This document was prepared by [CMS Collaboration] using the resources of the Fermi National Accelerator Laboratory (Fermilab), a U.S. Department of Energy, Office of Science, HEP User Facility. Fermilab is managed by Fermi Research Alliance, LLC (FRA), acting under Contract No. DE-AC02-07CH11359. HEAVY-FLAVOR SPECTROSCOPY IN ATLAS & CMS FERMILAB-SLIDES-19-016-CMS-E-PPD Greg Landsberg 54 th Rencontres de Moriond QCD, 26.03.2019 This document was prepared by [COLLABORATION NAME] using the resources of the Fermi National Accelerator Laboratory (Fermilab), a U.S. Department of Energy, Office of Science, HEP User Facility. Fermilab is managed by Fermi Research Alliance, LLC (FRA), acting under Contract No. DE- AC02-07CH11359.
Outline ๏ B → K* μμ angular analysis and Greg Landsberg - Heavy-Flavor Spectroscopy in ATLAS & CMS prospects ๏ CP Violation in the B s → J/ ψɸ decay ๏ Angular analysis of the B → J/ ψΛ p decay ๏ Spectroscopy of excited B s and B c mesons ๏ Conclusions ๏ N.B. All the references are clickable links 2
LHC Run 2: Big Success ๏ 160 fb -1 has been delivered by the LHC in Run 2 (2015 − 2018), Greg Landsberg - Heavy-Flavor Spectroscopy in ATLAS & CMS at a c.o.m. of 13 TeV, exceeding the original integrated luminosity projections ๏ Over 140 fb -1 of physics-quality data recorded by ATLAS/ CMS ๏ Thank you, LHC, for a spectacular run! � s = 13 TeV CMS ,ntegrDted LumLnoVLty DelLvered, SS, DDtD included fUom 2015-06-03 08:41 to 2018-10-26 08:23 8TC 100 100 2015, 4.2 fb − 1 7otDO ,nteJUDted LumLnosLty ( fb − 1 ) 2016, 41.0 fb − 1 2017, 49.8 fb − 1 2018, 68.2 fb − 1 80 80 60 60 40 40 20 20 0 0 1 0Dy 1 Jun 1 JuO 1 AuJ 1 6eS 1 2ct 1 1ov 1 Dec 3 DDte (87C)
B→K*µµ Angular Analysis
<latexit sha1_base64="zUY0u1/34kM808y+8r+pRlj3Cdw=">A hmYeJhmhDPMDbvwVNy4UcevenX9jpq2gogfu5XDOvST3WD6jQur6hzYzOze/sJhYSi6vrK6tpzY2G8ILOCZ17DGPtywkCKMuqUsqGWn5nCDHYqRpDU9jv3lLuKCe y1HPuk6qO9Sm2IklWSmdmtmcR8ew47NEQ6vzGIUdsQNl+GZeZExDlU/iCIzldazR5VSrlC elbXy0bOiEmuXMgXoKGUG kwRc1MvXd6Hg4c4krMkB tQ/dlN0RcUsxIlOwEgvgID1GftBV1kUNENx fE8E9pfSg7XFVroRj9ftGiBwhRo6lJh0kB+K3F4t/e 1A2pVuSF0/kMTFk4fsgEHpwTga2KOcYMlGi DMqforxAOkcpEqwKQK4etS+D9p5LJGPmtcFtLVk2kcCbANdkAG KAMquAc1EAdYHAH sATeNbutUftRXudjM5o050t8APa2ycihZpe</latexit> CDXicdVDLSgMxFM34rPV dekmWMW6sMz07UIoCuLCRUX7gLYMmT Angular Analysis B→K*µµ ๏ Recent ATLAS measurement, aimed at P' 5 and Greg Landsberg - Heavy-Flavor Spectroscopy in ATLAS & CMS other angular coe ffi cients φ K + µ + ★ Based on 2012 8 TeV data, 20 fb -1 B 0 θ K θ L d ★ Inspired by recent LHCb ~3.4 σ hint of µ − a discrepancy in P' 5 angular coe ffi cient π − ★ Possible connection to the b → s ℓ + ℓ - flavor anomalies " d 4 Γ 1 9 3 ( 1 − F L ) sin 2 θ K + F L cos 2 θ K + 1 − F L sin 2 θ K cos 2 θ L = d Γ / d q 2 d cos θ L d cos θ K d φ d q 2 32 π 4 4 − F L cos 2 θ K cos 2 θ L + S 3 sin 2 θ K sin 2 θ L cos 2 φ 5 ' P P' 5 2 LHCb + S 4 sin 2 θ K sin 2 θ L cos φ + S 5 sin 2 θ K sin θ L cos φ SM from DHMV 1 + S 6 sin 2 θ K cos θ L + S 7 sin 2 θ K sin θ L sin φ ~3.4 σ # 0 + S 8 sin 2 θ K sin 2 θ L sin φ + S 9 sin 2 θ K sin 2 θ L sin 2 φ (1) . -1 S 5 LHCb, JHEP 02 (2016) 104 P 0 5 = -2 p F L (1 − F L ) 0 5 10 15 5 2 2 4 q [GeV / c ]
Fit Projections ๏ Four-dimensional fits in the m(K* μμ ), ɸ , cos ϴ K , Greg Landsberg - Heavy-Flavor Spectroscopy in ATLAS & CMS and cos ϴ L variables 2 < q 2 < 4 GeV 2 Events / 25 MeV π -1 Events / 0.04 -1 ATLAS s = 8 TeV, 20.3 fb ATLAS s = 8 TeV, 20.3 fb Data 2 2 2 2 m(K* μμ ) S5 fold, q ∈ [2.0, 4.0] GeV S5 fold, q ∈ [2.0, 4.0] GeV 30 Total Fit Model Signal Background 20 ɸ Data ATLAS, JHEP 10 (2018) 047 Total Fit Model 20 Signal Background 10 10 0 0 5200 5400 5600 0 1 2 3 m [MeV] φ [rad] K π µ µ 30 Events / 0.08 Events / 0.04 -1 ATLAS s = 8 TeV, 20.3 fb -1 Data ATLAS s = 8 TeV, 20.3 fb Data S5 fold, q 2 [2.0, 4.0] GeV 2 2 2 Total Fit Model ∈ S5 fold, q ∈ [2.0, 4.0] GeV Total Fit Model Signal Signal Background Background cos ϴ K cos ϴ L 20 20 10 10 2012 0 0 1 0.5 0 0.5 1 0 0.2 0.4 0.6 0.8 1 − − cos 6 cos θ θ K L
Results vs. Theory ๏ P' 5 results are in agreement with other Greg Landsberg - Heavy-Flavor Spectroscopy in ATLAS & CMS experiments and theory in the q 2 < 6 GeV 2 range ★ Deviation from the DHMV predictions is 2.7 σ in the 4 < q 2 < 6 GeV 2 bin 1.8 L F -1 ATLAS s = 8 TeV, 20.3 fb F L 1.6 Data ATLAS, JHEP 10 (2018) 047 CFFMPSV fit 1.4 P '5 theory DHMV 1.2 theory JC 1 2012 0.8 0.6 0.4 0.2 0 0 2 4 6 8 10 2 q 2 [GeV ] 5 S -1 S 5 0.8 ATLAS s = 8 TeV, 20.3 fb Data 0.6 CFFMPSV fit theory DHMV 0.4 2012 2012 0.2 0 0.2 − DHMV: JHEP 12 (2014) 125 0.4 − JC: JHEP 05 (2013) 043, PRD 93 (2016) 014028 0.6 − 0 2 4 6 8 10 CFFMPSV: JHEP 06 (2016) 116 7 2 2 q [GeV ]
HL-LHC Projections ๏ Both ATLAS and CMS have CMS Greg Landsberg - Heavy-Flavor Spectroscopy in ATLAS & CMS − 1 Phase-2 Simulation Preliminary 300 fb (14 TeV) 0.5 0 *0 - CMS PLB 781 (2018) 517 P' + B → K µ µ 5 Run 3 projected for the HL-LHC with Stat. uncert. only with YR18 syst. uncert. 300 fb -1 0 ★ CMS also has Run 3 projections − 0.5 ATLAS: x5-9 improvement in precision, depending on 1 the trigger scenario (p Tµ > 6,6; 10,6; and 10,10 GeV) − 5 ATL-PHYS-PUB-2019-003 0 2 4 6 8 10 12 14 16 18 20 P' 2 ATLAS Preliminary 2 2 CMS PAS FTR-18-033 q [GeV ] ATLAS JHEP 10 (2018) 047 -1 s = 14 TeV, 3000 fb ojected statistical (hatched regions) and total (open boxes) uncertainties CFFMPSV fit Projections from Run 1 data CMS 1 Phase-2 Simulation Preliminary 3000 fb − (14 TeV) 1.5 B → K* µ µ theory DHMV 0.5 0 *0 - + CMS PLB 781 (2018) 517 B K theory JC P' → µ µ 5 ATLAS HL µ 10 µ 6 with Stat. uncert. only HL-LHC 1 ATLAS HL 10 6 (stat. only) µ µ with YR18 syst. uncert. 3 ab -1 0 p Tµ > 10,6 GeV 0.5 scenario 0 0.5 − 0.5 − − 1 1 − 0 2 4 6 8 10 0 2 4 6 8 10 12 14 16 18 20 unc. 0.1 Finer binning 2 2 q [GeV ] 0 0.1 − unc. 0 2 4 6 8 10 12 14 16 18 20 0.1 CMS: Up to x15 improvement w/ 3 ab -1 compared 0 − 0.1 to the 8 TeV CMS result [PLB 781 (2018) 517] 0 2 4 6 8 10 12 14 16 18 20 8 2 q 2 [GeV ]
CP Violation in the B s → J/ψ ɸ Decay
CP Violation in B s → J/ψ ɸ ๏ New analysis from ATLAS based on 2016+2017 13 TeV data (80.5 fb -1 ) Greg Landsberg - Heavy-Flavor Spectroscopy in ATLAS & CMS taken with a dimuon J/ ψ trigger, combined with an earlier 7+8 TeV result ★ The trigger has been corrected for the time-time-dependence of the e ffi ciency for muons with large displacement ๏ Use opposite-side tagging (based on a combination of the lepton and track-in-cone charge), calibrated with self-tagging B ± → J/ ψ K ± decays ★ A tagging e ffi ciency of ε = 14.7% with an e ff ective dilution of D = 33.4% and tagging power ε D 2 = 1.7% has been achieved ★ 3.2M Bs → J/ ψ ( μ + μ - ) ɸ (K + K - ) candidates, 0.5M remains after tagging ๏ A maximum likelihood fit to data with 9 parameters, including ɸ s , Γ s , ΔΓ s is performed -0.021 ±0.031 (HFLAV) − 0 . 076 ± 0 . 034 ( stat . ) ± 0 . 019 ( syst . ) rad φ s = 0 . 068 ± 0 . 004 ( stat . ) ± 0 . 003 ( syst . ) ps − 1 0.083 ±0.006 (PDG) ∆Γ s = 0 . 669 ± 0 . 001 ( stat . ) ± 0 . 001 ( syst . ) ps − 1 0.664 ±0.004 (PDG) Γ s = ATLAS-CONF-2019-009 10
ATLAS CPV Results ๏ The new data are consistent with an earlier ATLAS result Greg Landsberg - Heavy-Flavor Spectroscopy in ATLAS & CMS ๏ The results are consistent within 2 σ with the HFLAV/PDG world-average values for these parameters ★ A significant improvement in the precision in Γ s is achieved ๏ At 1 σ level the new result it is also consistent with the LHCb and CMS measurements ATLAS-CONF-2019-009 ] -1 [ps ATLAS Preliminary -1 0.14 7 and 8 TeV, 19.2 fb s Γ -1 s = 7, 8, and 13 TeV 13 TeV, 80.5 fb ∆ -1 68% CL contours Combined 19.2 + 80.5 fb 0.12 SM prediction 0.1 0.08 0.06 0.4 0.2 0 0.2 0.4 − − 11 φ [rad] s
Study of the B→J/ψΛp Decay
Baryonic B Decays ๏ B → J/ ψΛ p is a rare baryonic decay of the B + meson, observed in Greg Landsberg - Heavy-Flavor Spectroscopy in ATLAS & CMS 2005 by Belle with a handful (17.2 ± 4.1) of events: ★ B(B - → J/ ψΛ p) = (11.6 ± 2.8 +1.8-2.3 ) x 10 -6 ๏ Attempted to study the three two-body masses, but the results were inconclusive because of a low signal yield ๏ Historically, rich potential way of looking for new resonances: the X, Y particles were discovered in the B → J/ ψ + X decays ★ More recently LHCb saw two pentaquark Belle, PRD 72 (2005) 051105 Ent./7.3 MeV/c 2 14 (b) – B - → J/ ψΣ 0 p candidates (P +c ) in the Λ b → J/ ψ + X decays 12 8 8 8 10 Entries/10 MeV/c 2 – ) – ) 7 7 (a) M (J/ ψ , Λ ) 7 (b) M (J/ ψ ,p (c) M ( Λ ,p – 8 B - → J/ ψ Λ p 6 6 6 5 5 5 6 4 4 4 3 3 3 4 2 2 2 1 1 1 2 0 0 0 4.2 4.3 4 4.1 4.2 2 2.1 2.2 0 mass(GeV/c 2 ) 5.3 Belle, PRD 72 (2005) 051105 -0.1 -0.05 0 0.05 0.1 0.15 0.2 ∆ M B (GeV/c 2 ) 13
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