Precision measurement of mixing angles and cp
Download
1 / 36

Precision measurement of mixing angles and CP - PowerPoint PPT Presentation


  • 47 Views
  • Uploaded on

Precision measurement of mixing angles and CP. Hisakazu Minakata PUC-Rio. PUC-Rio, where?. Maracana. n a = U a i n i. All the angles are measured !lepton CP phase d left. SK-atm+MINOS+T2K. T2K-MINOS-DC-DB-RENO. solar+KamLAND. q 12.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'Precision measurement of mixing angles and CP' - lucita


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript

Puc rio where
PUC-Rio, where?

Maracana

RENO50@KNRC-Seoul


All the angles are measured lepton cp phase d left

na=Uaini

All the angles are measured !lepton CP phase d left

SK-atm+MINOS+T2K

T2K-MINOS-DC-DB-RENO

solar+KamLAND

RENO50@KNRC-Seoul


Precision measurement of mixing angles and cp
q12

RENO50@KNRC-Seoul


Q 12 has been measured by solar and kamland experiments
q12 has been measured by solar and KamLAND experiments

KamLAND Mar. 2013

RENO50@KNRC-Seoul


Precision measurement of mixing angles and cp
q12

  • sin2q12 = 0.304 +/- 0.013

  • Error of sin2q12 = 4.3%

  • Error of Dm221 = 2.4%

KamLAND Mar.2013

RENO50@KNRC-Seoul


How to improve q 12
How to improve q12?

RENO50@KNRC-Seoul


Sado idea proposal july 2004
SADO idea/proposal (July 2004)

  • “SADO” = Several tens of km AntineutrinoDetectOr

  • Basic idea: 1st oscillation minima of Pee is the right place for precision measurement of q12

HM-Nunokawa-Teves-ZukanovichFunchal,

ArXiv 0407326 PRD(2005)

RENO50@KNRC-Seoul


Optimal distance estimated as 50 60 km
Optimal distance estimated as 50-60 km

Without geo-nu 40km would be fine

RENO50@KNRC-Seoul


Sado vs kamland sensitivity
SADO-vsKamLAND sensitivity

SADO 3s sensitivity ~ KamLAND 1s sensitivity

RENO50@KNRC-Seoul


Solar kamland and sado are good competitors
Solar+KamLANDand SADO are good competitors

2% (1s) in sin2q12 reachable with systematic error of 4%

  • Tuned reactor may have better sensitivity with long-run because tuning L is powerful

Bahcall-Pena-Garay

Slide at World Physics Summit @Galapagos, June 22-25, 2006

RENO50@KNRC-Seoul


Quark lepton complementarity
Quark-Lepton Complementarity

QLC is based on observation: q12 + qC = p/4

Bi-maximal mixing from neutrinos

HM-A.Smirnov PRD 2004

Predicted value ofq13in this model agrees well with experiments ! Large q13 natural in QLC

RENO50@KNRC-Seoul


Impressive to see the real proposals today
Impressive to see the real proposals today!

Daya Bay II

Sin2q12 error:

RENO ~ 1% (K.K.Joo)

Daya Bay II 0.63% claimed! (Yifang Wang), Talk both at ICRR)

RENO50@KNRC-Seoul


Precision measurement of mixing angles and cp
q13

RENO50@KNRC-Seoul


Q 13 reno
q13:RENO

  • If added quadrature, sin22q13 = 0.1 +/- 0.018

  • sin2q13 = 0.0257 +/- 0.0048

  • Error of sin2q13 = 19%

RENO50@KNRC-Seoul


Q 13 daya bay
q13:Daya Bay

  • If added quadrature, sin22q13 = 0.089 +/- 0.011

  • sin2q13 = 0.0228 +/- 0.0029

  • Error of sin2q13 = 13%

RENO50@KNRC-Seoul


How to improve q 13
How to improve q13?

  • Continued running of reactor experiments

  • Can accelerator measurement supersade reactor q13 accuracy? If yes, when?

  • What is the ultimate error of q13 ?

  • If sin22q13 = 0.1 +/- 0.005 5% error for sin2q13

  • Is 2-3% error achievable for sin2q13 ?

  • Neutrino factory?

  • Reactor + identical 2 detector appears to be practically the best way

Memory of Lev Mikaelyan @ Kurchatov Inst.

RENO50@KNRC-Seoul


Ultimate error of q 13
Ultimate error of q13?

D(sin2q) / sin2q = (1.6-2.0) (Dq / q)

P. Coloma etal. JHEP12

DayaBay ultimate (syst. only)

RENO50@KNRC-Seoul


Least accurately measured angle q 23
Least accurately measured angle q23

RENO50@KNRC-Seoul


Q 23 mixing angle with the largest error of 10 20 level
q23: mixing angle with the largest error of 10-20% level

Conchaetal. JHEP 2012

RENO50@KNRC-Seoul


Error of q 23 is large because
Error of q23 is large because ..

  • Jacobian effect:

  • Octant degeneracy + exp. uncertainty  merging of clone solution to true one

HM-Sonoyama-Sugiyama PRD 2004 

RENO50@KNRC-Seoul


How to measure q 23 accurately
How to measure q23 accurately?

RENO50@KNRC-Seoul


Use solar term or r a to solve q 23 octant degeneracy
Use solar term or R+A to solve q23 octant degeneracy

Hiraideetal. PRD2006

d=0 assumed

T2K-II + phase II reactor

T2KK

sin2 2q13

T2KK 2s

(rough)

> 3s

2~3s

sin2 2q13

hep-ph/0601258

T2KK has better sensitivity

at sin2 2q13 < 0.06~0.07 .

Kajitaetal. PRD2007

RENO50@KNRC-Seoul

sin2 q23


Use atmospheric neutrino to probe solar n oscillation
Use atmospheric neutrino to probe solar n oscillation

Hyper-K LOI : ArXiv 1109.3262

Barger etal. PRL 2012

RENO50@KNRC-Seoul


Toward measuring d
Toward measuring d

RENO50@KNRC-Seoul


How to measure cp
How to measure CP

  • nmsuperbeam appears to be the prime candidate

  • T2KK CP sensitivity ~ T2HK CP sensitivity

RENO50@KNRC-Seoul


Determination of d in correlation with q 13
Determination of d in correlation with q13?

  • So far CP d measurement has been discussed in a framework of simultaneous d – q13 determination  intrinsic d - q13 degeneracy enriched with unknown mass hierarchy

  • Right framework? NO! Better setting: simultaneous d – q23 determination

People were focused on another cosmos ..

RENO50@KNRC-Seoul


Why q 23 relevant for cp
Why q23 relevant for CP?

  • In precision era for CP the errors of d will be dominated by uncertainty of s223

  • D sind =

  • D cosd =

Error formula for CP dh = order unity

HM-Parke, ArXiv 1303.6178

For a given set of (P, P-bar) with finite error, a change in s223 can be compensated by adjusting d

RENO50@KNRC-Seoul


A new method for q 23 and d
A new method for q23 and d

RENO50@KNRC-Seoul


Simultaneous q 23 d determination
Simultaneous q23– d determination

What you need is to switch q13 q23 everything goes through as in (q13-d) case

For a given set of (P, P-bar) there are 2x2=4 solutions of q23 and d

RENO50@KNRC-Seoul


1 st oscillation maximum
1st Oscillation maximum

Things are much simpler in oscillation maximum

RENO50@KNRC-Seoul


1 st oscillation maximum continued
1st Oscillation maximum (continued)

HM-Parke, ArXiv 1303.6178

RENO50@KNRC-Seoul


Use n e appearance channel
Use ne appearance channel

  • simultaneous d – q23 determination by ne and ne-bar appearance channels

  • q23 intrinsic degeneracy

RENO50@KNRC-Seoul


Breaking q 23 d degeneracy
Breaking q23– d degeneracy

At 1st VOM

Spectrum information must solve the degeneracy!

Off 1st VOM

RENO50@KNRC-Seoul

Hyper-K: DE= +/- 10%:

LBNE: DE= +/- 20%:


2 nd vacuum oscillation maximum
2nd vacuum oscillation maximum

At 2nd VOM, D=3p/2

DE= +/- 3%:

Movement of clone solution is more prominent at 2nd VOM

RENO50@KNRC-Seoul


Conclusion
Conclusion

  • Current status of mixing angle measurement outlined

  • Some ideas seeking for better precision discussed

  • Further improvement appear realistic for q12(new projects) and q13 (continue running), but may not be for q23 at near maximal, because…

  • Fortunately, if you measure d, then you automatically get q23!

RENO50@KNRC-Seoul