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21 Dec 2004B-fysica. NIKHEF jaarvergadering, Niels Tuning1/53 B-physics Overview NIKHEF Jaarvergadering Nijmegen 21-22 December 2004 Niels Tuning on behalf.

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Presentation on theme: "21 Dec 2004B-fysica. NIKHEF jaarvergadering, Niels Tuning1/53 B-physics Overview NIKHEF Jaarvergadering Nijmegen 21-22 December 2004 Niels Tuning on behalf."— Presentation transcript:

1 21 Dec 2004B-fysica. NIKHEF jaarvergadering, Niels Tuning1/53 B-physics Overview NIKHEF Jaarvergadering Nijmegen December 2004 Niels Tuning on behalf of the B-physics group

2 21 Dec 2004B-fysica. NIKHEF jaarvergadering, Niels Tuning2/53 LHCb: migration of people… Graduated last Friday!  Niels van Bakel:  Sander Klous almost… New job in Lausanne!:  Jeroen van Hunen Visiting engineering student from China:  Senlong Shao New AIO/OIOs:  Aras Papadelis  Edwin Bos Visiting physicists:  Yuri Gouz  Seva Souvorov New postdocs:  Eduardo Rodrigues (based at CERN)  Me NWO Mozaiek grant  Besma M’Charek Niels Aras Seva “ The Silicon Vertex Detector for LHCb” Jeroen Edwin Besma Eduardo

3 21 Dec 2004B-fysica. NIKHEF jaarvergadering, Niels Tuning3/53 Outline HERA-B BaBar  Highlights  News  Our contribution LHCb (  see also Bart Hommels)  General  Vertex Locator  Outer Tracker  Tracking  Trigger (  see Bart Hommels)

4 21 Dec 2004B-fysica. NIKHEF jaarvergadering, Niels Tuning4/53 HERA-B dilepton trigger events J/  (>1000 per hour)  c  (2S) events on C,Ti,W 1000 ev/s > 1TB/day Data taking upto March 2003 Minimum bias Dilepton triggered data 920 GeV protons Fixed target

5 21 Dec 2004B-fysica. NIKHEF jaarvergadering, Niels Tuning5/53 Analysing many topics: Pentaquark searches (pK s,  (PRL 93, 2004, ) Inclusive b  b cross section Upper limit on BR(D 0      (Phys.Lett.B596: ,2004) And lots of other analyses: Υ cross section Production of  and K* mesons  (2S) production D + /D 0 production ratio J/  cross section in MB Hard photon production  polarization  c production A dependence charmonium production J/  differential distributions V 0 and hyperon production Jet production Hernan Wahlberg Antonello Sbrizzi

6 21 Dec 2004B-fysica. NIKHEF jaarvergadering, Niels Tuning6/53 Pentaquarks - History Claims: LEPS (Osaka) :  γ 12 C with E γ  2.4 GeV  K + n resonance at 1540 MeV (4.6 σ) Θ + =  sudud pentaquark??  Observed by 12 experiments… NA49 (CERN) :  pp at  s = 17.1 GeV  Ξ - π - resonance at 1862 MeV (4.0 σ) Ξ — 3/2 =  udsds pentaquark??  Ξ - π + resonance at 1864 MeV Ξ 0 3/2 =  dusds pentaquark?? Ξπ hep-ex/ K + n hep-ex/ Laser Electron Photon Facility at SPring-8

7 21 Dec 2004B-fysica. NIKHEF jaarvergadering, Niels Tuning7/53  +,  -- Searches UL(95%)B  d  /dy| y=0 = 4-16  MeV/c 2  + /  (1520) < 3 – 12 % (HERMES:  + /  (1520)  300%) Counts pK 0 s mass UL(95%) mass GeV/c 2 NA49  HERA-B UL(95%)  mass UL(95%)B  d  /dy| y=0 = 2.5  1862 MeV/c 2  -- /  - < 3/B %  -- /  (1530) 0 < 4/B % B d  /dy  b/C Counts PRL 93, 2004, Bottom line: HERA-B does not see evidence for pentaquarks…

8 21 Dec 2004B-fysica. NIKHEF jaarvergadering, Niels Tuning8/53  bb production B Selection: Lepton impact to the wire Distance of J/  to wire b (  b )  B 0  J/  X J/    +  -,e + e -  R = relative efficiency  1 B selection eff. from MC 30-45% Measurement relative to direct J/  production to minimize trigger/reconstruction uncertainties

9 21 Dec 2004B-fysica. NIKHEF jaarvergadering, Niels Tuning9/53 preliminary Main contribution to unc: Br(bb  J/  X) = 2.32  0.20% E771/E789 : scaled to 41.6 GeV  (J/  )=357 ± 2 ± 36 nb/nucleon preliminary  bb production NLO calculations HERA-B 2000 : HERA-B measurements agree Measurements constrain the theory

10 21 Dec 2004B-fysica. NIKHEF jaarvergadering, Niels Tuning10/53 HERA-B Summary Preliminary results on most topics presented at conferences (>40) 2 papers published (BR(D 0     , pentaquark) Publication on advanced analyses in preparation (bb, , D + /D 0,  K*, J/ ,  (2S),...) Analysis will continue until end 2005

11 21 Dec 2004B-fysica. NIKHEF jaarvergadering, Niels Tuning11/53 Next HERA-B BaBar  Highlights  News  Our contribution LHCb (  see also Bart Hommels)  General  Vertex Locator  Outer Tracker  Tracking  Trigger (  see Bart Hommels)

12 21 Dec 2004B-fysica. NIKHEF jaarvergadering, Niels Tuning12/53 vd Brand CP violation - Overview Wu P-violation ‘57 Cronin CP-violation ‘64 Fitch CP-violation ‘64 Lee P-violation ‘56 Yukawa Couplings ‘33 Sacharov Baryon ass. ‘66 Cabibbo Angle θ C ‘63 KobayashiMaskawa 3 q gen. CKM ‘73 Wolfenstein CKM param ‘83 Nakada Homework: Is Wolfenstein Japanese? SMS y/n Yang P-violation ‘56 LHCb 2007

13 21 Dec 2004B-fysica. NIKHEF jaarvergadering, Niels Tuning13/53 What do we measure? We measure quark couplings There is a complex phase in couplings! Visible when there are 2 amplitudes: Γ( B  f) = |A 1 +A 2 e i(φ+δ) | 2 Γ(  B   f) = |A 1 +A 2 e i(-φ+δ) | 2 eiφeiφ e -iφ matteranti-matter Proof of existence of complex numbers…

14 21 Dec 2004B-fysica. NIKHEF jaarvergadering, Niels Tuning14/53 BaBar at PEP-II SVT: 97% efficiency, 15  m z hit resolution SVT+DCH:  (p T )/p T = 0.13 %  p T % DIRC: K-  separation GeV/c  GeV/c EMC:  E /E = 2.3 %  E -1/4  1.9 % Cerenkov Detector (DIRC) 144 quartz bars PMs 1.5 T solenoid Electromagnetic Calorimeter 6580 CsI(Tl) crystals Drift Chamber 40 stereo layers Silicon Vertex Tracker 5 layers, double sided strips e + (3.1 GeV) e - (9 GeV) z Instrumented Flux Return

15 21 Dec 2004B-fysica. NIKHEF jaarvergadering, Niels Tuning15/53 Serious accident in september  In the Linac klystron gallery  Start of DOE investigation – ongoing  Startup of accelerator may happen in January Muon upgrade  Need 5 months  When finish muon upgrade?? Impact on B  Kµ + µ - ( Rare decay, BR ~ ) ? Don’t lag behind Belle… News Luminosity (fb -1 ) 2006 ? Mail from Dec. 16 th : “This plan continues to aim at a January startup of PEP-II operation” Belle BaBar

16 21 Dec 2004B-fysica. NIKHEF jaarvergadering, Niels Tuning16/53 BaBar: What is NIKHEF doing? Common Tasks: Tracking software Global Alignment of vertex detector Beam spot determination Online calibration vertex detector Event store migration MC production & GRID 2  +  measurement(s): B 0  D ( * ) π B 0  D*ρ B 0  D ( * ) a 0 B 0  D ( * ) a 2 QCD factorization test Physics Analysis

17 21 Dec 2004B-fysica. NIKHEF jaarvergadering, Niels Tuning17/53 Seeman scenario for 2004 This years update: luminosity until ICHEP04 PEP-II delivered 117 fb -1 for Run 4  sep aug 2004  100 fb -1 was promised / expected from John Seeman’s scenario A total lumi of 220 fb -1 recorded ‘on the  (4S) peak’  ~240M B B pairs PEP-II Records Peak luminosity0.92x10 34 cm -2 s - Best day710.5 pb -1 BABAR logged246.4 fb -1 Expect to double again until 2006!!  0.5 ab -1

18 21 Dec 2004B-fysica. NIKHEF jaarvergadering, Niels Tuning18/53 I. Direct CP violation Only different if both δ and γ are ≠0 !  Γ( B 0  f) ≠ Γ(  B 0   f ) CP violation if Γ( B 0  f) ≠ Γ(  B 0   f ) But: need 2 amplitudes  interference Amplitude 1 + Amplitude 2

19 21 Dec 2004B-fysica. NIKHEF jaarvergadering, Niels Tuning19/53 B A B AR Signal (  BB pairs): 1606±51 First observation of Direct CPV in B decays Average Confirmation at ICHEP  BelleBelle hep-ex/ Phys.Rev.Lett.93:131801,  B A B AR Submitted to PRL on July 30th 2004 ~3 weeks after data taking …

20 21 Dec 2004B-fysica. NIKHEF jaarvergadering, Niels Tuning20/53 B 0  Kπ and B   K  π 0 Average 3.6  Average Redo the experiment with B  instead of B 0 … d or u spectator quark: what’s the difference ?? B0KπB0Kπ B+KπB+Kπ

21 21 Dec 2004B-fysica. NIKHEF jaarvergadering, Niels Tuning21/53 II. Time dependent CP violation + If final state is CP eigenstate then 2 amplitudes from mixing: B 0  f and B 0   B 0  f B 0 -  B 0 oscillation is periodic in time  CP violation time dependent e -iφ (i=e iπ/2  δ=90 o ) (φ=2β) Amplitude 2 Amplitude 1

22 21 Dec 2004B-fysica. NIKHEF jaarvergadering, Niels Tuning22/53 New Precision Measurement of sin(2  ) Update for ICHEP04 B A B AR 2002 result: (0.4 x statistics) B A B AR Maarten Bruinsma; BABAR PUB-04/038

23 21 Dec 2004B-fysica. NIKHEF jaarvergadering, Niels Tuning23/53 sin2  vs ‘non-CP’ CKM constraints sin2β in excellent agreement with the rest! (rest = ) KobayashiMaskawa 3 q gen. CKM ‘73 ? ±2σ

24 21 Dec 2004B-fysica. NIKHEF jaarvergadering, Niels Tuning24/53 III. “b-s penguin” B 0  J/ψK S B0φKSB0φKS  … unless there is new physics… New particles (also heavy) can show up in loops:  Can affect the branching ratio  And can introduce additional phase and affect the asymmetry Asymmetry in SM

25 21 Dec 2004B-fysica. NIKHEF jaarvergadering, Niels Tuning25/53 What happened to the CP asymmetry in B  Φ K s ?? Pure penguin diagramPure penguin diagram  SM: expect to measure sin2β=0.73± 0.04  Relative contribution of eg. SUSY potentially large New Phases from New Physics? LP’03:LP’03:  Belle: S = ± sigma away from SM…  BaBar: S = ± 0.43 ICHEP’04:ICHEP’04:  Belle: S =+0.06 ± 0.33  BaBar: S =+0.50 ± 0.25 Belle ( B 0  J/ψK S )

26 21 Dec 2004B-fysica. NIKHEF jaarvergadering, Niels Tuning26/53 Outlook of our analyses Analysis of time-dependent CP with B  D ( * )  published  First published constraint on sin(2  +  ) See Max’ talks last year Phys. Rev. Lett : Analysis of ‘wrong sign’ amplitude in B  J/  K* published  No ‘wrong sign’ amplitude observed  J/  K S and J/  K L do measure the same sin(2  ) As expected… Phys. Rev. Lett : Extend B  D ( * )  analysis with D ( * )  ,             angular analysis of D*  to measure polarization –Important test of ‘factorization’ in B decays  extract sin(2  +  ) Search for B  D ( * ) a  0, a  0         Rare decay a 0 has tiny decay constant!  If observed:  good sensitivity to sin(2  +  )!  If not observed: constraints on non-factorizable contributions to B decays ++ D(*)D(*) Hella Snoek Max Baak Leif Wilden

27 21 Dec 2004B-fysica. NIKHEF jaarvergadering, Niels Tuning27/53 What can LHCb add ?? In LHCb we have B 0 s “NIKHEF” channels: B s 0  D s K B s 0  J/ψ(µ + µ - ) φ B 0  X s µ + µ - Sander Klous Jan Amoraal Jeroen van Tilburg Besma M’charek Marko Zupan

28 21 Dec 2004B-fysica. NIKHEF jaarvergadering, Niels Tuning28/53 CKM angle  : B 0  Dπ and B s 0  D s K   larger interference (= large asymmetry!) >> B d 0  D (*) π B s 0  D s K  small interference (= small asymmetry!) B s 0  D s K annual yield estimate: 5400 events Hella Snoek Max Baak Leif Wilden Jeroen van Tilburg Besma M’charek

29 21 Dec 2004B-fysica. NIKHEF jaarvergadering, Niels Tuning29/53  not well constrained by BaBar with B  D ( * )   See Max’ talks last year  Phys. Rev. Lett : CKM angle   sensitivity at LHCb:  B s  D s K 14 o (using B s  J/ψφ for χ) γ+2β ?

30 21 Dec 2004B-fysica. NIKHEF jaarvergadering, Niels Tuning30/53 B 0 s  J/ ψφ Sander Klous Jan Amoraal B 0  J/ψK S B 0 s  J/ψφ Measure angle χ  Very small in SM  Any asymmetry means new physics… Golden decay  Like B 0  J/ψK S  Almost pure tree diagram Annual yield estimate: 100k events φ d = 2β sin2β = 0.73 φ s = -2χ sin2χ = 0.04

31 21 Dec 2004B-fysica. NIKHEF jaarvergadering, Niels Tuning31/53 b-s penguin: B 0 s  X s μμ Rare decay!  E.g. BR SM (B 0 s  K s μμ ) ~ 1.2 ± New physics might appear in loops Annual yield estimate: 9500 events Marko Zupan 03 December 2004

32 21 Dec 2004B-fysica. NIKHEF jaarvergadering, Niels Tuning32/53 Reconstruction/Tracking VELO seeds Long track (forward) Long track (matched) T seeds Upstream track Downstream track T track VELO track Jeroen van Tilburg Gabriel Ybeles Smit Eduardo Rodrigues 1243 IP Resolution 14µm+35µm/p T  1/p T (1/GeV)  Momentum (GeV) Momentum Resolution dp/p = 0.35 – 0.55 % (Needed for mass resolution!)(Needed for proper time resolution!)

33 21 Dec 2004B-fysica. NIKHEF jaarvergadering, Niels Tuning33/53 Pileup VETO: All 100% LHCb OT: Modules 50% Materials 100% Tooling 80% FE electronics100% Frames 100% VELO: Sensors 0% RF-foil 100% Readout chip 25% Vacuum Vessel 100% Bellow 100% Cooling 100% Reconstruction: OT simulation 100% Pattern recogn. 50% Kalman fit 100% Online tracking 25% OT VELO

34 21 Dec 2004B-fysica. NIKHEF jaarvergadering, Niels Tuning34/53 LHCb General status of the detector:  Design  see Bart Hommels  Trigger  see Bart Hommels  Status in the pit: Beampipe produced Magnet installed and aligned Muon filter being constructed NIKHEF involvement:  (Tracking and reconstruction)  (Physics selections)  Vertex Locator  Outer Tracker

35 21 Dec 2004B-fysica. NIKHEF jaarvergadering, Niels Tuning35/53 LHCb under construction Magnet: dipole warm Al conductor 4 Tm integrated field 4.2 MW 1450 t yoke aligned to 1 mm Muon+Calorimeter: muon filter being built One of most sophisticated piece of equipment calorimeter behind that Kachelpijp: Be 1 st piece delivered (2m) other pieces: AlBe

36 21 Dec 2004B-fysica. NIKHEF jaarvergadering, Niels Tuning36/53 VELO RF foil Test beam  Vacuum vessel and bellow  RF-foil design and construction  Test beam shifts and analysis  Readout chip (Beetle)  CO 2 cooling Vacuum tank Cooling

37 21 Dec 2004B-fysica. NIKHEF jaarvergadering, Niels Tuning37/53 VELO – RF foil RF foil: protect sensors from beam RF sensors not in primary LHC vacuum LHC beam  Important piece! Radiation length close to vertex Impact on proper time resolution  Mechanically very challenging Sensor redesign at the corners…  300 μm Al R&D is ongoing to try 200 μm

38 21 Dec 2004B-fysica. NIKHEF jaarvergadering, Niels Tuning38/53 VELO – Bellow Leaky bellow: (after 500 movements) Tight bellow VELO is moved out during LHC injection  (Remember: the VELO is in vacuum)

39 21 Dec 2004B-fysica. NIKHEF jaarvergadering, Niels Tuning39/53 VELO test beam Crucial to investigate chips and sensor thickness! Tested 4 different Beetle flavors Choice between 200 µm or 300 µm Si to be made soon  200 µm: low bias voltage, longer lifetime, less radiation damage, less X 0  300 µm: higher S/N ! Beetle 1.5 Beetle 1.3 MPW Beetle 1.4 Beetle mm from beam… Niels van Bakel Sander Klous Aras Papadelis

40 21 Dec 2004B-fysica. NIKHEF jaarvergadering, Niels Tuning40/53 VELO 200 µm sensor TDC time S/N (real units!) Very preliminary result: 200 µm sensor has large S/N Beetle chips perform well!  Very similar… Analysis ongoing  Resolution vs incident angle  Efficiencies  … + Beetle Beetle Beetle 1.3

41 21 Dec 2004B-fysica. NIKHEF jaarvergadering, Niels Tuning41/53 The Outer Tracker 3 stations 1 station = 4 layers: x-u-v-x 1 layer = 2 straw-monolayers  720 m 2 of straw surface 5 m 6 m

42 21 Dec 2004B-fysica. NIKHEF jaarvergadering, Niels Tuning42/53 The Outer Tracker Cracow: straw-support panels Warsaw: 120 short modules Heidelberg: 60 long modules NIKHEF: 120 long modules (= 50% of surface) Total nr of straws:   Half is made at NIKHEF 490 cm Width: 34 cm Length: 5 m

43 21 Dec 2004B-fysica. NIKHEF jaarvergadering, Niels Tuning43/53 OT Module Construction 15/05/2003: EDR (Engineering Design Review) 02/2004: 10% prod. 04/2004: EDR (Electronics Design Review) 05/2004: PRR (Production Readiness Review) 03/2005: 50% prod. 12/2005: 100% prod December 2004: produced 36 / 120 = 30% 50% milestone challenging… = milestone

44 21 Dec 2004B-fysica. NIKHEF jaarvergadering, Niels Tuning44/53 OT Module Production Cutting StrawsStraws aligned on template Glue on panel Panel on straws

45 21 Dec 2004B-fysica. NIKHEF jaarvergadering, Niels Tuning45/53 The Wiring

46 21 Dec 2004B-fysica. NIKHEF jaarvergadering, Niels Tuning46/53 The Wire… Microscope: Dark current under 1600 V: Good wire Bad wire  Company sent new wire: keep fingers crossed (preliminary tests are encouraging!) 30 modules finished without problems… and then: damaged Au plating on tungsten wire good wire:

47 21 Dec 2004B-fysica. NIKHEF jaarvergadering, Niels Tuning47/53 OT - Quality Assurance Wire Tension: 70 g Dark Current: 2 nA Gas Tightness: l/s Response to 90 Sr: ±5 % Last 25 modules:  3 bad wires  ~ 0.05% OK Peter Vankov Jacopo Nardulli Edwin Bos Findings: Bad wire quality Leaky gluing procedure Bad gas flow in Heidelberg modules Bad soldering of connectors Missing wire locators … Spotted timely  Adapted procedure

48 21 Dec 2004B-fysica. NIKHEF jaarvergadering, Niels Tuning48/53  Position Examples: Measure currents originating from β-source  Very accurate diagnostics! Full scan of the entire module  Every cm 2 of the OT is checked Wire locators 5 meter Final module check: 90 Sr  Current (nA)

49 21 Dec 2004B-fysica. NIKHEF jaarvergadering, Niels Tuning49/53 Frames Picture from last week:

50 21 Dec 2004B-fysica. NIKHEF jaarvergadering, Niels Tuning50/53 OT – “Medium Scale Test” Dowel pin Water cooling Gas pipes Cables trays C-frame Top plate Cables Electronic box Gas manifold Module Construct a ¼ station Test mechanics Fit cables, cooling, gas pipes, … Test grounding scheme Test multi-module readout system … C-frame = Outer tracker ¼ station:

51 21 Dec 2004B-fysica. NIKHEF jaarvergadering, Niels Tuning51/53 C-frame Plan to hang modules (with electronics!) (and HV cable…)

52 21 Dec 2004B-fysica. NIKHEF jaarvergadering, Niels Tuning52/53 Bezuinigingen Saved 200m HV cable from scrap yard!  6 CHF/ m Smuggled with camper of Fam. Sluijk: Tom Ria ItemEstimatedBezuinigd 200m cable Material Handling 50.0 Shipping Cost € Kindly credit 247 EUR (25% of save) to OT Budget or equally well (possibly better) to !!! Courtesy of Antonio Pellegrino shit

53 21 Dec 2004B-fysica. NIKHEF jaarvergadering, Niels Tuning53/53 Summary HERA-B  First publications  Analyses proceeding BaBar:  Discovery of direct CP violation in B-system  In trouble after serious accident… Restart in January? LHCb  VELO RF foil, Vacuum Vessel, Bellow: OK NEXT: Sensor thickness?  OT Module Production: OK Electronics: almost OK  Reconstruction/Physics Check the mirror


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