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Status of the NIKHEF B Physics Program J. F.J. van den Brand December 18, 2002 Prepared For: NIKHEF Annual Scientific Meeting.

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Presentation on theme: "Status of the NIKHEF B Physics Program J. F.J. van den Brand December 18, 2002 Prepared For: NIKHEF Annual Scientific Meeting."— Presentation transcript:

1 Status of the NIKHEF B Physics Program J. F.J. van den Brand December 18, 2002 Prepared For: NIKHEF Annual Scientific Meeting

2 Prof.dr Ing. J.F.J van den Brand, Dec – 2 1.Reduction of material (0.6 X 0  0.4 X 0 in front RICH-2): Better beam pipe and RF foil, light RICH mirror Reduce number of tracking stations (baseline: 9  4)  Tracking performance studies are promising  K S reconstruction under investigation 2.Use 1 st station in Level-1 trigger Momentum information available in topology trigger May require a full silicon station (6.8 m 2 )  careful study still needed Major change to tracking system LHCb Light Reduced number of stations from 11 (TP) to 9 (OT TDR) to 4 (LHCb light) (xx-uu-vv-xx layers/station) Marcel Merk, Gerhard Raven Jeroen van Tilburg, Jeroen van Hunen Rutger Hierck, Rutger van der Eijk

3 Prof.dr Ing. J.F.J van den Brand, Dec – 3 LHCb-light TDR submission  September 2003 Need to complete physics performance study with -improved reconstruction and analysis software -much higher bb statistics for the background study This delay does not compromise the overall LHCb plan. LHCb Light Design not affected VELO, T1 to T3 (OT and IT), RICH-2, CALO and Muon proceed towards the construction Re-design needed RICH-1: modify mechanics and optics to shield photon detectors TT:change to all silicon detector to be used in the L-1 trigger. With `LHCb-light’ detector Track reconstruction efficiency is good PID efficiency Track quality Trigger efficiency is good.  A TP level physics performance can be achieved after physics cuts are optimized.

4 Prof.dr Ing. J.F.J van den Brand, Dec – 4 ~1.4  1.2 m 2 ~6  5 m 2 LHCb-light Detector Set-up

5 Prof.dr Ing. J.F.J van den Brand, Dec – 5 VELO – Vertex Locator 21 stations VX (84 silicon detectors) 2 stations Pile-Up detector R and Phi readout geometry 220 μm thick Concentrated on prototyping RF foil, bellows Sensors, FE electronics Hans de Vries, Jo van den Brand Marco Kraan, Martin Doets

6 Prof.dr Ing. J.F.J van den Brand, Dec – 6 Full size prototypes produced: 200 and 300  m thickness RF foil: hot-gas forming Chiel Bron, Herman Boer Rookhuizen Frans Mul, Johan Kos

7 Prof.dr Ing. J.F.J van den Brand, Dec – 7 RF Foil, Si-sensors and Tolerances Curvature of RF foil in critical Region is limited to > 1/8 mm Variation in depth one slot ± 0.1 mm all slots ± 0.2 mm

8 Prof.dr Ing. J.F.J van den Brand, Dec – 8 8 mm 42 mm Milestones RF foil review (Nov. 29) EDR with LHC groups (Dec. 16 & 17) Decision on FE chip (Jan. 2003) Silicon design review (Feb. 2003) VELO Sensors Silicon sensors: New layout with an overall 45 degree strip design for the R-sensors yields better L1 trigger performance, only small loss in resolution Strips on R detector: 16 x 128 pitch: 40 – 92  m length: 6.4 – 66.6 mm angular coverage 182° 4-layer hybrid: routing for readout of 2048 strips Sander Mos, Jan Koopstra Joop Rovekamp

9 Prof.dr Ing. J.F.J van den Brand, Dec – 9 Both FE chip candidates, Beetle 1.1 and SCTA_VELO, have been tested with full size hybrids and sensors in beam, final decision in January ‘03 SCTA_VELO radiation tests done, analysis in progress VELO electronics review in June ’02 revealed no major problems, Level 1 proto-3 digitizer board in design stage Beetle1.1 is produced by ASIC Heidelberg in collaboration with NIKHEF VELO: FE electronics shootout Beetle 1.2 chip received, tests started, looks okay Eddy Jans, Henk Jan Bulten Tjeerd Ketel, Sander Klous Hella Snoek, Martin van Beuzekom

10 Prof.dr Ing. J.F.J van den Brand, Dec – 10 LHCb – Luminosity versus Events Problem VETO detectors 2 1 million bb events every 10 seconds Free-up bandwidth by vetoing pile-up events 2 Si R sensors Leo Wiggers, Marko Zupan Hans Verkooijen, Wilco Vink

11 Prof.dr Ing. J.F.J van den Brand, Dec – 11 Pile-Up Detector: Processor Board Prototype 2 Xilinx FPGAs XCV3200E  m 6-Layer Metal Process - 4,074,387 System Gates I/O pins 1156 pin BGA pin BGA

12 Prof.dr Ing. J.F.J van den Brand, Dec – 12 Layout: - 3 stations - with each 4 layers: X,U,V,X - straw tube modules TDR approved in Feb 2002 Outer Tracker New straw material (prelaminated 12  m Al / 25  m Kapton XC)  acceptable gas tightness Gras van Apeldoorn, Antonio Pellegrino Loek Ceelie, Oscar van Petten, Ruud Arink Henk Schuilenburg, Adrie Liem

13 Prof.dr Ing. J.F.J van den Brand, Dec – 13 Tidying-up details of the chamber design Improved wire locator design: easier wire insertion and significantly less spurious pulses Outer Tracker Mechanical design of FE electronics board vigorously pursued: Front-end electronics, HV and gas supply in limited space Ad Berkien, Tom Sluijk Ed van den Born

14 Prof.dr Ing. J.F.J van den Brand, Dec – 14 Outer Tracker Production NIKHEF Warsaw Clean rooms at three production sites: -NIKHEF -Heidelberg (existing extended) -Warsaw Test production of 5 m long panels in Cracow successful  EDR is planned for May ’03  Materials acquisition in 2003  Pre-series production in June ’03  Series production to start in Sep. ‘03

15 Prof.dr Ing. J.F.J van den Brand, Dec – 15 On detector Off detector OTIS 1.0 TDC chip: first prototype with basic functionality under test Outer Tracker Electronics Track trigger under investigation Albert Zwart Marcel Merk Bart Hommels NIKHEF responsible for Front-End electronics

16 Prof.dr Ing. J.F.J van den Brand, Dec – 16 LHCb Data Challenge: Collaborate Grid Middleware with the LHCb software framework Gaudi Large data samples (3.3 M events) produced in August by Amsterdam (80k), Bologna (1009k), Cambridge (37k), CERN (1452k) Lyon (595k), Moscow (27k), Oxford (24k), RAL (130k), Rio (24k) Distributed Computing – Grid Future: employ SARA Mass Storage for DataGrid LHCb Data Challenge Henk Jan Bulten, Sander Klous Jeff Templon, David Groep First use of Storage for DataGrid outside CERN Implement in Analysis: First use of DataGrid for Analysis within LHCb Data for LHCb-Light and trigger studies

17 Prof.dr Ing. J.F.J van den Brand, Dec – 17 Significant progress: all elements running FLT and SLT working DAQ event rate on tape: 1 kHz (min. bias) 200 Hz (triggered)  running with high priority at Hera since Nov. 1st Observed signals: Future plans: Strong program in charmonium and open charm physics B s physics Charmonium: J/  (J/  e + e - : cut on E/p only),  ’,  c (  c1,  c2 states resolved?) Open charm: D +, D -, D 0, D s, D* + Hyperon: , ,  -,  +,  0,  -,  + _ HERA-B Thomas Bauer, Maaijke Mevius, Antonello Sbrizzi, Hernan Wahlberg Mohamed Ouchrif

18 Prof.dr Ing. J.F.J van den Brand, Dec – 18 Trigger: 1FLT 2SLT tracks Muon + Electron channel Approx J/  per hour Est. statistics (3 Dec.): 10 5 J/  10 % of statistics di-lepton mass:  cumulative data 55M 31M - FLT events - Min. bias events Hera-B DAQ running HERA-B

19 Prof.dr Ing. J.F.J van den Brand, Dec – 19 Min. bias data: 15 M events     mass:  0 (1530)  K  mass:   K + K -  + mass: D s 1.53 GeV 1.97 GeV 1.67 GeV HERA-B Talk by Mohamed Ouchrif

20 Prof.dr Ing. J.F.J van den Brand, Dec – 20 BaBar Gerhard Raven, Henk Jan Bulten Max Baak Dedicated B physics experiment Physics programs based on exclusive reconstructed B events Triggers for purely hadronic B decays - (trivial in the case of BaBar ;-) Momentum resolution Vertex resolution Excellent particle ID: - K/  separation crucial for many topics in B physics - Dedicated Cherenkov detectors for K/  separation

21 Prof.dr Ing. J.F.J van den Brand, Dec – 21 BaBar  NIKHEF participates in a cutting edge, dedicated, well-running B physics experiment –Predictable performance, low risk –Timescale good match to current LHC startup  With a limited but coherent effort, we can make an impact on the  -  plane –Measurement(s) of  at BaBar are a good match to our established LHCb plans (expect ~15k reconstructed D*  by summer 2005)  We can gain a lot of B-physics experience which will help improve our readiness to analyze LHCb data at the startup of LHC –Exclusive B reconstruction/selection, time dependent & angular fits, analysis logistics, … B0B0 bdbd udud cdcd -- D* + bdbd cdcd udud -- B0B0 bdbd cdcd udud bdbd udud cdcd ++ ++ D* - B0B0 B0B0 ub |V ub V cd * /V cb * V ud |~2% sin(2  +  )

22 Prof.dr Ing. J.F.J van den Brand, Dec – 22 Summary – Important Events  LHCb progresses well –Inner Tracker TDR, LHCb Light studies  Vertex Detector - LHCb –TDR approved Dec 2001, Lemic, RF foil –VELO group selects Beetle FE chip  Level-0 Trigger –FOM funding 420 kEuro received  Outer Tracker - LHCb –TDR approved Feb 2002 –OTR Project Leader LHCb – Antonio –OTR Clean Room Facility  LHCb Distributed Computing –NIKHEF – VU Farms in production  HERA-B –FLT working, data taking in progress –First physics publications  BaBar –Proposal to WAR and SAC –Admitted to BaBar last week!  New Senior Staff –Antonio Pellegrino (NIKHEF) –Henk Jan Bulten (VU) –Gerhard Raven (VU)  New Postdoc –Jeroen van Hunen  New Ph.D. Students –Max Baak (AIO – BaBar) –Marco Zupan (OIO – LHCb) –Peter Vankov (OIO – LHCb) –Bo Liu (offer: OIO – LHCb)  Ph.D. Theses Completed –Maarten Bruinsma –Wouter Hulsbergen –Rutger van der Eijk  Departed Staff –Bert Koene –Matthew Needham (postdoc) –Iouri Gouz (visitor)

23 Prof.dr Ing. J.F.J van den Brand, Dec – 23 LHCb trigger system 40 MHz 40 kHz 4 Mb/s 4 Tb/s high P T muons high P T electrons high P T hadrons high P T  /  0 pile-up veto Level-0 decision unit Muon SystemCalorimeter System Pile-up detector Higher Levels Level-0 (4  s) Level-1 Vertex trigger (2ms) Levels-2&3 All the detector Level-1 trigger unit 1 MHz 100 Gb/s VELO

24 Prof.dr Ing. J.F.J van den Brand, Dec – 24 The possible effects of New Physics In this example, a clean measurement of  could provide evidence for new physics

25 Prof.dr Ing. J.F.J van den Brand, Dec – 25 VELO Rectangular Bellows Rectangular bellows: 3 rd iteration in preparation (to solve sagging problem) Parallel effort in edge-welding Herman Boer Rookhuizen Jan Langedijk, Michiel Jaspers

26 Prof.dr Ing. J.F.J van den Brand, Dec – 26 Wake field suppressor (Cu/Be): mechanical testing (30,000 cycles) successful VELO Wake Field Suppressors Foil thickness 30  m Aluminum 50 ohm coaxial line Power level: 10 W at 40MHz Frans Kroes Niels van Bakel

27 Prof.dr Ing. J.F.J van den Brand, Dec – 27 Sensors: RF pick-up Si detector 5 mm from the foil outside conductor of the coax. No influence on the noise background. Field levels from this radiator are much higher then what we can obtain with the beam through the RF foil. No influence on sensor and electronics operation. Frans Kroes Tjeerd Ketel

28 Prof.dr Ing. J.F.J van den Brand, Dec – 28 Vertex reconstruction from hits in two detector planes Pile-Up Detector: Algorithm Luminosity detector Counting the number of one-vertex and two-vertex events Precision of relative luminosity measurement of the order of 0.1%


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