b d (*) d (*) k jolanta brodzicka, henryk palka inp krakow b g m december 08 , 2004
DESCRIPTION
B D (*) D (*) K Jolanta Brodzicka, Henryk Palka INP Krakow B G M December 08 , 2004. Outline : On B D (*) D (*) K for 250fb -1 On D sJ (2700). B + D - D + K + B 0 D - D + K 0 S. 1 st observation. 1 st observation. B + D * - D + K + B 0 D * - D + K 0 S. - PowerPoint PPT PresentationTRANSCRIPT
B B D D(*)(*)DD(*)(*)KK
Jolanta Brodzicka, Henryk PalkaJolanta Brodzicka, Henryk Palka INP KrakowINP Krakow
BBGGMMDecemberDecember 0808, , 20042004
Outline :Outline :
OnOn B B D D(*)(*)DD(*)(*)KK for for 250fb250fb-1-1
On DOn DsJsJ(2700) (2700)
Changes since last BAMChanges since last BAM
J.BrodzickaJ.Brodzicka, , H.H.PaPallkaka INP Krakow BINP Krakow BGGM M DecemDecember ber 0808, 2004, 2004
Full data sample re-skimmed because:Full data sample re-skimmed because:
low efficiency in Dlow efficiency in DKK00 modes has been noticedmodes has been noticed
inconsistent IP cuts for svd1 and svd2 datainconsistent IP cuts for svd1 and svd2 data
Improvements obtained: Improvements obtained:
new B new B D D(*)(*)DD(*)(*)KK channelschannels observed observed
colour suppressed and usefull for CPV colour suppressed and usefull for CPV
S/B increaseS/B increase
DDsJsJ(2700) (2700) D D00KK+ + : conclusions remain valid: conclusions remain valid
BB++ D D--DD++KK++ BB00 D D--DD++KK00SS
BB++ D D**--DD++KK++ BB00 D D**--DD++KK00SS
BB++ D D**--DD*+*+KK+ + BB00 D D**--DD*+*+KK00SS (shown last year)(shown last year)
11st st observationobservation11st st observationobservation
11st st observationobservation
BB++ D D--DD++KK++
S = S = 4545..66 ±± 8.58.5
stat signif = 8.0stat signif = 8.0
N/7
MeV for Mbc>5.273 GeV for E<15MeV
N/2
.5M
eV
J.BrodzickaJ.Brodzicka, , H.H.PaPallkaka INP Krakow BINP Krakow BGGM M DecemDecember ber 0808, 2004, 2004
BB++ D D**--DD++KK++
S = S = 7373..55 ±± 9.99.9
stat signif = 12.5stat signif = 12.5
N/7
MeV
for Mbc>5.273 GeV for E<30MeV
N/2
.5M
eV
colour suppressed decayscolour suppressed decays
BB++ D D**--DD*+*+KK++ S = S = 1111..99 ±± 3.63.6
stat signif = 6.8stat signif = 6.8
N/7
MeV
E
for Mbc>5.27 GeV
Mbc
for E<25MeV
N/2
.5M
eV
11st st observationobservation
11st st observationobservation
2-2-dimdim M Mbc bc vs.vs. E unbinnedE unbinned likelihoodlikelihood fitfit used used
S = S = 6060..44 ±± 9.59.5
stat signif = 14.7stat signif = 14.7
N/7
MeV
E Mbc
for E<30MeV for Mbc >5.273 GeV
N/2
.5M
eV
J.BrodzickaJ.Brodzicka, , H.H.PaPallkaka INP Krakow BINP Krakow BGGM M DecemDecember ber 0808, 2004, 2004
BB00 D D**--DD++KK00SS
modes interesting for CPVmodes interesting for CPV
N/7
MeV
S = S = 1414..77 ±± 3.93.9
stat signif = 9.1stat signif = 9.1
for E<25MeV for Mbc >5.27 GeV
N/2
.5M
eV BB00 D D**--DD*+*+KK00
SS
S = 38.S = 38.00 ±± 8.18.1
stat signif = 7.4stat signif = 7.4
N/7
MeV for E<15MeV for Mbc >5.273 GeV
N/2
.5M
eV BB00 D D--DD++KK00
SS
11st st observationobservation
J.BrodzickaJ.Brodzicka, , H.H.PaPallkaka INP Krakow BINP Krakow BGGM M DecemDecember ber 0808, 2004, 2004
ModeSignal
for 250fb-1eff [ 10-4 ]
BF [ 10-3 ]
for 250fb-1
B+ D0D0K+ 151.5 ± 18.0
4.88 ± 0.151.13 ± 0.13 ±
0.14
B0 D-D0K+ 208.5 ± 19.0
10.10 ± 0.41
0.75 ± 0.07 ± 0.10
B+ D-D+K+ 45.6 ± 8.5 4.93 ± 0.310.34 ± 0.06 ±
x.xx
B0 D-D+K0s 38.0 ± 8.1 2.86 ± 0.180.48 ± 0.10 ±
x.xx
B+ D*-D0K+ 218.1 ± 17.8
2.55 ± 0.053.11 ± 0.35 ±
0.48
B+ D0D*+K0s
52.6 ± 9.1 0.86 ± 0.022.22 ± 0.56 ±
0.29
Preliminary
L_Sig(L_Sig(MMbc, bc, E)E) = = SS••((G (G (MMbcbc))••G(G(E)E)) + ) + SS••(G((G(MMbcbc))••G(G(E)E))) + +
SS22••(G((G(MMbcbc))••G(G(E)E)))22
L_Bckg (L_Bckg (MMbc, bc, E)E) = B = B••ARG (ARG (MMbcbc) ) •• POL_2 ( POL_2 (EE)) L= L_Sig + L_Bckg L= L_Sig + L_Bckg SS , , SS22 : regions: regions with missing with missing ,2,2
BB++ D D00DD00KK++ S = S = 151151..55 ±± 18.018.0
S = S = 208208..55 ±± 19.019.0
SS/B=0./B=0.7 7
SS/B=0.5/B=0.544
N/2
.5M
eV
N/7
MeV
E
for Mbc >5.273 GeV
N/2
.5M
eV
Mbc
for E<15MeV
Mbc
for E<15MeV N
/7M
eV
E
for Mbc >5.273 GeV
J.BrodzickaJ.Brodzicka, , H.H.PaPallkaka INP Krakow BINP Krakow BGGM M DecemDecember ber 0808, 2004, 2004
BB00 D D--DD00KK++
N/2
.5M
eV
Fitting method: Fitting method: 2-2-dimdim M Mbc bc vs.vs. E unbinned E unbinned likelihoodlikelihood fit fit
(4160)(4160)
(3770)(3770)
DDsJsJ(2573)(2573) DDsJsJ(2700)(2700)
for signal-box eventsfor signal-box events : : Dalitz plot and projections for Dalitz plot and projections for
Background:Background: ellielliptical strip ptical strip 66 to to 1010
in in MbcMbc, , EE, surrounding the signal region, surrounding the signal region
BB++ D D00DD00KK++
Mbc > 5.273 GeV Mbc > 5.273 GeV EE<15 MeV (~3<15 MeV (~3 ) )
LR > 0.04LR > 0.04
(3770)(3770)(4160)(4160)
(4040)(4040)
DDsJsJ(2573)(2573)
DDsJsJ(2700)(2700) (3770)(3770) reflectionreflection
(4160) reflection(4160) reflection
M2( D0K+ )
M( D0 K+ )
N /
20
MeV
N /
20
MeV
M( D0D0 )
M( D0K+ )
M2(
D0D
0 )
N /
20
MeV
DDsJsJ(2700)(2700) reflectionreflection
(3770)(3770) reflectionreflection
(4160)(4160) reflection reflection
DDsJsJ(2700)(2700) reflectionreflection
J.BrodzickaJ.Brodzicka, , H.H.PaPallkaka INP Krakow BINP Krakow BGGM M DecemDecember ber 0808, 2004, 2004
Background subtracted mass distributionsBackground subtracted mass distributions2dim 2dim MMbc bc vs.vs. E E fit fitss in in inv. massinv. mass bins bins B signal in mass bins
Sig
nal /
50M
eV
BB++ D D00DD00KK++
M( D0D0 ) M( D0K+ )
wrong flavour comb.wrong flavour comb.
Sig
nal /
50M
eV
Sig
nal /
50M
eV
M( D0K+ )
(4160)(4160)(3770)(3770)
DDsJsJ(2700)(2700)
J.BrodzickaJ.Brodzicka, , H.H.PaPallkaka INP Krakow BINP Krakow BGGM M DecemDecember ber 0808, 2004, 2004
Can we explainCan we explain M( D0K+ ) distributionsdistributionsby by reflections from knownreflections from known states? states?
Assumption: only (4160) in M( D0D0 ) distr. @ 4GeV region
M( D0D0 )
Sig
nal /
50M
eV
N = N = 5 54.4 ± 14.4 ± 100..88M = M = 41604160 MeV MeV fixedfixed = = 80 80 MeV MeV fixed fixed
does not explain M( D0K+ ) bump at 2.7GeV
M( D0K+ )
Sig
nal /
50M
eV
Sig
nal /
50M
eV
Sig
nal /
50M
eV N = N = 69.8 ± 11.569.8 ± 11.5
M = M = 41410000 MeV MeV fixedfixed = = 101000 MeV MeV fixed fixed
(4160) reflection
J.BrodzickaJ.Brodzicka, , H.H.PaPallkaka INP Krakow BINP Krakow BGGM M DecemDecember ber 0808, 2004, 2004
CharmoniaCharmonia
M(D0D0) for M(D0K+) > 2.97GeV
(4160) (4160) inin ½ helicity distr. 14.8 ± 6.4 events
To estimate of the (4160)(4160) contribution to the 2.7GeV peak:
((3773770) 0)
total total (4160) yield(4160) yield:: 2 27 ±7 ± 11 11 eventsevents(for 2nd half helicity distr: 20% smaller eff )(for 2nd half helicity distr: 20% smaller eff )
(4160)(4160)
Sig
nal /
50
MeV
M( D0D0 )
Sig
nal /
25
MeV
M( D0D0 )
N = N = 34.9 ± 7.234.9 ± 7.2M = 3778 MeVM = 3778 MeV fixedfixed = = 25.3 MeV 25.3 MeV fixed fixed
• rresonance described by non-relativistic Breit-Wigneresonance described by non-relativistic Breit-Wigner
• nonresonant component nonresonant component – threshold function– threshold function
M = M = 41416600 MeV MeV fixedfixed = = 8800 MeV MeV fixed fixed
(other fit variants checked)
contribution to the DDsJsJ(2700): 12 events(2700): 12 events
J.BrodzickaJ.Brodzicka, , H.H.PaPallkaka INP Krakow BINP Krakow BGGM M DecemDecember ber 0808, 2004, 2004
N = 70.0 ± 12.2N = 70.0 ± 12.2M = 271M = 27166 ± ± 1313 MeV MeV = = 13130 ± 0 ± 331 MeV 1 MeV
DDsJsJ(2700) (2700)
fitted B Signal
BB++ D D00DD00KK++
Sig
nal /
50
MeV
M( D0K+ )
reflection from (4160) (4160) (normalized to 27) (+ non-resonant component ) (interference effects – neglected)
(3770) (3770) region removed:
M(D0D0)>3845 MeV
Fit to background-free Fit to background-free D0K+ mass spectrmass spectrumum• rresonance described by non-relativistic Breit-Wigneresonance described by non-relativistic Breit-Wigner• Phase Space Phase Space (nonresonant component) is described by 3body MC PS (nonresonant component) is described by 3body MC PS • Reflection shape: (according to cosReflection shape: (according to cos22 angular di angular distribution of stribution of (4160)(4160) ) ) from MC : from MC : BB++ (4160)(4160) KK++
systematic error systematic error from from (4160) param.:(4160) param.: N: ± 4N: ± 4 M: ± 2 MeVM: ± 2 MeV : +3 -10 MeV: +3 -10 MeV
J.BrodzickaJ.Brodzicka, , H.H.PaPallkaka INP Krakow BINP Krakow BGGM M DecemDecember ber 0808, 2004, 2004
(4160) 27 ± 12 M=4160 =80MeV
(3770) 35 ± 7 M=3770 =25MeV
DsJ(2700) 70 ± 12 M=2700 =140MeV
wrong flavour comb.wrong flavour comb.Contributions from considered states:(normalized to yields)
(shapes from MC studies)
Sig
nal /
50M
eV
BB++ D D00DD00KK++
M( D0D0 )
M( D0K+ )
Sig
nal /
50M
eV
Sig
nal /
50M
eV M( D0K+ )
Explanation ofExplanation of mass spectramass spectra
(plotted by adding)
spin spin J=1J=1 assumed for assumed for DsJ(2700)DsJ(2700)
J.BrodzickaJ.Brodzicka, , H.H.PaPallkaka INP Krakow BINP Krakow BGGM M DecemDecember ber 0808, 2004, 2004
J=1 hypothesis /n.d.f = 0.1/4J=2 hypothesis/n.d.f = 8.1/4J=0 hypothesis/n.d.f = 16/4
Angular distribution Angular distribution Helicity angle Helicity angle : : angle between angle between KK++ momentum inmomentum in D D00KK++ rest frame rest frame
and and DD00KK++ momentum (the boost direction) in B rest framemomentum (the boost direction) in B rest frame
DD0K+
D0
K+
B
coscos distribution obtained using distribution obtained using
2-dim 2-dim MMbc bc vs.vs. E E fit in fit in each coseach cos bin bin (to subtract background)(to subtract background)
fitted fitted B B Signal (corrected for acceptance)Signal (corrected for acceptance)
coscos
Eff
. corr
ecte
d s
ign
al
Eff
. corr
ecte
d s
ign
al Acceptance for signal MCAcceptance for signal MC
BB+ + D D0 0 DDsJsJ(2720)(2720) (K)(K) For DDsJsJ(2720)(2720) J=1 assumedJ=1 assumedAng.distribution: Ang.distribution: coscos22
coscos
Accep
tan
ce
Accep
tan
ce
(4160) reflection
DDsJsJ (2700) region:(2700) region: B B++ D D00DD00KK+ + signal-box signal-box
2.58 < M(D2.58 < M(D00KK++) < 2.84 GeV () < 2.84 GeV (130MeV window )130MeV window )
J.BrodzickaJ.Brodzicka, , H.H.PaPallkaka INP Krakow BINP Krakow BGGM M DecemDecember ber 0808, 2004, 2004
Angular distribution of Angular distribution of K+D0D0
D0
D0
BHelicity angle Helicity angle : : angle between angle between DD00 momentum inmomentum in D D00DD00 rest frame rest frame
and and DD00DD00 momentum in B rest framemomentum in B rest frame
(4160) region:(4160) region: BB++ D D00DD00KK+ + signal-box signal-box 4.0 < M(D4.0 < M(D0 0 DD00) < 4.2 GeV () < 4.2 GeV (100MeV window )100MeV window )
Eff
. corr
ecte
d s
ign
al
Eff
. corr
ecte
d s
ign
al
coscosDsJ(2700)reflection
coscos distribution obtained using distribution obtained using 2-dim 2-dim MMbc bc vs.vs. E E fit in fit in each coseach cos
binbin (to subtract background)(to subtract background) (3770) region:(3770) region:
BB++ D D00DD00KK+ + signal-box signal-box 3.7 < M(D3.7 < M(D0 0 DD00) < 3.845 GeV ) < 3.845 GeV ((33 ) )
Eff
. corr
ecte
d s
ign
al
Eff
. corr
ecte
d s
ign
al
coscos
J.BrodzickaJ.Brodzicka, , H.H.PaPallkaka INP Krakow BINP Krakow BGGM M DecemDecember ber 0808, 2004, 2004
DDsJsJ(2700) (2700) DDsJsJ(2573)(2573)
Dalitz plot and projectionsDalitz plot and projections BB00 D D--DD00KK++ M
2(
D0D
- )
M2( D0K+ )
M( D-K+ )
M( D-D0 )
for signal-box events :for signal-box events : Mbc > 5.273 GeV E<18 MeV (~3 )
N /
20
MeV
N /
20
MeV
LR > 0.01LR > 0.01
M( D0K+ )
N /
20
MeV DDsJsJ(2700)(2700)
DDsJsJ(2573)(2573)
BackgroundBackground normalized normalized to to number of bckgd. number of bckgd. events in events in signal boxsignal box
DDsJsJ(2700)(2700) reflectionreflection
DDsJsJ(2700)(2700) reflectionreflection
J.BrodzickaJ.Brodzicka, , H.H.PaPallkaka INP Krakow BINP Krakow BGGM M DecemDecember ber 0808, 2004, 2004
BBackground subtracted mass distributionsackground subtracted mass distributions2dim 2dim MMbc bc vs.vs. E E fit fitss in in inv. massinv. mass bins bins B signal in mass bins
BB00 D D--DD00KK++
M( D0K+ )
Sig
nal /
50M
eV
M( D-K+ )M( D-D0 )
Sig
nal /
50M
eV
Sig
nal /
50M
eV
•DDsJsJ(2700) (2700) observedobserved and a shoulder ( and a shoulder (DDsJsJ(2573) (2573) ?)?)
J.BrodzickaJ.Brodzicka, , H.H.PaPallkaka INP Krakow BINP Krakow BGGM M DecemDecember ber 0808, 2004, 2004
• rresonances described by non-relativistic Breit-Wigneresonances described by non-relativistic Breit-Wignerss• DDsJsJ(2573)(2573) the convolutionthe convolution BW BW G( G(=50MeV)=50MeV) • Phase Space Phase Space (nonresonant component) is described by 3body MC PS (nonresonant component) is described by 3body MC PS
Fit to background-free Fit to background-free D0K+ mass spectrmass spectrumum
fitted B Signal
N = N = 121222..4 ± 17.94 ± 17.9M = 2710 ± 9 MeVM = 2710 ± 9 MeV = = 1127 ± 27 MeV 27 ± 27 MeV
N = 12.6 ± 4.0 N = 12.6 ± 4.0 M = 25M = 257373 MeV MeV fixedfixed = 15 MeV fixed= 15 MeV fixed
DDsJsJ(2700) (2700) DDsJsJ(2573)(2573)
BB0 0 D D--DD00KK++
Sig
nal /
50
MeV
M( D0K+ )
J.BrodzickaJ.Brodzicka, , H.H.PaPallkaka INP Krakow BINP Krakow BGGM M DecemDecember ber 0808, 2004, 2004
DsJ(2573) 13 ± 4 M=2573 =15MeV
DsJ(2700) 122 ± 18 M=2700 =140MeV
Sig
nal /
50M
eV
BB00 D D--DD00KK++
wrong flavour comb.wrong flavour comb.
Sig
nal /
50M
eV
Sig
nal /
50M
eV M( D0K+ ) M( D-D0 )
M( D-K+ )
Explanation ofExplanation of mass spectramass spectra
Contributions from considered states:(normalized to yields)
(shapes from MC studies) (plotted by
adding)
spin spin J=1J=1 assumed for assumed for DsJ(2700)DsJ(2700)
J.BrodzickaJ.Brodzicka, , H.H.PaPallkaka INP Krakow BINP Krakow BGGM M DecemDecember ber 0808, 2004, 2004
Angular distribution Angular distribution
DDsJsJ (2700) region:(2700) region: B B0 0 D D--DD00KK+ + signal-box signal-box
2.58 < M(D2.58 < M(D00KK++) < 2.84 GeV () < 2.84 GeV (130MeV window )130MeV window )
fitted fitted B B Signal (corrected for acceptance)Signal (corrected for acceptance)
BB0 0 D D--DD00KK++
coscos
coscos
Acceptance for signal MCAcceptance for signal MC BB0 0 D D-- DDsJsJ(2700)(2700) (K)(K)For DDsJsJ(2700)(2700) J=1 assumedJ=1 assumedE
ff.
corr
ecte
d s
ign
al
Eff
. corr
ecte
d s
ign
al
Accep
tan
ce
Accep
tan
ce
J.BrodzickaJ.Brodzicka, , H.H.PaPallkaka INP Krakow BINP Krakow BGGM M DecemDecember ber 0808, 2004, 2004
Summary Summary
J.BrodzickaJ.Brodzicka, , H.H.PaPallkaka INP Krakow BINP Krakow BGGM M DecemDecember ber 0808, 2004, 2004
results shown at last BAM confirmed with reanalised dataresults shown at last BAM confirmed with reanalised data
new channels observed ( 3 of them for the first time)new channels observed ( 3 of them for the first time)
publish result on publish result on DDsJsJ(2700)(2700) in B in B++ D D00DD00KK++
publish BF’spublish BF’s
write PhD thesiswrite PhD thesis
Plan Plan
Backup slidesBackup slides
J.BrodzickaJ.Brodzicka, , H.H.PaPallkaka INP Krakow BINP Krakow BGGM M DecemDecember ber 0808, 2004, 2004
J.BrodzickaJ.Brodzicka, , H.H.PaPallkaka INP Krakow BINP Krakow BGGM M DecemDecember ber 0808, 2004, 2004
ModeSignal
for 140fb-1
eff [ 10-
4 ]BF [ 10-3 ]
for 140fb-1
B+ D0D0K+ 92.6 ± 12.64.89 ± 0.13
1.25 ± 0.17 ± 0.19
B0 D-D0K+ 126.9 ± 15.3
9.70 ± 0.39
0.86 ± 0.10 ± 0.12
B+ D*-D0K+
120.9 ± 13.4 2.50 ±
0.073.19 ± 0.35 ±
0.49
B+ D0D*+K0s
24.5 ± 6.40.89 ± 0.04
1.53 ± 0.38 ± 0.20
E Mbc
J.BrodzickaJ.Brodzicka, , H.H.PaPallkaka INP Krakow BINP Krakow BGGM M DecemDecember ber 0808, 2004, 2004
BB00 D D**--DD00KK++
BB-- D D00DD**--KK00SS
S = S = 218218..11 ±± 17.817.8
S = S = 5252..66 ±± 9.19.1
SS/B=/B=1.3 1.3
SS/B=/B=1.0 1.0
selection cutsselection cuts accepted events : R2< 0.3
tracks : IP_dz< 5cm IP_dr< 0.4cm
K± : P(K/) > 0.4 ± : P(/K) > 0.1 electron veto: el_id < 0.95
K0S : M(+ -) - MKs <15MeV only good K0
s accepted
0 : E >50 MeV M( ) -M0 <15MeV
DD(**) reconstructionreconstruction D0 K, K3, K0, Ks, KK BF ~ 28% of total
D± K, Ks, KK, KsK BF ~ 12% of total
M(D)-M(DPDG) < 20MeV ( D0 K0 : -50MeV )
vertex fit (cl > 0.) and mass constraint fit applied p(D) < 2 GeV in (4S) system
D(*) ± D0 ± M(D*)-M(D)-mPDG) < 2.5MeV vertex fit (cl > 0.)
BB DD(**)DD(**)KK reconstruction reconstruction B vertex fit: with IP and B constraints
Mbc > 5.2 GeV -0.40 < E < 0.35 GeV
AnalysisAnalysis method method
J.BrodzickaJ.Brodzicka, , H.H.PaPallkaka INP Krakow BINP Krakow BGGM M DecemDecember ber 0808, 2004, 2004
Likelihood ratios:Likelihood ratios:
D probabilities (D probabilities ( LRLR_D _D ):):
LR_D ( MLR_D ( MD D ))= B(MB(MDD))
S(MS(MDD))
S(MS(MDD))++
S(MD), B(MD) parameterization from fits to data ( inclusively reconstructed D0, D± in each decay mode separately )
D plots for ~11fb-1 after preselection
p(D) < 2GeV in (4S) system
MMDD
DD00 K3K3
MMDD
DD00 K K
LR_DLR_D
MMDD
DD00 KK00 LR_DLR_D
LR_DLR_D
MMDD
DD±± KK
LR_DLR_D
MMDD
DD±± KKss
LR_DLR_D
J.BrodzickaJ.Brodzicka, , H.H.PaPallkaka INP Krakow BINP Krakow BGGM M DecemDecember ber 0808, 2004, 2004
LR_B vs. M(DLR_B vs. M(D11)*M(D)*M(D22) ) for signal box-events for signal box-events ::
BB++ D D00DD00KK++
LR
_B
M_DM_D00 * M_D * M_D00
BB00 D D--DD00KK++
M_DM_D00 * M_D * M_D--
LR
_B
B probability ( LR_B )B probability ( LR_B ):: LR_B = LR_DLR_B = LR_D11 ××
LR_DLR_D22
LR_BLR_B used for used for:: choice of best B candidatechoice of best B candidate ((withwith max max LR_BLR_B)) background discriminationbackground discrimination
J.BrodzickaJ.Brodzicka, , H.H.PaPallkaka INP Krakow BINP Krakow BGGM M DecemDecember ber 0808, 2004, 2004
LR_B cutLR_B cut(( good for background reduction good for background reduction and S/B improvementand S/B improvement ))
S /
sq
rt (
S +
B )
S /
sq
rt (
S +
B )
Signal MCSignal MC
Background:Background: M Mbcbc sideband sideband
LR_DLR_D00 * LR_D * LR_D00 cutcut
no LR_B cut
LR_B > 0.04
LR_B > 0.1
EE
for Mbc>5.27GeV
DataData
B+ D0D0K+
Signal MCSignal MC BF = 1.5 * 10 BF = 1.5 * 10-3-3 B+ D0D0K+ B+ D0D0K+
B+ D0D0K+ for for 25250fb0fb-1-1
J.BrodzickaJ.Brodzicka, , H.H.PaPallkaka INP Krakow BINP Krakow BGGM M DecemDecember ber 0808, 2004, 2004
M(D0D0) for M(D0K+) > 2.97GeV ( ≡ ½ of the (4160)(4160) helicity distr.)
(4160) fit variants(4160) fit variants
M( D0D0 )
Sig
nal /
50M
eV
M( D0D0 )
Sig
nal /
50M
eV
N = N = 23.4 ± 7.123.4 ± 7.1M = M = 41410000 MeV MeV fixedfixed = = 101000 MeV MeV fixed fixed
42 ± 1342 ± 13
N = N = 17.3 ± 7.017.3 ± 7.0M = M = 41416600 MeV MeV fixedfixed = = 101000 MeV MeV fixed fixed
31 ± 1331 ± 13
total total (4160) (4160) yieldyield
total total (4160) (4160) yieldyield
N = N = 66.3 ± 12.166.3 ± 12.1M = 2717 ± 14 M = 2717 ± 14 MeVMeV = = 133133 ± 33 MeV± 33 MeV
Sig
nal /
50M
eV
M( D0K+ )J.BrodzickaJ.Brodzicka, , H.H.PaPallkaka INP Krakow BINP Krakow BGGM M DecemDecember ber 0808, 2004, 2004
no no (4160) contribution (4160) contribution to the 2.7GeV peak:
N = N = 72.9 ± 11.772.9 ± 11.7M = 2714 ± 10 MeVM = 2714 ± 10 MeV = = 120 ± 26 MeV 120 ± 26 MeV
DDsJsJ(2700)(2700)
M( D0K+ )
Sig
nal /
50M
eV
J.BrodzickaJ.Brodzicka, , H.H.PaPallkaka INP Krakow BINP Krakow BGGM M DecemDecember ber 0808, 2004, 2004
(4160) 42 ± 13 M=4100 =100MeV
(3770) 35 ± 7 M=3770 =25MeV
DsJ(2700) 66 ± 12 M=2700 =140MeV
wrong flavour comb.wrong flavour comb.Contributions from considered states:(normalized to yields)
(shapes from MC studies)
Sig
nal /
50M
eV
BB++ D D00DD00KK++
M( D0D0 )
M( D0K+ )
Sig
nal /
50M
eV
Sig
nal /
50M
eV M( D0K+ )
Explanation ofExplanation of mass spectramass spectra
(plotted by adding)
spin spin J=1J=1 assumed for assumed for DsJ(2700)DsJ(2700)
(4160) gen. with: M=4100MeV =100MeV
J.BrodzickaJ.Brodzicka, , H.H.PaPallkaka INP Krakow BINP Krakow BGGM M DecemDecember ber 0808, 2004, 2004
Sig
nal /
50M
eV
BB++ D D00DD00KK++
M( D0D0 )
M( D0K+ )
Sig
nal /
50M
eV
Sig
nal /
50M
eV M( D0K+ )
Explanation ofExplanation of mass spectramass spectra spin spin J=0J=0 assumed for assumed for DsJ(2700)DsJ(2700)
Contributions from considered states:(normalized to yields)
(shapes from MC studies)
(plotted by adding)
(4160) 27 ± 12 M=4160 =80MeV
(3770) 35 ± 7 M=3770 =25MeV
DsJ(2700) 70 ± 12 M=2700 =140MeV
J.BrodzickaJ.Brodzicka, , H.H.PaPallkaka INP Krakow BINP Krakow BGGM M DecemDecember ber 0808, 2004, 2004
(4160) 27 ± 12 M=4160 =80MeV
(3770) 35 ± 7 M=3770 =25MeV
DsJ(2700) 70 ± 12 M=2700 =140MeV
Sig
nal /
50M
eV
BB++ D D00DD00KK++
M( D0D0 )
M( D0K+ )
Sig
nal /
50M
eV
Sig
nal /
50M
eV M( D0K+ )
Explanation ofExplanation of mass spectramass spectra spin spin J=2J=2 assumed for assumed for DsJ(2700)DsJ(2700)
Contributions from considered states:(normalized to yields)
(shapes from MC studies)
(plotted by adding)
J.BrodzickaJ.Brodzicka, , H.H.PaPallkaka INP Krakow BINP Krakow BGGM M DecemDecember ber 0808, 2004, 2004
Sig
nal /
50M
eV
BB00 D D--DD00KK++
wrong flavour comb.wrong flavour comb.
Sig
nal /
50M
eV
Sig
nal /
50M
eV M( D0K+ ) M( D-D0 )
M( D-K+ )
Explanation ofExplanation of mass spectramass spectra
Contributions from considered states:(normalized to yields)
(shapes from MC studies)
(plotted by adding)
spin spin J=0J=0 assumed for assumed for DsJ(2700)DsJ(2700)
DsJ(2573) 13 ± 4 M=2573 =15MeV
DsJ(2700) 122 ± 18 M=2700 =140MeV
J.BrodzickaJ.Brodzicka, , H.H.PaPallkaka INP Krakow BINP Krakow BGGM M DecemDecember ber 0808, 2004, 2004
DsJ(2573) 13 ± 4 M=2573 =15MeV
DsJ(2700) 122 ± 18 M=2700 =140MeV
Sig
nal /
50M
eV
BB00 D D--DD00KK++
wrong flavour comb.wrong flavour comb.
Sig
nal /
50M
eV
Sig
nal /
50M
eV M( D0K+ ) M( D-D0 )
M( D-K+ )
Explanation ofExplanation of mass spectramass spectra
Contributions from considered states:(normalized to yields)
(shapes from MC studies) (plotted by adding)
spin spin J=2J=2 assumed for assumed for DsJ(2700)DsJ(2700)
J.BrodzickaJ.Brodzicka, , H.H.PaPallkaka INP Krakow BINP Krakow BGGM M DecemDecember ber 0808, 2004, 2004
Angular distributions uncorrected for acceptanceAngular distributions uncorrected for acceptance fitted fitted B B SignalSignal
coscoscoscos
DDsJsJ (2700) region:(2700) region: B B DD DD00KK+ + signal-box signal-box
2.58 < M(D2.58 < M(D00KK++) < 2.84 GeV ) < 2.84 GeV
BB++ D D00DD00KK++ BB0 0 D D--DD00KK++
J.BrodzickaJ.Brodzicka, , H.H.PaPallkaka INP Krakow BINP Krakow BGGM M DecemDecember ber 0808, 2004, 2004
Efficiency map Efficiency map BB++ D D00DD00KK++
M2(
D0D
0 )
M2( D0K+ )
Efficiency [‰]
J.BrodzickaJ.Brodzicka, , H.H.PaPallkaka INP Krakow BINP Krakow BGGM M DecemDecember ber 0808, 2004, 2004
B B D D((**))DD((**))KK : good place to explore spectroscopy: : good place to explore spectroscopy:
b b cW cW -- c c s c c s ++ dd (uu) dd (uu) DD((**)) K from W vertexK from W vertex
BB0 0 D D--DD00KK++
Physics motivations Physics motivations
Leading quark diagrams:Leading quark diagrams:
only External diagramonly External diagram DD00KK++ is theis the only only non-exotic comb., non-exotic comb., DD**--DD0 0 have > 2q contenthave > 2q content
BB++ D D00DD00KK++
External + Internal diagrams External + Internal diagrams Both DK and DDBoth DK and DD states expected states expected DD00KK++ is exotic is exotic
_
BB0 0 D* D*--DD00KK++
J.BrodzickaJ.Brodzicka, , H.H.PaPallkaka INP Krakow BINP Krakow BGGM M DecemDecember ber 0808, 2004, 2004