ECAL%20%20planning%20%20towards%20%20installation%20Compilation%20from%20planning%20by%20Alexander%20Aref

1
Heavy Flavours introduction
Sergey Barsuk Laboratoire de lAccélérateur
Linéaire, Orsay
c b t ?t t
Tuesday
XLIIIth Rencontres de Moriond, QCD and High
Energy Interactions La Thuile, March 8-15, 2008
2
Sources of heavy flavour

• Present main actors
• B-factories (ee-, vs10 GeV) 1.3 ab-1
  together
• BABAR 0.5 fb-1, finishing data taking in
  April 2008
• BELLE 0.8 fb-1, reaching 1 ab-1 in 2008
• CLEOc (ee-, vs3-5 GeV) finishing data
  taking in March 2008
• Tevatron - CDF and D0 (pp, vs2 TeV)
• 3 fb-1 each, 8 fb-1 each before 2010
• Newcomers this year
• BES III (ee-, vs3-5 GeV)
• LHC(b) (exp. 10 fb-1) (pp, vs14 TeV)
• Coming later
• SuperB (exp. 10 .. 50 ab-1), SuperLHC(b),

3
Samples of heavy flavour

• b- (and c-) factories
• BABAR
• BELLE
• SuperB
• c- factories
• CLEOc
• BES
• c-, b- factories
• Tevatron (CDF and D0)
• LHC(b)

1012 Bu,d
, 106 Bs
Data scan around charmonium production
(e.g. few x107 ?(2S) decays)
1012 b-pairs/year Bu(40), Bd(40),
Bs(10), Bc(0.1), ?b(10),
4
matrix in parametrization
?
?
ß
BdBd mixing phase fdSM 2 ß
and Unitarity triangles
BsBs mixing phase fsSM -2 ? -2 ?2? -0.037
(1-l2/2)h
? 0.2 ? 0.4 ? 0.23 A 0.8
5
Current status of CKM parameters

• Impressive improvement due to results from
  B-factories and Tevatron
• The so far measurements are entirely consistent
  with the SM predictions

Accuracy of angles is limited by experiment
a 8 ß 1 ? 13 ? not yet measured
Rt
Rb
Accuracy of sides is limited by theory
1
Extraction of Vub for Rb side Lattice
calculation of for Rt side
Moriond 2008

• Improve precision of angles to further improve
  CKM consistency check
• Search for NP by comparing tree-mediated
  processes (?, Rb) to those involving loop
  diagrams (?, ß, Rt) -gt complementary
  to direct searches !

6
Game for lattice physicists release Rt
precision
7
LP2007
Big progress of lattice QCD description
QCD parameters fixed using
8
2007 New HPQCD applied to charm
2007 Improved results on decay constants fD, fDs
mc fixed from ?c(1s)
Compare to new precise direct measurements of fD,
fDs from CLEOc
Talk by Sheldon Stone, Purely leptonic decays
D(S) -gt lv at CLEO
Talk by Benjamin Haas, Charmed meson decays at
Lattice QCD
and charmonium
Mini-discussion on the lattice errors
9
NP can manifest itself via new particles or new
couplings (either in magnitude or in phase)
E.g. SUSY
New phenomena session
Exploration of two frontiers
Direct production
Appearance in loops
Crucial Center-of-mass energy
Crucial Luminosity
-gt LHC (ATLAS, CMS) -gt ILC
-gt B-factories -gt LHC(b) -gt SuperB
10
Example access to New Physics through
Tree-Penguin comparison
Tree
d,s
d,s
Bd,s
Vcs
W-
Vcb
K,F J/?
b
s
c
c
same phase
Penguin
Vtb
Vts
W-
s
b
t
F K,F
s
Bd,s
s
d,s
d,s
Naïve average of all b -gt s modes 2.2s
difference
LHCb sensitivity on d?(NP) 3o
(2fb-1)
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Saga of mixing
Mixing parameters x?m/? y??/2?
W
W
x,y
W
mixing probability 50
mixing probability 18
mixing probability 106
mixing probability 50
x,y O(1)
x 1, y ltlt 1
x gtgt 1, y O(0.1)
x,y ltlt 1
12
2006 Bs mixing
Amplitude scan
combination using A and sA
At given ?ms A 0 no oscillation A 1
oscillation
CDF only -gt signal at 5s
Talk of Gernot Weber, Bs oscillations at Tevatron
Limiting factor to extract Rt
2
B
f
D
m
B
B
2
2
2
h
r
l

-
µ
d
)
)
1
((
d
d
2
D
m
B
f
s
B
B
s
s
B physics successful at hadron machines -gt
message to LHC(b)
13
2007 DoDo mixing
x?m/? y??/2?
Methods to measure mixing parameters x(x), y(y)

1. Wrong sign tag Do flavour at production and
at decay dNws/dt ? e-?t x (x2y2)/2 ?
?2t2/2 D2DCS DDCS ? y ? ?t
Do-gt X l-v
vanishes for SL decays
-gt Semileptonic decays
x2y2
Do-gtK?-
-gt Time analysis
x2, y
Do-gtK-K and Do-gtK-?
2. Lifetime difference for
y
Do-gtKs??-
3. Time dependent Dalitz analysis
x2, y
Talk by Md Naimuddin, Masses, lifetimes and
mixings of B and D hadrons at Tevatron
14
Next step CP violation in D mesons
Vcq real gt
CPV in D system negligible in SM
O(1) CP-violating signal can provide a smoking
gun signature of NP
DD mixing established gt look for CPV in
interference mixing/decay Present sensitivity 1
level
Simple signature for CP violation
CLEO-C, BES
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Bs physics from ee- experiments Y(5S)
Belle 2005, 2006 24 fb-1 of ?(5S) data -gt
N(Bs) 2.6 x 106
Non-bbar decays of Y(5S) OZI suppressed
Extrapolating
to
expect limits but
Talk by Kai Feng Chen, New results on Y(5S)
decay at BELLE
First observation of radiative decay Bs -gt F?
?
W-
186 signal evts
s
b
t
Bs
SM BR(Bs-gtF?) (3.94 1.07 0.53)x10-5
F
-
-
s
s
Input for LHCb 104 evts/2fb-1 S/Bbb gt0.4 _at_
90 CL
?
b
Search for Bs -gt ??
SM BR10-6, can be enhanced by NP (4th quark
generation, SUSY w/broken R-parity)
Bs
W
t
BR(Bs-gt??) lt 8.6x10-6 _at_ 90CL
?
s
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Rare Decays with Large Missing Energy
1. Measurement of the B meson decay constant
36 34
fB 229 MeV
B-gt t? (Belle)
-
-
31 37
fB 216 22 MeV (unquenched lattice) HPQCD,
Phys. Rev. Lett. 95, 212001 (2005)
-
5 t decay modes
2. Sensitivity to NP from charged Higgs if the fB
is known
signal events
Extra Calorimeter Energy
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The next step B -gt D()t?
b-gt c with 2 neutrinos
t -gt e?? or p?
EPS 2007
Br () Belle BaBar SM
B--gt Do t-? 0.63 0.38 0.10 0.06 0.7
B--gt Dot-? 2.35 0.49 0.22 0.18 1.4
Bo-gt Dt-? 1.03 0.35 0.14 0.10 0.7
Bo-gt Dt-? 2.020.4-0.37 0.37 1.15 0.52 0.04 0.04 1.4
-
-
-
-
-
-
-
-
-
-
-
-
-
The next to next step B -gt K()??
_
b-gt s with 2 neutrinos
SM BR(B-gtK() vv) 10-5 .. 10-6
_
-gt SuperB statistics
Also see Talk by Tobias Huber, Phenomenology of
the rare decay B-gt Xs ll-
LHCb 104 evts/2fb-1
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Discovery of large number of charmonium-like
meson states
R-study around open charm threshold
Method ISR at B-factories
ee- machines at vs (3.7 -5) GeV -gt inclusive
ee- -gt hadrons x-section

• Comparable with energy scan
• Continuous ISR spectrum access to
  whole vs interval
• aem suppression, but 1.3/ab at
  B-factories

PDG 2006
Y(4260)
Talk by Eugeni Grauges, Recent results in ISR
production at BABAR and BELLE
Talk by Tomasz Skwarnicki, Measurements of R in
various energy regions at CLEO
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Joint effort of B-factories/CLEOc/Tevatron
X,Y,Z particles

• X(3872) -gt pp- J/? in B -gt Kpp-J/?
• X(3880) -gt DD in ee- -gt J/? DD
• Z(3930) -gt DD in ?? -gt DD
• Y(3940) -gt ?J/? in B -gt K ?J/?
• X(3940) -gt ee- -gt J/? X ee- -gt J/? DD
• X(4160) -gt DD in ee- -gt J/? DD
• Y(4260) -gt pp-J/? in ee- -gt ? pp- J/?
• Y(4325) -gt pp-? in ee- -gt ? pp-?
• Z(4430) -gt p? in B -gt Kp?

Y(4008)?
Y(4250)
Y(4370)
Y(4660)
Talk by Nicolas Arnaud, Recent
results in quarkonium at BABAR
Talk by Roberto Mussa,
Charmonium and new states at BELLE and BABAR
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• X,Y,Z interpretation not clear

_

• Two four-quark or molecular candidates the
  X(3872) and Z(4430). The Z(4430) is charged and
  so cannot be conventional charmonium (c cbar
  bound state).

_
c
c
u
u
_

• The Y(4260) and its partner Y(4320), are good
  hybrid candidates. Plus extra states nearby in
  each case.

c
c
NB The effects of thresholds and mixing between
states can easily complicate interpretations

• Theoretical efforts essential.

So far no unique model explaining X,Y,Z

• B-factories scan Upsilon region to hunt for
  exotic bottomonium-like states

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My last slide
arXiv0803.0659v1
CDF
NP parameterization
gt3s NP effect in fs
D0
LHCb sstat(fs) 0.02 (1o) in one LHCb year (2
fb-1)