requires 3
sources, but only 20% duty factor and 4 times higher luminosity for
each.
葛韶锋博士，2002-2006年清华物理系本科，毕业时获叶企孙奖；2006-2012年清华高能物理中心博士，2009年在美国德克萨斯州立大学奥斯汀分校联合培养。2012-2014年获日本学术振兴会（JSPS）学者在日本高能加速器研究机构（KEK）、2014-2017年在德国海德堡马普所MPIK从事理论研究。2017年至今获美国加州大学伯克利分校和日本东京大学Kavli
IPMU联合聘请，担任项目研究员；2017年获美国费米国家加速器实验室（Fermilab）中微子中心学者奖、并受邀于2018年夏天访问研究三个月。获聘上海交通大学李政道研究所，任李政道青年学者。主要研究领域为中微子、暗物质、对撞机物理的理论与唯象研究。共发表文章30篇，其中三篇PRL。
Refs:
Jarah Evslin, SFG, Kaoru Hagiwara, JHEP 1602 (2016) 137 [arXiv:1506.05023]
SFG, Pedro Pasquini, Mariam Tortola, Jose W.F. Valle, Phys.Rev. D95
(2017) no.3, 033005 [arXiv:1605.01670]
SFG, Alexei Smirnov, JHEP 1610 (2016) 138 [arXiv:1607.08513]
SFG, NuPhys 2016 [arXiv:1704.08518]
SFG, Stephen Parke, accepted by PRL [arXiv:1812.08376]
SFG, Hitoshi Murayama [arXiv:1904.02518]