Time-integrated CP violation in beauty at LHCb Moriond Electroweak - PowerPoint PPT Presentation

Time-integrated CP violation in beauty at LHCb Moriond Electroweak 2019 Emilie Bertholet on behalf of the LHCb collaboration

What am I going to talk about? Morion EW 2019 Emilie Bertholet (LPNHE, Paris) eberthol@cern.ch � 2

What am I going to talk about? CKM triangle measurements: Update of the LHCb combination of the CKM angle γ 1.5 1.5 1.5 excluded at CL > 0.95 excluded area has CL > 0.95 e excluded area has CL > 0.95 x c l u γ d γ e d a t 1.0 m & m C ∆ ∆ 1 1 L d s > ∆ m & ∆ m 0 sin2 β s d . 9 sin 2 β 5 m ∆ 0.5 d m 0.5 0.5 ∆ d ε α α K α ε K γ β η γ 0.0 β η η 0 0 α V /V V ub cb α ub + B → τ ν -0.5 -0.5 -0.5 ε K α ε γ K -1.0 -1 -1 CKM f i t t e r sol. w/ cos 2 β < 0 CKM (excl. at CL > 0.95) sol. w/ cos2 < 0 Summer 18 β f i t t e r (excl. at CL > 0.95) γ FPCP 2007 -1.5 -1.5 -1.5 -1.0 -0.5 0.0 0.5 1.0 1.5 2.0 -1 -1 -0.5 -0.5 0 0 0.5 0.5 1 1 1.5 1.5 2 2 ρ ρ ρ Morion EW 2019 Emilie Bertholet (LPNHE, Paris) eberthol@cern.ch 2

What am I going to talk about? Longitudinal Polarization Fraction in Charmless B Decays CKM triangle measurements: Update of the LHCb combination HFLAV 2 (1430) + φ K ∗ of the CKM angle γ May 2018 2 (1430) 0 φ K ∗ φ K 1 (1270) + Polarisation puzzle: B 0 →ρ 0 K*(892) 0 amplitude analysis φ K ∗ + LHCb φ K ∗ 0 Belle BABAR 2 (1430) 0 ω K ∗ Our Avg. 2 (1430) + ω K ∗ ω K ∗ + ω K ∗ 0 K ∗ 0 ρ + K ∗ 0 ρ 0 K ∗ + ρ 0 K ∗ + ρ − K K ∗ 0 K ∗ 0 a + 1 a − 1 ωρ + ρ 0 ρ 0 ρ + ρ 0 ρ + ρ − ppK ∗ 0 ppK ∗ + λλ K ∗ 0 K ∗ 0 e + e − 1.5 1.5 1.5 excluded at CL > 0.95 excluded area has CL > 0.95 e excluded area has CL > 0.95 x c l u γ d γ e d a t 1.0 0.0 0.7 1.4 m & m C ∆ ∆ 1 1 L d s > ∆ m & ∆ m f L 0 sin2 β s d . 9 sin 2 β 5 m ∆ 0.5 d m 0.5 0.5 ∆ d ε α α K α ε K γ β η γ 0.0 β η η 0 0 α V /V V ub cb α ub + B → τ ν -0.5 -0.5 -0.5 ε K α ε γ K -1.0 -1 -1 CKM f i t t e r sol. w/ cos 2 β < 0 CKM (excl. at CL > 0.95) sol. w/ cos2 < 0 Summer 18 β f i t t e r (excl. at CL > 0.95) γ FPCP 2007 -1.5 -1.5 -1.5 -1.0 -0.5 0.0 0.5 1.0 1.5 2.0 -1 -1 -0.5 -0.5 0 0 0.5 0.5 1 1 1.5 1.5 2 2 ρ ρ ρ Morion EW 2019 Emilie Bertholet (LPNHE, Paris) eberthol@cern.ch 2

What am I going to talk about? Longitudinal Polarization Fraction in Charmless B Decays CKM triangle measurements: Update of the LHCb combination HFLAV 2 (1430) + φ K ∗ of the CKM angle γ May 2018 2 (1430) 0 φ K ∗ φ K 1 (1270) + Polarisation puzzle: B 0 →ρ 0 K*(892) 0 amplitude analysis φ K ∗ + LHCb φ K ∗ 0 Large localised ACP in B to 3 hadrons modes : B ± →π ± K - K + Belle BABAR 2 (1430) 0 ω K ∗ Our Avg. Dalitz plot analysis 2 (1430) + ω K ∗ ω K ∗ + ω K ∗ 0 K ∗ 0 ρ + K ∗ 0 ρ 0 K ∗ + ρ 0 K ∗ + ρ − K K ∗ 0 K ∗ 0 a + B ± → K ± π + π − 1 a − 1 ωρ + ρ 0 ρ 0 ρ + ρ 0 ρ + ρ − ppK ∗ 0 ppK ∗ + B ± → K ± K + K − λλ K ∗ 0 K ∗ 0 e + e − 1.5 1.5 1.5 excluded at CL > 0.95 excluded area has CL > 0.95 e excluded area has CL > 0.95 x c l u γ d γ e d a t 1.0 0.0 0.7 1.4 m & m C ∆ ∆ 1 1 L d s > ∆ m & ∆ m f L 0 sin2 β s d . 9 sin 2 β 5 B ± → π ± K + K − m ∆ 0.5 d m 0.5 0.5 ∆ d ε α α K α ε K γ β η γ 0.0 β η η 0 0 α V /V V ub cb α ub + B → τ ν -0.5 -0.5 -0.5 ε K α ε γ K -1.0 B ± → π ± π + π − -1 -1 CKM f i t t e r sol. w/ cos 2 β < 0 CKM (excl. at CL > 0.95) sol. w/ cos2 < 0 Summer 18 β f i t t e r (excl. at CL > 0.95) γ FPCP 2007 -1.5 -1.5 -1.5 -1.0 -0.5 0.0 0.5 1.0 1.5 2.0 -1 -1 -0.5 -0.5 0 0 0.5 0.5 1 1 1.5 1.5 2 2 ρ ρ ρ Morion EW 2019 Emilie Bertholet (LPNHE, Paris) eberthol@cern.ch 2

What am I going to talk about? Longitudinal Polarization Fraction in Charmless B Decays CKM triangle measurements: Update of the LHCb combination HFLAV 2 (1430) + φ K ∗ of the CKM angle γ May 2018 2 (1430) 0 φ K ∗ φ K 1 (1270) + Polarisation puzzle: B 0 →ρ 0 K*(892) 0 amplitude analysis φ K ∗ + LHCb φ K ∗ 0 Large localised ACP in B to 3 hadrons modes : B ± →π ± K - K + Belle BABAR 2 (1430) 0 ω K ∗ Our Avg. Dalitz plot analysis 2 (1430) + ω K ∗ ω K ∗ + ACP in baryons: CP asymmetries in Λ b0 and Ξ b0 to phhh ω K ∗ 0 K ∗ 0 ρ + K ∗ 0 ρ 0 K ∗ + ρ 0 K ∗ + ρ − K K ∗ 0 K ∗ 0 a + B ± → K ± π + π − 1 a − 1 ωρ + ρ 0 ρ 0 ρ + ρ 0 ρ + ρ − ppK ∗ 0 ppK ∗ + B ± → K ± K + K − λλ K ∗ 0 K ∗ 0 e + e − 1.5 1.5 1.5 excluded at CL > 0.95 excluded area has CL > 0.95 e excluded area has CL > 0.95 x c l u γ d γ e d a t 1.0 0.0 0.7 1.4 m & m C ∆ ∆ 1 1 L d s > ∆ m & ∆ m f L 0 sin2 β s d . 9 sin 2 β 5 B ± → π ± K + K − m ∆ 0.5 d m 0.5 0.5 ∆ d ε α α K α ε K γ β η γ 0.0 β η η 0 0 α V /V V ub cb α ub + B → τ ν -0.5 -0.5 -0.5 ε K α ε γ K -1.0 B ± → π ± π + π − -1 -1 CKM f i t t e r sol. w/ cos 2 β < 0 CKM (excl. at CL > 0.95) sol. w/ cos2 < 0 Summer 18 β f i t t e r (excl. at CL > 0.95) γ FPCP 2007 -1.5 -1.5 -1.5 -1.0 -0.5 0.0 0.5 1.0 1.5 2.0 -1 -1 -0.5 -0.5 0 0 0.5 0.5 1 1 1.5 1.5 2 2 ρ ρ ρ Morion EW 2019 Emilie Bertholet (LPNHE, Paris) eberthol@cern.ch 2

Update of the LHCb combination of the CKM angle γ LHCb-CONF-2018-002

The CKM angle γ The angle γ can be measured from tree (SM benchmark) and loop decays (NP searches). γ from tree decays: B → Dh (h=K, K*, π , ππ ...) Interference between a b → c (favoured) and b → u (suppressed) transitions V ub V cb A sup ∝ V ub V cs A fav ∝ V cb V us where r is the ratio A sup γ = arg( − V ud V* of magnitudes ub B e δ Dh B ± γ = r Dh ) and δ is the strong V cd V* A fav phase difference cb Theoretically very clean Can be obtained via time-dependent or time-integrated methods (GLW, ADS...). Low branching ratios for those modes. ⇒ The best precision on γ is obtained by combining measurements from many decay modes. Morion EW 2019 Emilie Bertholet (LPNHE, Paris) eberthol@cern.ch 4

LHCb combination LHCb-CONF-2018-002 1 Strategy similar to previous combinations. CL LHCb − Frequentist treatment. 1 Preliminary 0.8 This combination includes new and updated measurements. 0.6 † 0.4 B decay D decay Method Ref. Dataset Status since last com- 68.3% bination [3] B + → DK + D → h + h � GLW [14] Run 1 & 2 Minor update 0.2 B + → DK + D → h + h � ADS [15] Run 1 As before 95.5% B + → DK + D → h + π � π + π � GLW/ADS [15] Run 1 As before 0 0 50 100 150 B + → DK + D → h + h � π 0 GLW/ADS [16] Run 1 As before [ ] γ ° 0 B decays B + → DK + D → K 0 S h + h � GGSZ [17] Run 1 As before s B + → DK + D → K 0 S h + h � 0 GGSZ [18] Run 2 New B decays B + → DK + D → K 0 S K + π � GLS [19] Run 1 As before + B decays B + → D ⇤ K + D → h + h � GLW [14] Run 1 & 2 Minor update Combination B + → DK ⇤ + D → h + h � GLW/ADS [20] Run 1 & 2 Updated results B + → DK ⇤ + D → h + π � π + π � GLW/ADS [20] Run 1 & 2 New 110 ) B + → DK + π + π � D → h + h � o GLW/ADS [21] Run 1 As before ( LHCb γ B 0 → DK ⇤ 0 100 D → K + π � ADS [22] Run 1 As before Preliminary B 0 → DK + π � D → h + h � GLW-Dalitz [23] Run 1 As before 90 B 0 → DK ⇤ 0 D → K 0 S π + π � GGSZ [24] Run 1 As before 80 B 0 s K ± D + s → h + h � π + s → D ⌥ TD [25] Run 1 Updated results B 0 → D ⌥ π ± D + → K + π � π + TD [26] Run 1 New 70 † − 1 60 Run 2 measurements were performed with an LHCb combination integrated luminosity of 2fb -1 @13TeV. 50 Analyses with the full 6fb -1 dataset still to come. 40 γ = (74.0 +5.0 − 5.8 ) ∘ 3 4 5 6 7 8 9 1 1 1 1 1 1 1 0 0 0 0 0 0 0 2 2 2 2 2 2 2 In agreement with world averages (CKMfitter, UTfit, HFLAV). Supersedes the previous LHCb measurement. Most precise determination of γ from a single experiment to date. Morion EW 2019 Emilie Bertholet (LPNHE, Paris) eberthol@cern.ch 5

First full amplitude analysis of this mode ! B 0 →ρ 0 K * (892) 0 amplitude analysis Run 1 data (3fb -1 ) arXiv:1812.07008