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Flavor and Precision Physics exp ‘s

Flavor and Precision Physics exp ‘s. Bo s tjan Golob University of Ljubljana/ Jozef Stefan Institute also with. Introduction light sector ( m ‘s , K‘s ) p. 3 - 6 t ‘s p. 7 - 8 charm p. 9-11 beauty p. 12-20. “Jo z ef Stefan” Institute. University of Ljubljana.

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Flavor and Precision Physics exp ‘s

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  1. Flavor and Precision Physics exp‘s Bostjan Golob University of Ljubljana/ Jozef Stefan Institute alsowith Introduction lightsector (m‘s, K‘s) p.3 - 6 t‘s p.7 - 8 charm p. 9-11 beauty p. 12-20 “Jozef Stefan” Institute University of Ljubljana The 27th International Workshop on Weak Interactions and Neutrinos Bari 03 - 08 June 2019

  2. Introduction Flavourphysics SM Parameters (mn = 0): aEM, aQCD, qW3 Higgs l, v 2 quark & l masses 9 CKM 4 * MP: Mature Physics NP: New Physics Precision (particle) physics SM calculation / exp. meas‘s → within SM (MP*) determinationof param. → beyond SM (NP) limits on NP parameter space J. Haller et al., Eur. Phys. J. C78, 675 (2018) S. Fajfer, N. Košnik, PLB755, 270 (2016) BigBang Theory, CBS scientific advisor: Prof. David Saltzberg, UCLA EXP. SM

  3. LightSector CLFV Charged Lepton FlavorViolation MP NP EFT L: NP energy scale L >~O(104TeV) MEG II data acquisitonfrom 2020 in 3 years Br(m→eg)~O(10- 52) LXe MEG, PSI 3 108 m/s F. Feruglio et al., EPJ C75, 579 (2015) DC M. De Gerone, EPJ 73, 07002 (2014) Br(m→eg) < 4.2 10 -13 Brexp(m→eg) < 610 -14

  4. LightSector (g-2)m manomalousmagnetic moment MP NP E821 exp., BNL E989 Exp., FNAL: 4x better precision, new results expected this summer flavor violating part of NP operator: m→eg flavor conserving part of same operator: amNP s(am)/am~510-7 3.7s 7s Y.Kuno, EPPSU2019, may 2019 G.W. Bennet et al. (mg-2Coll.), PRD 73, 072003 (2006)

  5. Light Sector Kaons Kaonmixing, CPV indirect CPV (in mixing, mainlyK→ p l n): eK≠ 0 NP eK→ L>~O(104TeV); direct CPV (in decay, mainlyK→ p p): eK‘ ≠ 0 MP Re(eK‘/eK)=(16.4 1.9) 10-4 [Re(eK‘/eK)]SM=(15 7) 10-4 (5 2) 10-4 NP? KaonRaredecays talk by C. Biino KTeV (2004), KLOE (2006), NA48 (2007) 17 11 <300 (90% C.L) 3.0 0.3 Y. Nir, EPPSU2019, Granada, may2019 M. Sozzi, EPPSU2019, Granada, may2019 talk by K. Yamamoto KOTO @ J-PARC KL→ p0nn n g KTeV (2004), NA48 (2007) g CsI H. Gisbert, A. Pich, arXiv:1712.06147 n A.J. Buras, arXiv:1805.11096 KL(+6x n, 7x g ) bkg.: ninduced hadron clusters in CsI

  6. Light Sector Kaons Kaon Rare decays E949 exp. @ BNL Measurement is continued by NA62@CERN; To reach ~10% relative accuracy by ~2022 K+→ p+ nn A.V. Artamonov et al. (E949 Coll.), Phys. Rev. Lett. 101, 191802 (2008) 17 11 <300 (90% C.L) 3.0 0.3 M. Sozzi, EPPSU2019, Granada, may2019 KOTO @ J-PARC Used 2015 data This year new limit with 2016-18 data data taking still continuing KL→ p0nn M. Sozzi, EPPSU2019, Granada, may2019 talk by R. Lollini

  7. t leptons t Lepton Flavor Universality LFU is essential ingredient of SM many individual tests of NP xx : saturate uncertainty B‘(t  e n n): ALEPH@LEP tt : Belle@KEKB mt : BESIII@BEPCII A.Lusiani, EPPSU2019, may 2019 W - l= e-,m-,t - n gt/ gem=1.0020 ± 0.0013

  8. t leptons t Lepton Flavor Violation talk by C. Meaux talk by R. Venditti A.Lusiani, EPPSU2019, may 2019 CLEO Belle/BaBar Belle II/HL-LHC t  mg at e+e- t+t- backgrounds from e+e- m+m-g andt  mnn + noise g BrUL1/L t  3m at e+e- t+t- almost background free BrUL1/L

  9. Charm CPV Charmmixing & CP Violation mainplayers in heavyflavorstoday: LHCb @ LHC, Belle II @ SuperKEKB, BESIII @ BEPCII D0mixingestablished in 2007 by Belle & BaBar x=Dm/m, y=DG/2G CPV in charmsystemtiny lookingforNP sourcesof CPV talk by A. Rusov talk by R. Krishnakumar s ~ 3.7 GeV y(x)(D0D0, D+D-,…) L = 1033 cm-2 s-1 e- e+ mainlymeasurements byLHCb, Belle, BaBar A. Bevan, B. Golob, et al., ThePhysicsof B Factories, Springer (2014)

  10. Charm CPV Charmmixing & CP Violation CPV in decay: experimentallydemanding: ~ O(10-3)  systematicuncertainties tagging: D*+→ D0p+ talk by M. Martinelli R, Aaij et al. (LHCbColl.), arXiv:1903.08726 DACP=ACPK+K- - ACPp+p- taggingalso: B →D0m -X firstobservationof CPV in charm MP DACP=(-15.4 ± 2.9)  10-4 B.R. Ko et al. (Belle Coll.), PRL 109, 021601 (2012) ACPKSp+=(-36.3 ± 11.5)  10-4 K0asymm.

  11. Charm decays n Ds(ST) Charmdecays Ds+→ m+n BES III: s=4.178 GeV, e+e-→ DsDs* Ds* Ds talk by M. Rotondo m g, p0 Doubletaggedevent fDs=252.9 ± 3.7 ± 3.6 MeV or |Vcs|=0.985 ± 0.014 ± 0.014 (|Vcd/Vcs|=0.2191 ± 0.027 ± 0.009) fDsLQCD=249.9± 0.4 MeV A. Bazavov et al. (FermilabLatt.& MILC Coll.), PRD 98, 074512 (2018) |Vcd/Vcs|fit=0.23047 ± 0.00045 MP M. Tanabashi et al. (PDG), PRD 98, 030001 (2018) M. Ablikim et al. (BESIII Coll.), PRL 122, 071802 (2019)

  12. Beauty CPV B e- e+ Dz ~cbgtB ~ 200mm B Energy: TEST of Cabibbo-Kobayashi-Maskawa B-Factories, e+e-: BaBar (SLAC)/Belle (KEK)1999 – 2010 Belle II (KEK) 2018 – MS e+e-  q q, l+l - (q=u,d,s,c; l=e,m,t) √s=10.58 GeV U(4S) U(4S) n.b.: only to Dmd 32 measurements contribute! p(e-)=7GeV p(e+)=4GeV bg≠0

  13. Beauty CPV • TEST of Cabibbo-Kobayashi-Maskawa • joint analysis of Belle & BaBar data • 1.24 109BB pairs • B0  D0(KSp+p -) h0 • h0=p0,h,w • enables determination of cos2b • (not only sin2b as in B0  J/yKS ) Btag=B0 Btag=B0 mp+p-~ r(770) mKsp~ K*(892) cos2b =0.91± 0.22 ± 0.09 ± 0.07 (model) I. Adachi et al. (BaBar & Belle Coll.), PRL 121, 261801 (2018) B0 J/yKS (b  ccs) Belle: sS~0.03 Belle II: sS ~ 0.004

  14. Beauty CPV TEST of Cabibbo-Kobayashi-Maskawa LHCb @ LHC: measurement of bs in Bs J/yf R. Aaij et al. (LHCb Coll.), New J. Phys. 15 053021 (2013) Bs Dsp oscillations huge s(pp  ccX)=6 mb, s(pp  bbX)=0.3 mb detector acc. ~40% for Xb, Xc Si vertex det.: st ~50 fs LHCb Coll., LHCb-PAPER- 2019-013 (in preparation) DGs [ps-1] MS bs [rad]

  15. Beauty LFU TESTS of LFU in B decays; HL,T : form factorsparametrizing unknown QCD effects cancelationof some theoreticalandsyst. uncertainties b c W - l= e-, m-,t - u D(*)0 B- n R(D*)SM = 0.252 ±0.003 S.Fajfer et al., Phys.Rev.D85(2012) 094025 R(D)SM= 0.300 ±0.008 H. Na et al., Phys.Rev.D 92, 054410 (2015)

  16. Beauty LFU TESTS of LFU Br(B →Dln) ~ 2% problem? Btagreconstruction e+e-→ U(4S) → BtagBsig hfromBsig→hX; no extraenergy in calorim.; signalEECL~0; Btagreconstruction NeuroBayes, neuralnetwork erec~0,5% talk by M. Rozanska D(*)0 B- talk by S. Palestini neutrinos! (B →Dt(→ enent)nt) l=e-,m-,t - e+ n n BtagBsig e-

  17. Beauty LFU exampleofmeasurement talk by A. Passeri detected hadrons Btag Belle, PRD92, 072014(2015), 700 fb-1 e+ e- n Bsig K- D(*) p + l singlen Mmiss2=Mn2 0 Nsig=503 D* t n Nsig=320 D t n Nsig~ 3800 D* l n Nsig~ 3150 D ln systematicchecks: bkg‘sfromB  D** ( D* p )l n ; selectD* p l n decays checksofdistributions D**l n R(D)= 0.375±0.064±0.026 R(D*) = 0.293±0.038±0.015

  18. Beauty LFU combination od measurements last year‘ssituation new (most precise) meas. by Belle talk by J. Matias thisyear D*+l - average 4s SM A. Abdesselam et al. (BelleColl.), arXiv:1904.08794 R(D)= 0.307±0.037 ±0.016 R(D*) = 0.283±0.018 ±0.014 NP

  19. Beauty LFU l - B → K(*)l+ l - R(K(*))= B(B K(*)m+m-) / B(B K(*)e+e-) talk by J.G. Pardinas ql qK* B LHCbColl., LHCb-Paper-2019-009 p K* K l + K+e+e- RK=1 K+m+m- q2=m2(l + l -) NP

  20. Beauty anomalies l - angular distrib. B → K*m+ m- P5‘: one of ang. distr. variables w/ reduced th. uncertainty several b  smmprocesses Bs→ fm+ m- B0→ K0m+ m- ql LHCbColl., JHEP09 179 (2015) qK* B p K K* l + LHCbColl.,JHEP 06 133 (2014) NP LHCbColl., JHEP02 104 (2016) Belle Coll., PRL118 111801 (2017) Atlas Coll., JHEP10 047 (2018) CMS Coll., PLB781 517 (2018) new data from LHCb / Belle II being recorded as we speak

  21. Summary • Experim. flavor / precision phys. covering all generations of fermions • Looking for hints of NP scale also in view of the next large collider • At least one detector at such a collider to be able to perform flavor physics mesurements (PID,...) NP energy scale A. Crivellin, Corfu, Sep 2017 n.b.: coupling constants O(1)

  22. Beauty LFU A. Abdesselam et al. (BelleColl.), arXiv:1904.08794 Belle Semileptonictagging D*+l → D*0l → full NN range signal NN range NN: signal/normalization EECL: signal+normaliz. / bkg. fit: D(*)tn, D(*) l n, feeddownfromD(*)l (t)n, D**l (t)n, otherbkg., shapefrom MC

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