THE MTV EXPERIMENT FROM T-VIOLATION TO LORENTZ-VIOLATION. Jiro Murata Rikkyo University for the MTV collaboration INPC2016, Sydney, Sep 11-16, 2016

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1 THE MTV EXPERIMENT FROM T-VIOLATION TO LORENTZ-VIOLATION Jiro Murata Rikkyo Univrsity for th MTV collaboration INPC2016 Sydny Sp Rikkyo J. Murata Y. Nakaya Y. Totsuka S. Tanaka R. Tanuma T. Iguri E. Sitaibashi J. Onishi T. Toyoda M. Ikda R. Kishi K. Ninomiya S. Saiba Y. Sakamoto Y. Shimizu Tohoku-CYRIC H. Kawamura / RIKEN H. Baba Nagoya M. Yokohashi F. Goto M. Kitaguchi H. Shimizu TRIUMF J. Bhr M. Parson P. Lvy R. Opnshaw 1

2 Masurmnt = R-Corrlation Sarching P-odd & T-odd Nw Intraction Bta Dcay Rat Utilizing Analyzing Powr of Mott Scattring Rquird Componnts Production Pol. Nucli Masurmnt Elctron Momntum Masurmnt Elctron Trans. Pol. 2

3 MTV Run-II Prcision 2010 MTV xprimnt using MWDC at TRIUMF-ISAC 1 250M V-tracks AR = 7.5 ± 1.2stat. ± 6.5sys 104 Raching th highst lvl stat. prcision! Sam ordr systmatics du to dtctor asymmtry tc.

4 Nxt gnration dtctor : CDC Wir pitch 4mm To Rmov Systmatics : N-corrlation Asymmtric Accptanc Fak Tracking 4

5 Nxt gnration dtctor : CDC Wir pitch 4mm To Rmov Systmatics : N-corrlation Asymmtric Accptanc Fak Tracking 5

6 Gomtrical Systmatics Rduction Asymmtric Accptanc N-corrlation Asymmtric Gomtry Parity Violation = no fak signal Asymmtric Gomtry Parity Violation = non-zro signal Diffrnt Pattrn for R/N corrlation 6

7 MTV-CDC Anod 20µm Au-W 400 >> signal radout Cathod 100µm Au-Al 1000 >> applid voltag Shild 100µm Au-Al 400 >> shut down nois Fild 100µm Au-Al 400 >> applid voltag Dsignd in Fabricatd in 2011 Cll siz 4mm x 400 anod 10 mm x 104 anod MWDC High rat capability Larg and symmtric accptanc KEK

8 MTV-CDC TRIUMF

9 MTV-CDC commissioning 2011 : CDC installation 2012 : Full stup commissioning : Systmatics tst 2015 : Final tst with systmatic control Tanaka NIM A

10 CDC-Tracking Run-II MWDC Excllnt V-tracking significant improvmnt of vnt rliability! 10

11 MTV Run-II : First Physics Run wk data production in Nov First Physics Run 28G Lvl-1 / 3G Lvl-2 Triggr 2.5G vnts rcordd ~ 250M V-tracks sigmar~

12 MTV systmatics on Run-II Obsrvd Strang Asymmtry Run-II : Undrstood as Gain rduction du to spac charg ffct & Parity Violating Run-IV bta asymmtry Evaluation and Corrction using mixing ral data making artificial bta asymmtry dominant systmatic rror analyzing powr anti-symmtric xp A fak R A R = ± 1.2 ± stat. sys MTV Run-II FINAL! 12

13 Systmatics Calibration Robot Artificial Parity Violation Signal : Lft Run-II Right oscillation robot Moving at diffrnt frquncy Run-IV 13

14 FFT Amplitud of Asymmtry MTV2015 unpol Li-8 at 10 6 pps Systmatics Corrction Calibration Signal Obsrvd! 2M vnts/1 hour Run-II Robot Frquncy Run-IV Expctd PV fak pak x 6 14 Prcision ~ 1hour σ Asym ~ 1 N vnt ~ Frquncy [Hz] Systmatics ar undr control now! Asym R 0.1% prcision is xpctd Asym = 4x10-5 xpctd in 24 shifts Asym = 3.5x10-5 FSI prdiction

15 15 Run-II Run-IV N-Corrlation > < > < > < > < Ω ± = Ω Ω > < E p J J R E p J J m E p Q J J N G J J A E p E m b d de E E E p E Z F d de E J!!!!!!!!!!!! σ σ ξ π σ ω Non-zro N-corrlation : also usabl to chck analyzing powr

16 N-Corrlation Run-II R FSI ~ 0.07% currnt prcision N ~ 4% 10dg. Common Analyzing powr with R-corrlation : can b chckd by N-corrlation 16

17 Lorntz Violation Thoris of Quantum Gravity : Difficult to b dirctly tstd Rqusting violation of Lorntz symmtry : Tst of LV ~ QG Lorntz symmtry is not wll tstd in wak intraction LV lik P C T CP?? LV Data Tabl : 2016 Kostlcky v9 Wak LV propagator High Prcision tsts in 1970 s no spin corrlation Prfrrd Dirction in Univrs?? 17

18 Lorntz Violation I Run-II Sidral variation of upward/ downward anisotropy Run-IV pol Li-8 bam duration ~ wk KVI Na-22 xp Noordmans No Mott analyzing 18

19 Lorntz Violation II Run-II Sidral variation of lftward/ rightward Mott asymmtry Run-IV unpol Sr-Y 90 sourc duration ~ months 2013 Noordmans Sam as lctron momntum masurmnts? 19

20 Strong Gravity at Nuclar Scal V ' Yukawa = G Mm r r / λ [ 1 α ] atomic Casimir Murata-Tanaka CQG arxiv: < 10 um Gravity cannot obsrvd Stting Uppr Limits

21 Tools Summary: Expctd Physics from MTV A. Polarizd Li-8 production run ~ 2 wks RNLV B. Unpol Sr/Y-90 production run ~ 6 months LV C. Lft-Right oscillation robot to control PV-lik systmatics D. Rotational tabl to flip dtctor dirctions Physics 1. T-Violating R-corrlation : raching non-zro FSI prcision 2. nonzro Transvrs pol. from N-corrlation : 3. Tsts of Lorntz Invarianc in wak intraction & polarization corrlations FSI physics 1. Chck sign & Elctron Momntum Dpndnc Tst of SM 2. Systmatic Study ovr various Nucli R FSI N R 1 3 C Cʹ T T 8 Li Im C A 1 3 αzfm 21 p

22 MTV 2016

23 backup 23

24 2008 Tst Exprimnt at KEK-TRIAC 2008 First Proposal to EEC MTV xprimnt using MWDC 2010 EEC Progrss Rport 1 x10 7 pps x 11shifts 250M V-tracks S1183-MTV Activity Summary Sam ordr systmatics du to dtctor asymmtry CDC Commissioning 2012 EEC Progrss Rport CDC Systmatics Study Final Rsult : A R < 6 x 10-4 Systmatics du to PV undrstood! 2015 CDC Systmatics Calibration Systm Compltd Systmatics ar now wll undrstood and undr controlld only 6 shifts usd! Tst Rsult in 1hour : A R <~ 1 x EEC Progrss Rport A R ~ 10-5 prcision < FSI lvl 10 6 pps x 1212 shifts Physics Production 24

25 MTV on TV program! BS Fuji Galilo-X Nov

26 Scintific Amrican JAPANESE dition Book for young radrs blu backs 2011

27 Run-II rsult Systmatics : 1. Bam pol. Tilting N-corrlation 2. Dtctor asymmtry & PV bta asym. 3. Gain Rduction & PV bta asym. Evaluat & Corrct A R = ± 1.2 ± 6.5 stat. sys 10

28 Systmatics Calibration : xpctd signal Run-II Run-IV 28

29 Transvrs Polarization Masurmnt Utilizing Analyzing Powr of Mott Scattring UP/DOWN Asymmtry in Mott Scattring V-Track vnts

30 Rsults of KEK-TRIAC Exprimnt Asym R ~ < ε >< J > σ Asym σ R ~ < ε >< J > σ ~ 1 1 Asym = ~ 0. 2% N 1M σ vnt ffctiv analyzing powr polarization < ε >~ < J >~ % ~ 40% R = 40% prcision for 8% pol. 1.3x10 5 pps x 2days 37hours First Rsults from Rliabl Tracking Masurmnt! 30 H. Kawamura PhD Thsis 2010 Rikkyo-U

31 Systmatics I : N-corrlation Sourc = Tilting of bam polarization angl N-corrlation Dlta_α = [mrad.] FPOL Forward Polarimtr RN corrlation = ± 0.029% Axial-Symmtric dtctor is dsird

32 Systmatics II : Dtctor Asymmtry Sourc = Dtctor Asymmtry Parity Violation Spin up data Dtctor Asymmtry Effctiv Accptanc Asymmtric Accptanc Rsolvd in two dimnsional offlin analysis Symmtric dtctor is dsird

33 Systmatics-III : Accidntal fak V-track Mystrious asymmtry contradict with analyzing powr Undrstood in th CDC systmatics study α ε ε α ε ε = = D U ]1 [1 ]1 [1 1 ] [1 1 ] [1 ]1 [1 ]1 [1 1 ] [1 1 ] [ η α η α η α ε η α ε η α η α η α ε η α ε D PV D U PV U D PV D U PV U D U UD D PV D U PV U D PV D U PV U D U UD Asym t Asym t Asym t n Asym t n N N R Asym t Asym t Asym t n Asym t n N N R = = = = = = fficincy corrction function raw data analyzing powr anti-symmtric Trial of analytical canclation not succssful