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The SuperB Detector Fabrizio Bianchi University of Torino and INFN-Torino III Mexican Workshop on Flavour Physics Mexico City , 7-9 December 2011 F. Bianchi 1

The SuperB Detector

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The SuperB Detector. Fabrizio Bianchi University of Torino and INFN-Torino III Mexican Workshop on Flavour Physics Mexico City , 7-9 December 2011. Outline. The Physics Case. The Machine. The Detector. Milestones. The Physics Case. - PowerPoint PPT Presentation

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Page 1: The  SuperB  Detector

The SuperB Detector

Fabrizio BianchiUniversity of Torino and INFN-Torino

III Mexican Workshop on Flavour PhysicsMexico City , 7-9 December 2011

F. Bianchi 1

Page 2: The  SuperB  Detector

Outline• The Physics Case.

• The Machine.

• The Detector.

• Milestones.

F. Bianchi 2

Page 3: The  SuperB  Detector

The Physics Case• Current flavor physics landscape is defined by

BaBar, Belle, CDF, D0, Cleo-c, BES results.– Triumph of the CKM paradigm.– Indirect constraints on New Physics.– Handed over to LHCb in the summer.

• First collision in SuperB will be in 2016 and the first full run is expected in 2017.– LHCb will have re-defined some areas of Flavor Physics.– LHC may (or may not) have found New Physics.– In both scenarios SuperB results can be used to

constraint Flavor Dynamics at high energy

F. Bianchi 3

Page 4: The  SuperB  Detector

The Energy Scale of NP: LNP (1)• SuperB does not operate at High Energy.

– What’s the point of having it ?

• Two paths in the quest for NP:– The relativistic path:

• Increase the energy and look for direct production of new particles.– The quantum path:

• Increase the luminosity and look for effects of physics beyond the standard model in loop diagrams.

• Model dependent indirect searches for NP at SuperB reach higher scales then can be attained at LHC.– B mixing and top: everyone knew the top was light until ARGUS

found B mixing to be large.

F. Bianchi 4

Page 5: The  SuperB  Detector

The Energy Scale of NP: LNP (2)

F. Bianchi 5

• Example: MSSM.• Simple, constrained by LHC data, but general enough to

illustrate the issue:

• In many NP scenarios the energy frontier experiments will probe diagonal elements of mixing matrices.

• Flavor experiments are required to probe off-diagonal ones.

Page 6: The  SuperB  Detector

The Timeline of Flavor Physics

F. Bianchi 6

Page 7: The  SuperB  Detector

Expected data sample for SuperBf

F. Bianchi 7

• ϒ(4S) region:– 75ab−1 at the ϒ(4S)– Also run above / below

the ϒ(4S)~75 x109 B, D and t pairs(5 years run)

• ψ(3770) region:– 1 ab−1 at threshold– Also run at nearby

resonances~4 x 109 D pairs(< 1 year run)

R

Page 8: The  SuperB  Detector

Super B Physics Program in a Nutshell

• Test of CKM Paradigm at 1% level.

• B rare decays

• Lepton Flavor Violation.

• Charm Physics.

• Bs Physics.

• Many more topics: Electro-Weak measurements, new hadrons, …

• See A. Perez presentation at this conference.

F. Bianchi 8

Page 9: The  SuperB  Detector

The CKM Paradigm

F. Bianchi 9

b = f1; a = f2; g = f3

Page 10: The  SuperB  Detector

Summer 2011: Triumph of CKM

F. Bianchi 10

Good agreement: no evident discrepancy or “tension”, even with different statistical analysis.

Page 11: The  SuperB  Detector

Test of CKM Paradigm

F. Bianchi 11

• Unitarity Triangle Angles– σ(α) = 1−2°– σ(β) = 0.1°– σ(γ) = 1−2°

• Cabibbo-Kobayashi-Maskawa Matrix Elements– |Vub| : Incl. σ = 2%; Excl. σ = 3%– |Vcb|: σ = 1%– |Vus|: Can be measured precisely

using τ decays– |Vcd| and |Vcs|: can be measured at/near charm threshold.

• SuperB Measures the sides and angles of the Unitarity Triangle

The "dream" scenario with 75ab-1

Page 12: The  SuperB  Detector

F. Bianchi 12

CKM measurements: SuperB vs. LHCb

Page 13: The  SuperB  Detector

LHC: no Susy so far

F. Bianchi 13

Susy mass scale is likely to be above 1 TeV.

Page 14: The  SuperB  Detector

B Rare Decays

F. Bianchi 14

Page 15: The  SuperB  Detector

Lepton Flavor Violation

F. Bianchi 15

Page 16: The  SuperB  Detector

Charm at SuperB• At the U(4S) with 75 ab-1:

– Large improvement in D0 mixing and CPV: factor 12 improvement in statistical error wrt BaBar (0.5 ab-1).

– Time-dependent measurements will benefit also of an improved (2x) D0 proper-time resolution.

• At the Y(3770) with 500 fb-1:– coherent production with 100x BESIII data and CM

boost up to βγ=0.56.– Almost zero background environment.– Possibility of time-dependent measurements exploiting

quantum coherence.– Study CPV with Flavor and CP tagging.

F. Bianchi 16

Page 17: The  SuperB  Detector

Charm Mixing and CPV

F. Bianchi 17

• Decays of Y (3770) D0D0 produce coherent (C=-1) pairs of D0’s. Quantum correlations in their subsequent decays allow measurements of strong phases.– Required for improved measurement of CKM angle g.– Also required for D0 mixing studies

Page 18: The  SuperB  Detector

Bs Physics• Can cleanly measure As

SL using U(5S) data

• SuperB can also study rare decays with many neutral particles, such as , which can be enhanced by SUSY.

F. Bianchi 18

Page 19: The  SuperB  Detector

Golden Measurements: SuperB vs. LHCb

F. Bianchi 19

Page 20: The  SuperB  Detector

The Machine

F. Bianchi 20

Page 21: The  SuperB  Detector

Machine: Parameter Requirements from

Physics

F. Bianchi 21

Parameter Requirement CommentLuminosity (top-up mode) 1036 cm-2s-1 @ U(4S) Baseline/Flexibility with headroom at

4. 1036 cm-2s-1

Integrated luminosity 75 ab-1 Based on a “New Snowmass Year” of 1.5 x 107 seconds(PEP-II & KEKB experience-based)

CM energy range t threshold to U (5S)

For Charm special runs (still asymmetric……)

Minimum boost bg ≈0.237~(4.18x6.7GeV)

1 cm beam pipe radius. First measured point at 1.5 cm

e- Polarization

Boost up to 0.56 in runs at low energy under evaluation for charm physics

≥80% Enables t CP and T violation studies, measurement of t g-2 and improves sensitivity to lepton flavor-violating decays. Detailed simulation, needed to ascertain a more precise requirement, are in progress.

Page 22: The  SuperB  Detector

e+e- Colliders

F. Bianchi 22

Page 23: The  SuperB  Detector

How to get 100 times more luminosity ?

F. Bianchi 23

*341017.2

y

byEInL

b

y Vertical beam-beam parameter

Ib Bunch current (A) n Number of bunches by

* IP vertical beta (cm) E Beam energy (GeV)

Present day B-factories

PEP-II KEKBE(GeV) 9x3.1 8x3.5Ib 1x1.6 0.75x1n 1700 1600I (A) 1.7x2.7 1.2x1.6by* (cm) 1.1 0.6 y 0.08 0.11L (x1034) 1 2

Answer:Increase Ib

Decrease by*Increase y

Increase n

Page 24: The  SuperB  Detector

A New Idea• Pantaleo Raimondi came up with a new scheme to attain high

luminosity in a storage ring:– Change the collision so that only a small fraction of one bunch collides

with the other bunch• Large crossing angle• Long bunch length

– Due to the large crossing angle the effective bunch length (the colliding part) is now very short so we can lower by* by a factor of 50

– The beams must have very low emittance – like present day light sources

• The x size at the IP now sets the effective bunch length

– In addition, by crabbing the magnetic waist of the colliding beams we greatly reduce the tune plane resonances enabling greater tune shifts and better tune plane flexibility

• This increases the luminosity performance by another factor of 2-3F. Bianchi 24

Page 25: The  SuperB  Detector

The Accelerator Strategy• SuperB is a 2 rings, asymmetric energies (e- @ 4.18, e+ @

6.7 GeV) collider with:– large Piwinski angle and “crab waist” (LPA & CW) collision

scheme– ultra low emittance lattices – ideas taken from ILC design– longitudinally polarized electron beam– target luminosity of 1036 cm-2 s-1 at the U(4S)– possibility to run at t/charm threshold still with polarized

electron beam with L = 1035 cm-2 s-1

• Design criteria :– Minimize building costs– Minimize running costs (wall-plug power and water consumption)– Reuse of some PEP-II B-Factory hardware (magnets, RF)

• SuperB can also be a good “light source”: work is in progress to design Synchrotron Radiation beamlines (collaboration with Italian Institute of Technology)

F. Bianchi 25

Page 26: The  SuperB  Detector

Baseline Collider parametersBaseline peak luminosity at Y(4S) is 10 36 cm-2 s -1

.It ca be increased by adding RF power up to a factor of 4 .The runs near charm threshold Y(3770) pay a factor O(10) in luminosity. At charm threshold the boost( bg ) can be increased up to 0.5 for time dependent measurements, still with a reasonable polarization.

3.5 min beam lifetime . CONTINUOUS INJECTION as in PEPII

Injected 90% polarized electrons

Page 27: The  SuperB  Detector

Synchrotron light options @ SuperB

• Comparison of brightness and flux for different energies dedicated SL sources & SuperB HER and LER from bending magnets .

Page 28: The  SuperB  Detector

Synchrotron light options @ SuperB• Comparison of brightness and flux for different energies

dedicated SL sources & SuperB HER and LER with undulators.

• Light properties from undulators better than most SLWith Undulators

Page 29: The  SuperB  Detector

SuperB vs SuperKEKB

F. Bianchi 29

Page 30: The  SuperB  Detector

SuperB Luminosity Model

2016

2017

2018

2019

2020

2021

2022

2023

2024

0.005.00

10.0015.0020.0025.0030.00

Peak Luminosity (10^35)

2016

2017

2018

2019

2020

2021

2022

2023

2024

0.0010.0020.0030.0040.0050.0060.0070.0080.0090.00

100.00

Integrated Luminosity(1/ab)

75 ab-1

Page 31: The  SuperB  Detector

31

The Detector

11/18/2011

Page 32: The  SuperB  Detector

Detector Evolution: from to• Babar and Belle designs have proven to be very effective for B-Factory physics.

– Follow the same ideas for SuperB detector.– Try to reuse same components as much as possible.

• Main issues:– Machine backgrounds – somewhat larger than in Babar/Belle.– Beam energy asymmetry – a bit smaller.– Strong interaction with machine design.

• A SuperB detector is possible with today’s technology.– Baseline is reusing large (expensive) parts of Babar.– Quartz bars of the DIRC.– Barrel EMC CsI(Tl) crystal and mechanical structure.– Superconducting coil and flux return yoke.

• Some areas require moderate R&D and engineering developments to improve performance:

– Small beam pipe technology.– Thin silicon pixel detector for first layer.– Drift chamber CF mechanical structure, gas and cell size.– Photon detection for DIRC quartz bars .– Forward PID system (TOF or focusing RICH).– Forward calorimeter crystals.– Minos-style scintillator for Instrumented flux return.– Electronics and trigger.– Computing: has to handle a massive amount of data.

F. Bianchi 32

Page 33: The  SuperB  Detector

Detector Layout

F. Bianchi 33

Page 34: The  SuperB  Detector

Silicon Vertex Tracker • The Babar SVT technology is adequate for R > 3cm:

– use design similar to Babar SVT

• Layer-0 is subject to large background and needs to be extremely thin:

– More than 5MHz/cm2, 1MRad/yr, < 0.5%X0

– Striplets baseline option: mature technology, not so robust against background.

• Marginal with background rate higher than ~ 5 MHz/cm2

• Moderate R&D needed on module interconnection/mechanics/FE chip (FSSR2)

– Upgrade to pixel (Hybrid or CMOS MAPS), more robust against background, foreseen for a second generation of Layer-0

F. Bianchi 34

Page 35: The  SuperB  Detector

The Drift Chamber• Provides precision momentum measurements. • Provides particle ID via dE/dx for all low

momentum tracks, even those that miss the PID system.

• Build on BABAR drift chamber concept, but:– Lighter structure, all in Carbon Fiber (CF)

• Preliminary studies show that dome-shaped CF end-plates with X0~2% seem achievable (compare 13-26% in BaBar DCH)

– Faster & lighter electronics (taking into account detectors options to be possibly installed behind backward end-plates)

• Some R&D issues:– Electronics location and/or mass to reduce

effect on backward EMC, – Low Mass Endplates – Can we do better on dE/dx (counting clusters)? – Conical/stepped endplates or other ways to

reduce sensitivity close to the beam. – Background simulation/shielding optimization

F. Bianchi 35

Page 36: The  SuperB  Detector

The Focusing DIRC• Hadronic PID system essential for p(p,K)>0.7GeV/c

– use dE/dx for p<0.7GeV/c

• Baseline is to reuse BaBar DIRC barrel-only design– Excellent performance to 4GeV/c– Robust operation– Elegant mechanical support– Photon detectors outside field region– Radiation hard fused silica radiators

• To cope with high luminosity (1036 cm-2s-1) & high background:

– Complete redesign of the photon camera (SLAC-PUB-14282)

– A true 3D imaging using: – 25 smaller volume of the photon camera – 10 better timing resolution to detect single

photons – Optical design is based entirely on Fused Silica

glass • avoid water or oil as optical media

F. Bianchi 36

Page 37: The  SuperB  Detector

FDIRC: Photon Camera• Photon camera design (FBLOCK):

– Initial design by ray-tracing (SLAC-PUB-13763) – Experience from the 1rst FDIRC prototype (SLAC-PUB-12236) – Geant4 model now (SLAC-PUB-14282)

• Main optical components – New wedge (old bar box wedge was not long enough) – Cylindrical mirror to remove bar thickness – Double-folded mirror optics to provide access to detectors

• Photon detectors: highly pixilated H-8500 MaPMTs – Total number of detectors per FBLOCK: 48 – Total number of detectors: 576 [12 FBLOCKs] – Total number of pixels: 576 32 = 18,432

F. Bianchi 37

Page 38: The  SuperB  Detector

Forward PID

• Goal is to improve PID in the forward region.• Challenges :

– Limited space available – Any additional detector should have a small X0 – Gain limited by the small solid angle – [qpolar~15 - 25 degrees] – The new detector must be efficient

• Different technologies being studied – Time-Of-flight: ~10ps resolution needed – RICH: great performances but thick and expensive

• Decision by the TDR time – Task force set inside SuperB to review proposals:

• There is merit to leave some space (5cm) but more would damage the DCH performance.

• Building an innovative forward PID detector would require additional manpower & abilities

F. Bianchi 38

Page 39: The  SuperB  Detector

The Electromagnetic Calorimeter

Barrel (5760 CsI(Tl) Crystals) :• BaBar barrel crystals not suffering signs of radiation damage. They’re sufficiently

fast and radiation hard for SuperB needs• They can be reused. (Would have been) most expensive detector component• Background dominated by radiative Bhabhas. IR shielding design is crucial

Endcaps:• Best possible hermeticity important for key physics measurements• New forward endcap• Backward endcap is an option

F. Bianchi 39

Essential detector to measure energy and direction of g and e, discriminate between e and p, and detect neutral hadrons

Page 40: The  SuperB  Detector

Forward and Backward EMC* Forward endcap

– BaBar CsI(Tl) endcap inadequate for higher rates and radiation dose of SuperB• Need finer granularity• Faster crystals and readout electronics• comparable total X0

– Option 1: LYSO crystalsfrees 10cm for a forw. PID systemradiation hard, fast, small Moliere radius, good light yieldexpensive (~40$/cc) at the moment

* Backward endcap (option)– Pb plates and scintillating tiles with fiber readout to SiPMs (or MPPC)– Veto device, 10% sensitivity increase in B-> tn

F. Bianchi 40

Page 41: The  SuperB  Detector

Forward EMC: LYSO + possible alternatives

• LYSO -> finalizing results from Test Beam at BTF– roughening of crystals is ongoing, readout with 2 APD’s per crystals is ready– beam lines not available until beginning of 2012 (we are in contact with people for BTF,

Mainz, SLAC) – more news soon

• Other options:– Pure CsI, readout VPT and Photopentode

• Measurements in LAB have started – PWO-II + LAAPD

• Second generation of crystals L.O. increased by 85%• In contact with producers to order one crystal

– BGO readout PMT • already some studies have been carried out • PMT readout + APD (to be done)

– BGO and PWO measurements of LY with radiation damage at Caltech

• FULL MATRIX TEST with ONE of the alternatives (1-2-3) in 2012 after measurements in LAB and simulation studies

F. Bianchi 41

Page 42: The  SuperB  Detector

The Instrumented Flux Return• Provides discrimination between m and p±. Help detection and direction

measurement of KL (together with EMC)

• Composed by 1 hexagonal barrel + 2 endcaps as in BaBar

• Add absorber w.r.t. BaBar to improve p/m separation. Amount and distribution to be optimized

– 7-8 absorber layers– reuse of BaBar IFR iron under evaluation

• Use extruded scintillator a la MINOS coupled to geiger mode APDs through WLS fibers

– expected hit rates of O(100) Hz/cm2d– single layer or double coord. layout depending on

the x-y resolution needs

F. Bianchi 42

Page 43: The  SuperB  Detector

Electronics, Trigger, DAQ• Working conditions

– Trigger rate is expected to be of the order of 100 kHz at 1036. • The sole Bhabha’s background: 50 kHz.

– baseline target rate of about 150 kHz.• Issue of safety margin. How much, and where do we put the safety ?

– A readout window (1ms) has to be foreseen– Synchronous mode preferred. Clock O(56MHz).

• Clock and Fast Control System– Clock distribution not at all trivial to ensure phase synchronization– Try to use commercial component as much as possible (FPGA)

• Relying on SLHC development (such as GBT) very risky• Try to define strategic placement of components so that radiation damage is kept under

control.– Different options to be studied and simulated

• L1 Trigger – Primitives @ 7MHz

• Dataflow – Local buffers, overlapping readout windows

• Frontend model – synchronous, fixed latency

• Radiation mitigation

• High Level Trigger and pre-processing boards – input bw O(15MB/s)F. Bianchi 43

Page 44: The  SuperB  Detector

44

SuperB Computing Model• Baseline is an extrapolation of BaBar computing model to a luminosity

100 times larger.

• “Raw data” from the detector will be permanently stored, and reconstructed in a two step process:

– a “prompt calibration” pass on a subset of the events to determine calibration constants.

– a full “event reconstruction” pass on all the events that uses the constants derived in the previous step.

• Monte Carlo data will be processed in the same way.

• Selected subset of Detector and MC data, the “skims”, will be made available for different areas of physics analysis.

– Very convenient for analysis.– Increase the storage requirement because the same events can be present in

more than one skim.

• Improvements in constants, reconstruction code, or simulation may require reprocessing of the data or generation of new simulated data.

– Require the capability of reprocessing in a given year all the data collected in previous years.

Page 45: The  SuperB  Detector

45

An Attempt to Estimate theSuperB Detector Computing Needs

• Limited precision due to many assumptions:– Raw Event size ~100kByte (= 3 x BaBar)– Mini/Micro event size = 2 x BaBar– CPU / unit lumi: 3 x BaBar– 2 copies of raw data– Skim expansion factor: 5– Some fraction of Mini on disk (100% -> 10%)– Equivalent amount of MC “lumi”– Raw data stored on tape

• Storage grows from O(50) PB to O(600) PB in 6 years.

• CPU grows from 500 to 12,000 KHepSpec in 6 years.

Page 46: The  SuperB  Detector

Computing Infrastructure

F. Bianchi 46

Page 47: The  SuperB  Detector

47

Cost and Challenges• Crude estimate: O(5 Million Euros/year) assuming:

– Validity of Moore’s law.– Start of data taking in 2016.– Purchase the hardware one year in advance.– Infrastructure cost is not included.

• But:– Is Moore’s law still valid ?

• Code must be optimized for running on multi/many core architectures.– How to access efficiently and reliably hundreds of PB of data ?

• Identify a strategy to avoid I/O bottleneck.• Understand how to share and replicate data among sites.

– How use efficiently and reliably hardware resources widely dispersed ?• Adopt/develop a distributed resource management framework.

• R&D program is in place to address these issues.– Goal is to complete R&D and write a Computing TDR by end 2012

Page 48: The  SuperB  Detector

48

Milestones

11/18/2011

Page 49: The  SuperB  Detector

49

December 2010: Project Approved

• SuperB has been approved as the first in a list of 14 “flagship” projects within the new national research plan.

• The national research plan has been endorsed by “CIPE” ( the institution responsible for infrastructure long term plans).

• A financial allocation of 256 Million Euros in six years has been approved for the “SuperB Flavour Factory”.

11/18/2011

Page 50: The  SuperB  Detector

Campus of Tor Vergataabout 30000 m2 available

May 2011: SuperB @ Tor Vergata

Possible photon beamlines

Page 51: The  SuperB  Detector

Tor Vergata University campus

Site

LNF

About 4.5 Km

Page 52: The  SuperB  Detector

Ground motion measurements 100 m from highway vs requirements

(B. Bolzon et al)

• Vibration measurements on site (April2011) show «solid» ground in spite of the vicinity of the Rome-Naples Highway 100 m away

• The Highway is at higher level with respect to the site, and the traffic vibrations («cultural noise») are well damped .

Page 53: The  SuperB  Detector

The Nicola Cabibbo Laboratory• July 26: the INFN Board of directors approved:

– the MoU with the University of Tor Vergata for the collaboration aimed at the realization of the SuperB project (Nicola Cabibbo Lab) on the Tor Vergata Campus.

– the Statute of the Consortium in charge of the construction and the management of the Cabibbo Lab.

• September 28: the Minister of Research approved the Consortium (Laboratorio Nicola Cabibbo).

• October 7: Cabibbo Lab was officially registered.

Page 54: The  SuperB  Detector

54

Cabibbo Lab Governance• A Cern like organisation:

– A director general and a directorate.• Departments under director’s supervision.

– A scientific evaluation committee.• Science.• Machine.

– A finance evaluation committee.

• R. Petronzio has been appointed Director General of the Cabibbo Lab.– Directorate will be in place soon.

• Mou’s can be started immediately.– Other partners from inside/outside Italy are expected to join soon with ad

hoc Mou’s.

• Final Goal: ERIC (European Research Infrastructure Consortium)– At least 3 European Member States as initiator of ERIC.– It gives Cabibbo Lab the European rules, but it requires some time to be

established.11/18/2011

Page 55: The  SuperB  Detector

The Detector Collaboration• SuperB detector will be built by a « classical » international

collaboration.– The detector will reuse BABAR components and will cost an extra

50 M€.– INFN will cover on its own budget around 50% of this cost– ~25 M€ will therefore have to be found from international partners. – Presently participation of : Italy, Canada, France, Germany, Poland,

Russia, Spain, UK, US.

• The process to form the detector collaboration has started in June 2011.– First meeting of the protocollaboration board.– Setting up of the governance committee.– Process mostly completed by the end of the year.– No problem to join now or later.

F. Bianchi 55

Page 56: The  SuperB  Detector

London September 2011 QMUL

The First Collaboration Meeting

Page 57: The  SuperB  Detector

The SuperB Collaboration

+ Mexico + China+Ukraine

12 Nations52 Institutions252 Collaborators

…and growing. Will be formalized soon.

Page 58: The  SuperB  Detector

Documents• The Discovery Potential of a Super B Factory Slac-R-709• Physics at Super B Factory: hep-ex/0406071• SuperB report: hep-ex/0512235• SuperB Conceptual Design Report arxiv.org/abs/0709.0451• New Physics at the Super Flavor Factory

arxiv.org/abs/0810.1312• Detector Progress Report: arxiv.org/abs/1007.4241• Physics Progress Report: arxiv.org/abs/1008.1541• Accelerator Progress Report: arxiv.org/abs/1009.6178• See http://superb.infn.it

Page 59: The  SuperB  Detector

Conclusions• SuperB project has been approved by the Italian

Government.

• The site has been officially selected. The construction preparatory work has started.

• The consortium “Nicola Cabibbo Laboratory” has been formed to manage the SuperB project.

• A very ambitious and innovative machine, state-of-the art detector, and an aggressive planning.

• First beams expected in 2016.

• Come and join the fun!

F. Bianchi 59

Page 60: The  SuperB  Detector

Backup

F. Bianchi 60

Page 61: The  SuperB  Detector

Time Dependent Analysis

F. Bianchi 61

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Time Dependent Analysis: BaBar vs SuperB

Changes in two main ingredients:• Dt resolution: SuperB boost < BaBar boost -> smaller Dz, worst Dt.

– To cure this:• Add SVT layer 0, reducing SVT inner radius from 3.32 cm to 1.60 cm.• Reduce beam spot size.• Lower material budget in the beam pipe.

– Preliminary studies: Dt determined with comparable precision wrt BaBar

• Flavor tagging algorithm:– BaBar: Neural Network approach to isolate high momentum lepton and K and soft p (from

D* decay)• Figure of merit:

• etag = tagging efficiency, w=mistag probability

• Resolution on S and C:

– SuperB: expect to increase Q thanks to larger tracking coverage, improved PID, better vertexingF. Bianchi 62

2)21( we tagQ

QCS1

,

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Recoil Analysis Technique (1)

F. Bianchi 63

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Recoil Analysis Technique (2)

F. Bianchi 64

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The Golden LFV modes: t->mg, 3m

F. Bianchi 65

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LFV in t Decays with Polarization

F. Bianchi 66

t-> mg vs t->pncos(helicity)

signal

t-> mnn background

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EW Measurements

F. Bianchi 67

Page 68: The  SuperB  Detector

How the Crabbed Waist Works

F. Bianchi 68

Crab‐sextupoles off: waist line is orthogonal to the axis of the beam

Crab‐sextupoles on:waist moves parallel to the axis of other beam: maximum particle density in the overlap between bunches

All particles in both beams collide in the minimum by region, with a net luminosity gain

Page 69: The  SuperB  Detector

SuperB Parameters

Table

Baseline + other 2 options:•Lower y-emittance•Higher currents (twice bunches)

Tau/charmthreshold runningat 1035

Baseline: •Higher emittance due to IBS•Asymmetric beam currents

RF power includes SR and HOM

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Consortium Statute (1)• Main elements: (still potentially subject to be

changed on request of the Ministry)– duration: initially 6 years with possibility of continuation

for an additional period or transformation in an ERIC;– object: construction and operation of a high-luminosity

electron- positron collider, as described in the National Research Program 2011-2013

– contributions: specific Ministerial funds will support the activities of the Consortium; the partners will participate with in-kind providing resources in terms of personnel, general services infrastructure, areas. The initial share of the Consortium common fund will be: 35% UTV, 65% INFN

Page 71: The  SuperB  Detector

Consortium statute (2) • Structure of the Consortium; main elements:

– Assembly of the partners• tasks: admission of new partners; Statute modifications;

appointment of the General Director and the Area Directors; approval of the management structure proposed by the General Director; approval of budgets including the personnel plan; etc. ....

– General Director• legal representative of the Consortium, responsible for the

execution of the Consortium programs• chairs the board of Directors who manage the four areas:

– Accelerator – Research – Administration and Finance – Synchrotron light

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Consortium statute (3) • Technical-scientific advisory committee

– composed by at most 5 members appointed by the Assembly; members will have specific competence:

– in design and construction of accelerator machines (first phase)

– scientific exploitation of the laboratory (second phase)

• Financial Auditing office– three members appointed by the assembly on

indications provided by INFN, TVU and the Ministry

Page 73: The  SuperB  Detector

Budget (10 years)Construction + running Euro 650M250M from Ministry of Science+43M from Ministry of science for computing+150 M INFN co-funding+Components of PEPII from SlacExpected contribution from IIT to SuperB as a Light source machine to be defined at their meeting before the end of the year.Other in kind contribution to the accelerator mainly as a man power . Work packages Mou’s needed.

End construction