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Latestresultsonbeautyandcharm
2. logohadron decay at Belle II
Eiasha Waheed
20thLomonosov
ConferenceonElementary* The JSPS logo is the core component of our identity. Made up withvarious parts, thePhysics,
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August 25, 2021

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7. Logo + Abbreviation

Eiasha WAHEEDOutline• B Physics• Introduction to Belle II experiment• Recent Results• Charm Lifetime
+
+ + −
B
→
K
ℓ ℓ measurement•++• B → K νν̄ measurement(*)• ϕ3 /γ measurement with B → D h(h = K/π) decays(*)
Semileptonic
decays(Inclusive
B
→
X
ℓν
,
Exclusive
B
→
D
ℓν)
•
c
• Outlook

Eiasha WAHEED2

B Physics and B factories• Weak decays of B meson → tests of the Standard Model and its parameters.
• Determination of the weak mixing angles,• Test the unitarity of the Cabibbo- Kobayashi-Maskawa (CKM) matrix,• CP violation.
• New Physics (beyond the Standard Model)• e+e− experiments at the Υ(4S) resonance → a lot of information on heavy-quark decays• B factories: SLAC, KEK, Cornell, and DESY
• Clean environment → Efficient detection of neutrals (γ, π , η, …)
0 0
B• B̄ pairs → effective flavor tagging efficiency : ~34%(Belle II) ~5% (LHCb)• Large sample of τ leptons• Full reconstruction tagging possible → a powerful tool to measure• b→u semileptonic decays (CKM)• decays with large missing energy
0Eiasha WAHEED

3

SuperKEKB

SuperKEKB: e e @ √s ≈ 10.6 GeV
+

–

+ −
Asymmetricee collider with center-of-mass energy at BB̄
•threshold (10.58 GeV)

N

•
−1
Aims
at
an
integrated
luminosityof(50 × Belle) →Challenge50
ab•e +e − collisions very clean compared to pp collisions

harsh beam background conditions➢• Plan to deliver collisions at a peak luminosity of 6.5 × 10 cm s
• 30 × Luminosity of KEKB achieved by• × 1.5 beam current increase• × 20 beam size decrease35• Data taking till Summer run 2021: 213.49 fb-1
• Peak luminosity record: 3.1 x 1034 cm-2 s-1
Eiasha WAHEED

−2 −1



Status of Integrated Luminosity and Long
Thomas Kuhr

Planck 2021, 30.06.2021

65.8 fb-1

34.5 fb-1

Very successful
4 data taking throughout the pandemic

Current wo

I DFOUFSPGNBTT FOFSHZ NPTUMZ BU ⌥ (4S) SFTPOBODF

The Belle II Detector⇠ I ⌥ (4S) ! B + B• Designed to operate with a performance better than Belle despite higher

from π0,±, ηResistive Plate Counter (barrel outer layers)
Scintillator + WLSF + MPPC
(end-caps , inner 2 barrel layers)

CsI(Tl), waveform sampling electronics

Belle II Detector [735 collaborators, 101 institutes,
Particle Identificationelectrons (7 GeV)
23 nations] Time-of-Propagation counter (barrel)
Prox. focusing Aerogel RICH (forward)

Vertex Detector
2 layers Si Pixels (DEPFET) +4 layers Si double sided strip DSSD

of the other B to be tagged.
• Good vertex resolution• Analyses of missing mass since initial state perfectly known• Production of large sample of charm mesons and τ leptons𝛒⇠ EM Calorimeter• Neutral KL mesons efficiently reconstructed.
• Better Ks efficiency• Detection of the decay products of one B allows the flavour

Eiasha WAHEED⌥ (4S) ! B B

0

KL and muon detector

backgrounds• Belle II enables us• K/π separation compatible with Belle• High reconstruction efficiency with very low trigger bias
• Better reconstruction of final states containing photons

0

positrons (4 GeV)
Central Drift Chamber
Smaller cell size, long lever arm

Belle II TDR, arXiv:1011.0352'SBOL .FJFS%VLF 6OJWFSTJUZ

3FDFOU #FMMF ** SFTVMUT BO+ −Υ(4S) → B B ( ∼ 51.5%)
0 0

Υ(4S) → B B̄ ( ∼ 48.5%)
5

Belle II Physics “Mind Map” for Snowmass 2021
Wealth of new physics possibilities in different domains of HEP (weak, strong,
Belle II Physics Program

electroweak interactions). Manyfor initiatives
by youngscientists.
Veryopportunities
Diverse BelleII Physics
Program
Courtesy Tom Browder

Talk: "The Belle II prospects
for charmonium andbottomonium studies” by
Pavel Krokovny
Talk: "Latest results on thedark sector and tau physics at
Belle II” by Ewan Hill

The BeProg. T
arXiv:1

Topics I will cover in this talkDashed lines indicate potential extensions to SuperKEKB/Belle IIthat can enhance the physics reach of the facility
EPS-HEP 2021: Belle II Highlights and Flavour Physics in e+e-

10Eiasha extensions
WAHEED
Dashed lines indicate
to SuperKEKB/Belle II that can enhanceCharm Lifetime

At a glance- Get the decay-time (and its uncertainty) from thedisplacement between the decay vertex and theinteraction region (and the D momentum).

0/+
distribution of the decay time with
D
High-precision
measurementoflifetimes- Fit the require•⟨dD0⟩ ∼ 200 μm⟨dD+⟩ ∼ 500 μm

accurate modelling of the resolution• excellent vertex-detector alignment,
D*-tagged- Select high-purity samples of- Check,check and check… any systematic bias
calibrationof final
state
particlemomenta• Precise
0
–
+
+
–
+
+
associated to the measurement
D →K π and D →K π π decays.
+ −discrimination
Avoidbackgroundany cut thatbiases the decay time. Signal• PowerfuldecaysSignaldecayse e → cc̄
12II
datasetalready
competitive→
Challengeisto• Early- Belle
High-purity
samples,selected
to limit
background-related
systematic
uncerta
High-purity
samples,selected
to limit
background-related
systematicun
Get the decay-time (and its uncertainty) from -thecontroldisplacement
systematics between the decay vertex and the~171K–π+)π+ +)π++→D–π+π–+π)π
0 +)π
0(→K
–π
++
+(→K
+π
D*+→D
(→K
~59k
D*
(→K
~171K
D*+0→D~59k
D*→D⟨dD0⟩ ∼ 200 μm
interaction region (and the D momentum).
⟨d +⟩ ∼ 500 μm
D*+
0 of the− +decay+Fit
the
distribution
time
with
Reconstructed
and
D
→
D
(
→
K
π
)π
•

D

*+

Preliminary
Preliminary

Preliminary
Preliminary

accurateoftheresolution
0−modelling+ + 0→ D ( → K π π )π from D*− tagged.

Check,
check
andcheck…
any
systematicbias
High-purity
samples,selected
tolimitbackground•associatedtothemeasurement
related systematic uncertainty.

0.2% 0.2%
bkg bkg

9%
bkg

12

Eiasha WAHEED

7

9%
bkg

Fit Strategy for Lifetime Measurement• Unbinned maximum-likelihood fits to the (t, σt)
Lifetime
fit
−
+ +
2
[1.855,
1.833]
GeV/c
for
m(K
π
π )
•
Lifetime
fit
Lifetime
fit
Lifetimefit
2 for m(K −π +)[1.851,1.878]
GeV/c•(t,σt) distribution- -FitFittotounbinned
unbinned (t,σt) distribution
Fittounbinned(t,σ)
distributiontFittounbinned(t,σ)
distribution
0tneglected in the fit → systematic• For D : background- Background neglected forPreliminary
Preliminary

Preliminary
Preliminary

Preliminary
Preliminary

Preliminary
Preliminary
Preliminary
Preliminary

Preliminary
Preliminary
Preliminary
Preliminary

neglected for- 0Background
Backgroundneglected
for–+
Backgroundneglected
for
D D→K
it
is
modelled
0→Kπ–π,+while, while it is modelledassigned.

•

Preliminary
Preliminary

0→K––π++, while it is modelled
0+D→K π ,inwhile
is modelled
For D : backgroundD included
fit →it modeled
using

using
data
sidebands
for
using
data
sidebands
for
using
data
sidebands
for
using
data
sidebandsfordata sidebands D+→K–++
π–ππ+π+
D+D→K++→K––π++π++

D →K π π0,Resolutionfunction:→(2
gaussianfor
D•
Resolutionfunction
Resolutionfunction
1 gaussian for -D-+-) Resolution
determined
directly
fromfit
Resolution function
function0,0(2(2gaussianforD
gaussian
for
D
,
0
0
(2
gaussianforD,(2gaussianforD,
fs.gaussianfor+)+• Width: ~60-70gaussian
D
for
D
)
gaussian forfor DD++))gaussian
directlyin
data.
determined
directlyindata.
• Systematics: determined
determined directly
directlyinindata.
data.
determined
Widthof~60-70fs.
Widthof~60-70fs.
Width ofof ~60-70~60-70fs.
Widthofvertexfs.
detector• Mostly from misalignment•

Background modeling of D+
14

14

14
14

Eiasha WAHEED8

τ(D ) = 410 ± 1.1(stat) ± 0.8(syst) fs
+

+

16

τ(D )
± 0.013(stat) ± 0.007(syst) .
=2.510
τ(D 0)

cy of the measurement is tested by repeating the full418
cted according to18criteria that may potentially induce416
areresults
final
414
periods and conditions, charm mesonuch as data-taking
412,avor), and410 by varying the selection requirements and408
In all cases the observed variations ofdeband regions.
406.
istical fluctuations.
404
+
+
402
coldata-collision
e
e
using
measured
areh,lifetimes
1.5 fs and±
400 1040 ± 7 fs, respeccorresponding to an inted the first half of20002020,2010and 2020
1070
lly correlated
0between the two
Year
and
fs
0.8(syst)±
1.1(stat)
±
410.5
=
)
(D
⌧
results,e
1060
contamination
he background
are
and
date
to
precisemostworld’sthearefs,(syst)
1050
determinedoefficientsystematic uncertainties
allbe
thattoations [2]. isAssuming
1040
!
be
to
with the only exception of those due
measurements,
woderived1030
ng
which are assumed uncorrelated), the total correlation
1020%. The ratio between D+ and D0 lifetimes is derived to1010
These results demonstrate the excellent performance
2020
2010
2000
in-depth understanding
Belle II detector, and prove anYear
pact future decay-time dependent analyses of neutralCP violation.

70• Most precise to date and consistent with previous

0• Assuming all systematic uncertainties are fully correlated between τ(D )and τ(D 0) → correlation coefficient is 18%

Belle II

Belle II

9

Eiasha WAHEEDPDG2020

PDG2020

τ(D ) = 1030.4 ± 4.7(stat) ± 3.1(syst) fs

FOCUS

SELEX

FOCUS

E687

E687

CLEO

E791

CLEO

measurements• Few-per-mille accuracy establishes excellent vertex capabilityof Belle II

D0 lifetime [fs]D+ lifetime [fs]is 408.8 ± 1.2 ± 1.4 fs.

Results (preliminary)

+

+ + −

B → K ℓ ℓ Measurement
B . F ∼ 10

• Important FCNC decay measurement B → K ℓ ℓ (l = e, µ) sensitive to
and
First
Results
many SM extensions. Overview
Overview
andFirst
Results
±
± + −
±
±
+ and
+Study+ −First
of
BELLE2-NOTE-PL-2020-014
B
→
K
ℓ
ℓ
+
−
Overview
Results
Rediscovery
of
B
→
K
ℓ
ℓ
Study of B → K ℓ ℓ BELLE2-NOTE-PL-2020-014•±±+related− and missing energy variables) to suppress
BDT(eventshape,
vertex•ℓ BELLE2-NOTE-PL-2020-014
Study of B → K •ℓImportant± ± ± ±
+ +− −
to have independent measurement of FCNC decay B → K ℓ ℓ (with
+

+ + −

−7

to have
independent measurement of FCNC decay B → K ℓ ℓ (with• Importantbackground from light quark
and inclusive
B decays.
light onto
fromfrom
LHCb
arXiv:2103.11769(submitted
to Nature
Physics)ℓ = e, μℓ) -1
shed more
light results
onto results
LHCb
arXiv:2103.11769(submitted
to Nature
Physic=toe,shedμ) to more
• First observation with just 63 fb data ± ± ± + ±− + −
±
± + −
•
Rediscovery
of
:
B
→
K
ℓ
ℓ
•
Rediscovery
of
:
B
→
K
ℓ
ℓ
mportant to have independent measurement of FCNC decay B → K ℓ ℓ (with• 2D fit to ΔE = E*B − Ebeam andObserved
Observed
more lightonto
results
from
LHCb
arXiv:2103.11769(submittedtoNaturePhysics)= e, μ) to shed
+4.3 ±+4.38.62
2⃗±
0.4
8.6−3.9 0.4
Mbc = Ebeam − p B distribution−3.9± (stat./syst.)±(stat./syst.)+ −ediscovery of +4.3:
signaleventsinsignaleventsin±
Signal Yield : 8.6−3.9 0.4 events(Mbc
2D fit (2D) , ΔE)
Mbcfit, ΔE•

B →K ℓ ℓbserved• (2.7σ significane)

2 2
4+4.3 ±
Mbc4= s/(4c
)
−
p*
/c
2 2
B
Mbc = s/(4c ) − p*/c6•−3.90.4
BMore data needed for B.F measurement
,
R
,
K
*

tat./syst.)
gnal events in

ΔE* = EB −ΔE = EB −

s /2

s /2

• Available data notenoughto determine key observables
like branching fraction, isospin
10EiashaWAHEED• Available data not enough to determine key observables like branching fraction, isospin++• Complementary probe of BSM physics scenarios
proposed to explain anomalies observed in b → sℓℓ̄transitions arXiv:2005.03734, including recent measurementof RK by LHCb arXiv:2103.11769 (submitted to Nature Physics)
Complementary probe of BSM physics scenarios proposed
to ±explain±

B → K νν Measurement••

flavour anomaliesWbu, c, tWhat we can already do…⌫
Search for B→ K νν̄ arXiv:2104.12624• … but does not suffer from charm-loop contributions
±

s

⌫

⌫
Z

`

±

W
W+
ℬ(B → K νν̄) = (4.6• ±0.5) × 10−6 arXiv:1606.00916
Complementaryprobe of BSM physics scenarios
B (2020)→ K form
dominatedbyfactor,
BSM models with lepto-quarks(uncertainty[PRD 102,
015023axionsanomalies[PRD bobserved in b → sℓℓ̄ s b
proposedto],explainu, c, tsimulation weighted withtransitions
FFs arXiv:1409.4557)
arXiv:2005.03734, including recent measurement
101, 095006 (2020)], or DM [PRD 98, 055003 (2018)] can be constrainedof RK by LHCb arXiv:2103.11769 (submitted to Nature Physics)±±
Box Diagram
Flavour-changing
neutralcurrent
process
B
→
K
ν
ν̄
•
+
+
−6

± 0.5) × 10 [arXiv:1606.00919] B → Kνν= (4.6 yet• SM prediction for ℬ(B → K notνν)observed• … but does not suffer from charm-loop contributionsℬ(B neutrinos→ K νν̄) = →(4.6 ± 0.5) × 10
withtwo
(escaping)• Experimentally very challenging• Many other BSM models can be constrained like dark
±

±

−6

W

Penguin Diagram
⌫
⌫
`

π

b

→ K ±ν ν̄ and other electroweak/radiative penguin processes at Belle II | Simon Kurz, July 2021

±

±

tag

efficiency (~4%) → better compared to earlier
approaches• Many other BSM models can be constrained like dark
π PRD 102, 015023(semileptonic/hadronic tagging) usedmatter PRD 98, 055003 (2018), leptoquarks

ν su, c, t• Measured using inclusive tagging approach • Flavour-changing neutral current process B →BK νν̄Y(4S)Dnot observed
yetsignal
higher• Exploit distinct topology and kinematics to achieve
±

W+

W

K
simulation
weighted with FFs arXiv:1409.4557)(2020), axions PRD 101, 095006(2020)| Search for Bsu, c, tarXiv:1606.00916(uncertainty dominated by B → K form factor,
matter PRD
98, 055003 (2018), leptoquarks PRD 102, 015023
information of the other B mesonis required

⌫

6

Bsig

K

(2020), axions PRD 101, 095006 (2020)• Two boosted decision tree classifiers, of which the 2nd one is nested, tofight against various backgrounds| Search for B±

ν→ K ±ν ν̄ and other electroweak/radiative penguin processes at Belle II | Simon Kurz, July 2021

Eiasha WAHEED

11

6

+

+

Btag

B → K νν Measurement
D

π

Y(4S)

of event, event shape, D veto

Bsig

●

B+ → K+J/ψ(→µµ) control sample

K• Select highest pT track as signal kaon candidate• Use off-resonance data to constrain yields from continuum

ν

+

+

Validation Channel: B → K + J/ψ(→μ+μ−)

processes (qq̄, ττ̄)

Search for B±±→ K νν̄ arXiv:2104.12624+++ −• Compare
response of BDTs in data and simulation:
B
→
K
J/ψ(
→
μ
μ ) decays
Validate
BDT:
using
data
of
where
•
• Reconstruct J/ψ from two muons and remove them to mimic signal neutrinos
the muons can be removed to mimic signal• Correct kaon momentum using simulated signal events (2- vs 3-body decay)• High level of agreement:• Fraction of events in signal region (BDT2 > 0.95, data/simulation) =1.06 ± 0.10

data and simulation• Compare response of BDTs in Thomas
Kuhr• Correct kaon momentum using simulated signal events• Fraction of events in signal region (BDT2 > 0.95,
data/simulation) =1.06 ± 0.10

Planck 2021, 30.06.2021
BG-likesample(no muon
removal)| Search for B

Eiasha WAHEED±→ K ±ν ν̄ and other electroweak/radiative penguin processes at Belle II | Simon Kurz, July 2021

12

Signal-likesamplePage 19(muon removal,
momentumcorrection)11

+SM expectation:+

B → K νν Results (preliminary)
±

±

−6
±
ℬ(B → K νν̄) = (4.6 0.5) × 10

ν̄ arXiv:2104.12624

Search for B→ K νν̄ arXi

No signal observed; setting up• No signal observed; setting upper limit on BR using CLs methoding(assuming
upper limit
BR using CLs method (assuming SM signal)SMonsignal)±±−5±< (4.1 0.5) × 10 @90 % CL
• ℬ(B → K νν̄)
arXiv:2104.12624• For reinterpretation: signal efficiency as a function
When converted to the same•of the invariant mass of the dineutrino system
luminosity, this measurement isbetter thanSupplemental
semileptonic tagging by 10-20%• material
arXiv:2104.12624• hadronic tagging by a factor 3.5• Future prospects:
nic tagmore
data•Work in progress to improve the inclusive tag
Our result!
ta
0
*0
0
0
method and employ the same strategy for• additional channels B → K νν̄, B → KS νν̄)0•
Whenconverted
to
the
same
luminosity,
other
modes
B
→ K*νν̄• improved technique (neural net)*) than semiour
measurementisbetter-1• Expected to observe with ~5 ab data
leptonic tagging by 10-20%

Eiasha WAHEED

13

(*)

ϕ3 /γ Measurement with B → D h(h = K/π)

• Decays B → D K are important for precise determination CKM angle γ/ϕ3.
−0 0 + − −B→
D
(KS π π )K is the golden mode for γ/ϕ3 measurement for Belle/Belle
II.

(
)

•
Study of B oD * h−(*)0 −
0(*)+ −
B → D π provide good control sample.
• Dominant and clean decay B → D π• and
Decays BoD(*)+K are important for precise determination CKM angle J/I3.
2
2⃗
2
M
=
E
−
p
>
5.27
GeV/c
Signalenhanced
withto BK/πfromsignal B,good control sample.
oD(*)S providebc
B• Dominant and andbeam•cleanPID
decay
2
2 > 5.27 GeV
Unbinned
ML
fit
in
and
MVA
output
(with
event
shape
variables).
ΔE
=
E*
−
E
•
PID
to
K/S
from
B,
signalenhanced
with
𝑀
=
𝐸
−
(𝑃
𝑐)
beam
•
B
𝑏𝑐
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𝑏𝑒𝑎𝑚
−

(*)0

−

ϵ

−

0

0 − + −ℬ(B → D (Ks π π )K )+0.09±
= 6.32 0.81−0.11ℬ(B− → D 0(Ks0π −π +)π −)• Unbinned ML fit in 'E (= EB - Ebeam ) and MVA output (with event shape variab• Many systematics cancel in Ratio• Results agree with PDG (LHCb)
Aiming for first Belle+Belle II for
ϕ3 combined result very soon

−
0
0
−
+
−
Γ(B → D K s π π K )=0EiashaΓ(B−WAHEED→ D0 K s π− π+ π− )14

In all the 5 reconstructed modes

(heavy quark expansion, HQE)
Inclusive B → Xcℓνwill help resolve the inclusive/exclusive discrepancy in• Different analysis•strategies
Measure the spectral moments (moments of lepton energy or hadronic mass) inb → cℓν and b → uℓνorder to simultaneously determine the non perturbative elements and |Vcb| (see(momentsof lepton
or determination
hadronic mass) using
in order• Measure the q2-moments
Kevin
Olschewsky’s
talkenergy
for theq2tomoments)
simultaneously determine
perturbativeand |Vcband| the hadronic tagged analyses• Bellethe
II nonperformed
bothelements
the untagged• Belle II performed both the untagged and the hadronic tagged analyses.

Belle II Preliminary

Untagged analysis
Untagged analysis• Require one well identified lepton
leptonmissing mass and momentum to• Require one well identified• Exploit
backgrounds
momentumto reject backgrounds• Exploit missing mass andreject• Measure the BF with a fit to p*

electron momentum• Measure the branching fraction with a fit to p*lℬ(B → Xcℓν) = (9.75 ± 0.03(stat) ± 0.47(syst)) %(average of muon and electron channels)

Main uncertainty is the knowledge of
B → Xcℓn branching fractions
Eiasha WAHEED

15

Exclu(*)
untaggedapproaches
Exclusive
B →explored
D ℓν
∗"
# "
#
he channels ) → ) +$ , ) → -+Untagged
analysis(∗)
Exclusive
B
→
D
ℓn
(*)
both
taggedanduntaggedapproaches• B → D ℓν has been• explored
Fit towithcosq
distribution
indata• qBY angle between the B
BY
directionandthedirectionoftomeasurethebranchingfraction&∗()'
TaggedAnalysis• FEI
explored• Tagged analysis(+ hadronic→ , taggedℓ and/)̅ untagged approaches
Untagged
Analysis
•
0
∗"
# "
#
or
D
ℓ
system(Y):• Decays reconstructed in the channels ) → ) +$ , ) → -+•Almostbackground
free
after
tag
and
(∗)
after
tag
Signalselection
from
cos
θ
where
θ
is
• Almost zero background
•
B,Y
B,Y
Exclusive
B
→
D
ℓn
∗
&
& → , ∗( ℓ) /)signal selection ( , , ,masses,0! invariant"'
Taggedanalysis
(
+
̅
(∗)
"
→
$
%&
angle
b/w
B
and
direction
of
D*ℓ
/
D
ℓ
*
0
ExclusiveB→Dℓn∗ selection from D and D invariant• Signal•
Almostbackground
free
after
tag
and
(! > 1456)
signal selection ( , ∗, , & arXiv:2008.10299
invariant masses, system
arXiv:2008.10299

arXiv:2008.10299

and lepton•masses,
FEI hadronictaggedmomentum
and untagged approaches
explored(!∗ > 1456)• Decays reconstructed in the channels ) ∗" → ) # +$" , ) # → -+••• Fit to cosqBY distribution
BELLE2to measure the branching
fract

Untagged analysis(averageofmuon
and electron channels)
•
q
angle
betweentheBflightBY& → , ∗(
) /)• Mainof ps and MCTagged analysis(+'systematics:ℓtracking
̅
"
∗
!
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"
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Main systematics: tracking
of
p
and
MC
directionandthedirection
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"
→
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%&
s
• Almost background free after tag and consistent with the SM within 1s
0ℓ average• In agreement
with
world
∗
&
modellingorDsystem(Y):signal selection ( , , , invariant
masses,∗(In agreement with world average! > 1456)

In progress: extraction of |Vcb| from partial branching
fractions in bins of hadron recoil parameter spectrum
12• Fit to cosqBY distribution in data
• Main systematics: trackingof ps andthe
MCbranching fraction
to measuremodelling|Vcb| measurement in progress …
12 average• In agreement with world"! → $" %&Eiasha WAHEED

16

Conclusions• Belle II in great shape have already >200 fb-1 of data being analyzed → more new results
coming soon

• Established excellent vertexing performance with world’s best D lifetimes measurement.
++++• First excellent result of B → K νν with prospects to measure B → K νν very soon
• Re-optimization of Belle ϕ3 analysis ongoing → aiming for first Belle+Belle II combined result• Within the next years Belle II will be able to address the inclusive/exclusive |Vcb|/|Vub| tension
by precisely measuring semileptonic B decays• SuperKEKB has set a new world record in peak luminosity and is entering the regime of a“Super B factory”• Belle II detector is working very well and is producing very promising physics results
Looking forward to an exciting era of discoveries and a healthy competition andcomplementarity of Belle II and LHCb

Eiasha WAHEED17

Thank You
Eiasha WAHEED18