D D 0 K K + mass spectra mass spectra for: for: B B + D D 0 D D 0 K K + B B 0 D D - D D 0 K K + B B 0 D* D* - D D 0 K K + for for 25 25 0fb 0fb -1 -1 (exp7-3 (exp7-37) Jolanta Brodzicka, Henryk Palka Jolanta Brodzicka, Henryk Palka INP INP Krakow Krakow ICPV meeteing ICPV meeteing August 5, August 5, 2004 2004 Outline : Outline : B + D D 0 D 0 K + B 0 D D - D 0 K + B 0 D* D* - D 0 K + for for 250fb 250fb -1 -1 Dalitz plots and projections Dalitz plots and projections B ackground subtracted M(D ackground subtracted M(D 0 K + ) distributions ) distributions D sJ sJ (2573) & D (2573) & D sJ sJ (2720) (2720) A ngular distrbutions ngular distrbutions
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D 0 K + mass spectra D 0 K + mass spectra for: for: B + D 0 D 0 K + B + D 0 D 0 K + B 0 D - D 0 K + B 0 D - D 0 K + B 0 D* - D 0 K + B 0 D* - D 0 K + for.
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DD00KK++ mass spectra mass spectra for:for: BB++ D D00DD00KK++
BB00 D D--DD00KK++
BB00 D* D*--DD00KK++
for for 25250fb0fb-1 -1
(exp7-3(exp7-377))
Jolanta Brodzicka, Henryk Palka Jolanta Brodzicka, Henryk Palka INP KrakowINP Krakow ICPV meeteingICPV meeteingAugust 5, August 5, 20042004
Outline :Outline : BB++ D D00DD00KK++ BB00 D D--DD00KK++ BB00 D* D*--DD00KK++ for for 250fb250fb-1-1
Dalitz plots and projectionsDalitz plots and projections
BF calculations based on 140fbBF calculations based on 140fb-1-1
JJolanta olanta BrodzickaBrodzicka, Henryk Pa, Henryk Pallkaka INP Krakow ICPV August 05, 2004INP Krakow ICPV August 05, 2004
(4160)(4160)
(3770)(3770)
DDsJsJ(2573)(2573)
M2( D0K+ )
DDsJsJ(2720)(2720)
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++
M( D0 K+ )
N /
20
MeV
N /
20
MeV
M( D0D0 )
M( D0K+ )
M2(
D0D
0 )
for signal-box events :for signal-box events : Mbc > 5.273 GeV Mbc > 5.273 GeV EE<16 MeV (~3<16 MeV (~3 ) )
LR > 0.04LR > 0.04
(3770)(3770)(4160)(4160)
(4040)(4040)
DDsJsJ(2573)(2573)
DDsJsJ(2720)(2720)
(3770)(3770) reflectionreflection
(4160) reflection possible (4160) reflection possible
N /
20
MeV
JJolanta olanta BrodzickaBrodzicka, Henryk Pa, Henryk Pallkaka INP Krakow ICPV August 05, 2004INP Krakow ICPV August 05, 2004
DDsJsJ(2720)(2720) reflectionreflection
DDsJsJ(2720) (2720) DDsJsJ(2573)(2573)
Dalitz plot and projectionsDalitz plot and projections BB00 D D--DD00KK++ M
2(
D0D
- )
M2( D0K+ )
M( D0K+ ) M( D-K+ )
M( D-D0 )
N /
20
MeV
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
DDsJsJ(2720)(2720)
DDsJsJ(2573)(2573)
BackgroundBackground normalized normalized to to number of bckgd. number of bckgd. events in events in signal boxsignal box
JJolanta olanta BrodzickaBrodzicka, Henryk Pa, Henryk Pallkaka INP Krakow ICPV August 05, 2004INP Krakow ICPV August 05, 2004
DDsJsJ(2720) (2720)
DDsJsJ(2573)(2573)
Dalitz plot and projectionsDalitz plot and projections BB00 D D**--DD00KK++ M
2 (
D0K
+ )
M2 ( D0D*- )
M( D0K+ ) M( D*-K+ )
M( D*-D0 )
N /
20
MeV
for signal-box events :for signal-box events : Mbc > 5.273 GeV E<30 MeV (~3 )
N /
20
MeV
N /
20
MeV
LR > 0.0LR > 0.00505
DDsJsJ(2720)(2720) DDsJsJ(2573)(2573)
BackgroundBackground
JJolanta olanta BrodzickaBrodzicka, Henryk Pa, Henryk Pallkaka INP Krakow ICPV August 05, 2004INP Krakow ICPV August 05, 2004
M(DM(D00KK++) ) background subtracted distributionsbackground subtracted distributions2dim 2dim MMbc bc vs.vs. E E fit fitss in in M( D M( D00KK+ + ) bins) bins B signal in M( D0K+ ) bins
fitted Signal with error M( D0K+ )
Sig
nal /
50M
eV
Sig
nal /
50M
eV
BB00 D D--DD00KK++
BB++ D D00DD00KK++
•peak at 2.720 GeV seen, no DDsJsJ(2573) (2573)
• DDsJsJ(2573) (2573)
and DDsJsJ(2720) (2720)
observedobserved
M(D0D0)>3845• (3770) (3770) region removed:
• is the (4160) (4160) contributing tocontributing to 2720 2720 peak peak?
JJolanta olanta BrodzickaBrodzicka, Henryk Pa, Henryk Pallkaka INP Krakow ICPV August 05, 2004INP Krakow ICPV August 05, 2004
BB00 D* D*--DD00KK++
Sig
nal /
50M
eV
M( D0K+ )
• DDsJsJ(2573) (2573)
and DDsJsJ(2720) (2720)
observedobserved
JJolanta olanta BrodzickaBrodzicka, Henryk Pa, Henryk Pallkaka INP Krakow ICPV August 05, 2004INP Krakow ICPV August 05, 2004
M(D0D0) for M(D0K+) > 2.9GeV ( ≡ ½ of the (4160)(4160) helicity distr.)
Sig
nal /
50
MeV
(4160)(4160)
M(D0 D0)
(4160)(4160) contribution to the 11± 5 events
Reflection shape: according to cos2 angular distribution of the polarized (4160)(4160)
M(D0 D0)
Sig
nal /
50
MeV
(4160)(4160)
(3770)(3770)
M(DM(D00DD00) background subtracted distribution) background subtracted distribution for for BB++ D D00DD00KK++
M( D0K+ ) peak at 2.7GeV contributed to the (4160)(4160) and vice versa (they overlap on Dalitz plot)
To estimate of the (4160)(4160) contribution to the 2.7GeV peak:
DDsJsJ(2720) (2720)
• rresonances described by non-relativistic Breit-Wigneresonances described by non-relativistic Breit-Wignerss• Phase Space Phase Space (nonresonant component) is described by (nonresonant component) is described by linear functionlinear function
Fits to background subtracted Fits to background subtracted D0K+ mass spectra (1)mass spectra (1)S
non-resonant component + reflection from (4160)(4160)
• 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) is used is used• Phase Space Phase Space (nonresonant component) is described by (nonresonant component) is described by linear functionlinear function
Fits to background subtracted Fits to background subtracted D0K+ mass spectra (2)mass spectra (2)S
N = N = 3232..55 ± ± 77..99 M = 25M = 257373 MeV MeV fixedfixed = 15 MeV fixed= 15 MeV fixed
DDsJsJ(2720) (2720) DDsJsJ(2573) (2573)
BB0 0 D D**--DD00KK++
M( D0K+ )
Yield M MeV MeVMeV 2/ndf
114 ±±1414
2705 ±±77 110 fixed 15/13
131 ±±2020
2710 fixed
151 ±±3434 14.5/13
138 ±±1919
2695 ±±1111 166 ±±3131 15.4/13
Fit Fit variants:variants:
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 acceptanceSignal corrected for acceptance
DDSJSJ (2573) region:(2573) region: B B0 0 D D--DD00KK+ + signal-box signal-box
LR_BLR_B used also for used also for backgroundbackground discriminationdiscrimination
equal LR_B case: larger K±_ID candidate chosen
best B candidate : with max LR_Bmax LR_B
MMDD
DD00 K K
MMDD
DD00 K3K3
MMDD
DD±± KKss
MMDD
DD±± KK MMDD
DD00 KK00
LR_DLR_D
LR_DLR_D
LR_DLR_D
LR_DLR_D LR_DLR_D
JJolanta olanta BrodzickaBrodzicka, Henryk Pa, Henryk Pallkaka INP Krakow ICPV August 05, 2004INP Krakow ICPV August 05, 2004
Background subtracted mass distributionsBackground subtracted mass distributions
BB++ D D00DD00KK++
M( D0D0 ) M( D0K+ )
wrong flavour comb.wrong flavour comb.
Sig
nal /
50M
eV
Sig
nal /
50M
eV
JJolanta olanta BrodzickaBrodzicka, Henryk Pa, Henryk Pallkaka INP Krakow ICPV August 05, 2004INP Krakow ICPV August 05, 2004
JJolanta olanta BrodzickaBrodzicka, Henryk Pa, Henryk Pallkaka INP Krakow ICPV August 05, 2004INP Krakow ICPV August 05, 2004
Angular distribution uncorrected for acceptance Angular distribution uncorrected for acceptance fitted fitted B B SignalSignal
coscos
coscoscoscos
DDSJSJ (2573) region:(2573) region: B B0 0 D D--DD00KK+ + signal-box signal-box
2.54 < M(D2.54 < M(D00KK++) < 2.6 GeV ) < 2.6 GeV
DDsJsJ (2720) region:(2720) region: B B DD DD00KK+ + signal-box signal-box
2.64 < M(D2.64 < M(D00KK++) < 2.8 GeV ) < 2.8 GeV
BB++ D D00DD00KK++ BB0 0 D D--DD00KK++
BB0 0 D D--DD00KK++
JJolanta olanta BrodzickaBrodzicka, Henryk Pa, Henryk Pallkaka INP Krakow ICPV August 05, 2004INP Krakow ICPV August 05, 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