Fernando MartnezVidal

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BaBar SuperB
Fernando Martínez-Vidal IFIC, Universitat de
València-CSIC

• Fernando Martínez-Vidal
• IFIC, Universidad de Valencia-CSIC
• Concurso-Oposición CSIC29 de Septiembre de 2004

IN2P3-MICINN meeting January 12, 2008, Madrid
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475M Y(4S)?BB
362 published as today
Runs 1-5
Runs 1-4
Final collisions 1243pm, Monday 7 Apr 2008
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• Enhance knowledge on spectroscopy
• Missing SM hb(nS), hb(nS)
• Look for surprises
• Search for exotic physics, like
• Light dark matter candidate c
• NMSSM light Higgs a1

10 enhancement of world sample of Y(3S) Y(2S)
decays
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many of these already published

• First strong evidence of D0-D0 mixing (May07)
• Unexpected discovery of many new states

hb (Aug08)
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• hb decays mostly via two gluons, exclusive
  modes not known
• Search for bump in photon energy spectrum

Consistent with M1 transition (0.3-0.7)
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Operating Common Fund Basis
OCF 09 count (based on October 2008)
24 PhD (8.8)
4 PhD (1.2)

• LAPP-Annecy (7)
• 1 Faculty, 2 PhD Staff, 4 Grad
• Ecole Polytechnique (5)
• 1 Faculty, 2 PhD Staff, 1 Non-PhD Staff, 1 Grad
• LAL, Orsay (24)
• 8 Faculty, 1 PhD Staff, 8 Non-PhD Staff, 7 Grad
• Saclay (6)
• 4 PhD Staff, 2 Non-PhD Staff
• Univ. Paris VI VII (10)
• 4 Faculty, 1 PhD Staff, 5 Grad

• IFIC, University of Valencia-CSIC (5)
• 1 Faculty, 2 PhD Staff, 2 Grad
• University of Barcelona (2)
• 1 Faculty, 1 Grad

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The core Physics Analysis Program(Intense
Analysis Period, 2008-2010)

• Measurement of B0 and B lifetimes, B0 mixing,
  and observation of CP Violation
• Paris VIVII, LAPP, LAL, Ecole P., Saclay
• Publications PRL 87, 091801 (2001), PRL87,
  201803 (2001), PRL 88, 221802 (2002), PRD 66,
  032003 (2002),

• Measurement of CKM angle g with GLW, ADS and
  Dalitz (golden) techniques
• BaBar g combination (DalitzADSGLW)
• LAL, LAPP, Ecole Polytech., Paris VIVII
• Publications PRL 95, 121802 (2005), PRD 78,
  034023 (2008), PRD77, 111102 (2008), PRD78,
  092002 (2008),

• Precise extraction of D?Ken, pen, KKen, Kpen
  form factors (LQCD)
• LAL
• Publications PRD 76, 052005 (2007), PRD 78,
  051101 (2008), Eur.Phys.J.C52, 975 (2007)

D0 mixing and CPV in D?KSpp-, KSKK- (Dalitz
method, golden)
Y(nS) Physics (SM Exotics)
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Bilateral funding (history)
R-ratio measurement in the BaBar experiment
CICYT-IN2P3 2004, E. Grauges, UB M. Davier,
LAL
Estudios fenomenológicos y análisis de datos en
el experimento BaBar de la Factoría de Bs de
SLAC (EEUU) violación de CP, retorno radiativo y
Física del quark charm CICYT-IN2P3 2005-03,
CICYT-IN2P3 2006-19 F. Martinez-Vidal, IFIC,
Valencia A.M. Lutz, LAL
BaBar
Estudio de las desintegraciones semileptónicas de
hadrones charm en el experimento BaBar. MCCIN
IN2P3 2008 (NUC2008-000265) A. Oyanguren, IFIC,
Valencia P. Roudeau, LAL

• Producción de estados excitados en las
  desintegraciones semileptónicas de los mesones B
  y estudio de los sucesos con 4 jets
• CICYTIN2P3 PP99-1 (1998-2004)
• J. Salt, IFIC, Valencia P. Roudeau, LAL
• Estudio de la probabilidad de desintegración Z?bb
  y de las oscilaciones de los mesones B0-B0
  mediante técnicas de análisis multidimensional
• CICYTIN2P3 PP89-1 (1992-1997)
• A. Ferrer, IFIC, Valencia Ch. De la Vaissiere,
  Paris VIVII

DELPHI
among others
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BaBar ? SuperB/SuperBelle

• If there is New Physics at the TeV scale it must
  have a flavor/CP structure
• NP must couple to the SM, and the SM violates
  flavor
• New heavy quanta can be detected through
  precision measurement of processes involving loop
  diagrams
• Statistics of O(50 ab-1) is necessary to reduce
  the experimental error below the theoretical
  uncertainty for the most sensitive analyses
• Physics reach is complementary to LHCb
• many rare decays are not accessible at LHC
• sensitivity to off-diagonal term of squark mixing
  matrix
• test of LFV in t decays

1034 luminosity to have measurable effects
(anyhow) if NP particles are at EW scale
1036 luminosity to have measurable effects
(anyhow) if NP particles are at TeV scale
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The accelerators
Crab waist scheme
Small crossing area
IP
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SuperB/SuperBelle
New detector elements (BaBar)
BASELINE
OPTION

• Babar/Belle has been proved excellent detectors
  for B-physics
• ? Use same approach and reuse many elements
• Moderate RD and engineering required

• Photon detection for DIRC quartz bars
• Forward PID system (TOF or focusing RICH)
• Forward calorimeter crystals (LSO)
• Minos-style scintillator for IFR
• Electronics and trigger
• Computing large amount of data

• Small beam pipe technology
• Thin silicon pixel detector for first layer (1
  cm, lt0.5X0, 100 mm)
• Drift chamber CF mechanical structure, gas and
  cell size
• Photon detection for DIRC quartz bars

Quite similar for SuperBelle (but larger
backgrounds)
Better vertexing better hermiticity important
for many measurements
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SuperBelle Vertex Detector
6 layers at radius from 1.3 cm to 14 cm, 4
more readout channels than in SVD2 (BELLE)
Speed!
2 layers of pixel detectors
Beam-pipe (r1cm)
4 layers of strips
SuperBelle has adopted DEPFET as the technology
for the pixel detectors
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• Spanish contribution DEPFETs Collaboration
• Goals
• Use DEPFET sensors in ILC vertex detector
• Recently, use DEPFET in SuperBelle as
  intermediate project

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SuperB Vertex Detector

• The BaBar SVT technology is adequate for r gt 3cm
  use design similar to SuperB SVT
• Layer0 is subject to large backround and needs to
  be extremely thin gt 5MHz/cm2, 1MRad/yr, lt 0.5X0

Layer Radius 0 1.2 cm
1 3.3 cm 2 4.0 cm 3 5.9 cm
4 9.1 to 12.7 cm 5 11.4 to 14.6 cm

• Striplets option mature technology, not so
  robust
• against background.
• Moderate RD needed on module interconnection/mec
  hanics/FE chip (FSSR2)

Layers 1-5
Layer 0

• CMOS MAPS option
• New challenging technology
• Can provide the required thickness
• Existing devices are too slow
• Extensive RD ongoing (SLIM5-Collaboration) on
  3-well devices 50x50um2

• Hybrid Pixel Option tends to be too thick.
• An example Alice hybrid pixel module 1 X0
• Possible material reduction with the latest
  technology improvements
• Viable option, although marginal

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Plans for SuperB/SuperBelle

• We are interested to contribute to SuperB and/or
  SuperBelle
• Good projects for vertex detector construction
  (as intermediate project before ILC), with
  similar schedules
• SuperBelle Layers 1-2, DEPFETs (2009-2013)
• DEPFET Collaboration
• SuperB Layers 1-5, strips, FE chips (2009-2015)
• Good experience and infrastructure, lack of man
  power (yet)
• Very interesting luminosity domain (Lgt50 ab-1)
  to explore between 2014-2020
• Decisions to be taken during 2009, for project
  applications in 2010

Higgs-mediated NP in MFV at large tanb
B???
MH350 GeV
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Venue for the June 2009BABAR collaboration
meeting
Valencia June 22nd to 25th, 2009
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• Analysis of the proper time distribution of WS
  events permits extraction of D0 mixing parameters
  y, x2

Best fit Best fit, c2 0 No
mixing (0,0)
1 CL 3.17 x 10-1 (1s) 4.55 x 10-2 (2s) 2.70 x
10-3 (3s) 6.33 x 10-5 (4s) 5.73 x 10-7 (5s)
Contours at 1? intervals
RD (3.03 ? 0.16 ? 0.10) x 10-3 x2 (-0.22 ?
0.30 ? 0.21) x 10-3 y (9.7 ? 4.4 ? 3.1) x 10-3
Evidence confirmed by Belle and CDF
The no-mixing point is at the 3.9? contour