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Study of theB→X(3872)(→D*0D¯0)Kdecay
Aushev, T.,Zwahlen, N.,Adachi, I.,Aihara, H.,Bakich, A. M.,Balagura, V.,Bay, A.,Belous, K.,Bhardwaj, V.,Bischofberger, M.,Bondar, A.,Bozek, A.,Brodzicka, J.,Browder, T. E.,Chao, Y.,Chen, A.,Chen, P.,C American Physical Society 2010 PHYSICAL REVIEW D - Vol.81 No.3
Study of Ωc0 and Ωc∗0 baryons at Belle
Solovieva, E.,Chistov, R.,Adachi, I.,Aihara, H.,Arinstein, K.,Aushev, T.,Bakich, A.M.,Balagura, V.,Bitenc, U.,Bondar, A.,Brač,ko, M.,Brodzicka, J.,Browder, T.E.,Chang, P.,Chen, A.,Cheon, B.G.,Cho Elsevier 2009 Physics letters: B Vol.672 No.1
<P><B>Abstract</B></P><P>We report results from a study of the charmed double strange baryons Ωc0 and Ωc∗0 at Belle. The Ωc0 is reconstructed using the Ωc0→<SUP>Ω−</SUP><SUP>π+</SUP> decay mode, and its mass is measured to be (2693.6±0.3−1.5+1.8) MeV/<SUP>c2</SUP>. The Ωc∗0 baryon is reconstructed in the Ωc0γ mode. The mass difference <SUB>MΩc∗0</SUB>−<SUB>MΩc0</SUB> is measured to be (70.7±0.9−0.9+0.1) MeV/<SUP>c2</SUP>. The analysis is performed using 673 fb<SUP>−1</SUP> of data on and near the ϒ(4S) collected with the Belle detector at the KEKB asymmetric-energy <SUP>e+</SUP><SUP>e−</SUP> collider.</P>
Measurement of masses and branching ratios of Ξc+ and Ξc0 baryons
Lesiak, T.,Abe, K.,Abe, K.,Adachi, I.,Aihara, H.,Asano, Y.,Bahinipati, S.,Bakich, A.M.,Bay, A.,Bitenc, U.,Bizjak, I.,Bondar, A.,Bozek, A.,Brač,ko, M.,Brodzicka, J.,Browder, T.E.,Chao, Y.,Chen, A. Elsevier 2005 Physics letters: B Vol.605 No.3
<P><B>Abstract</B></P><P>We report a measurement of the Ξc+ and Ξc0 baryon masses, and the branching ratios for various <SUB>Ξc</SUB> decays, using 140 <SUP>fb−1</SUP> of data collected by the Belle experiment at the KEKB <SUP>e+</SUP><SUP>e−</SUP> collider. The mass splitting <SUB>mΞc0</SUB>−<SUB>mΞc+</SUB> is found to be 2.9±0.5 MeV/<SUP>c2</SUP>; this measurement is three times as precise as the current world average. We measure the branching ratios Γ(Ξc+→Λ<SUP>K−</SUP><SUP>π+</SUP><SUP>π+</SUP>)/Γ(Ξc+→<SUP>Ξ−</SUP><SUP>π+</SUP><SUP>π+</SUP>)=0.32±0.03±0.02 and Γ(Ξc0→p<SUP>K−</SUP><SUP>K−</SUP><SUP>π+</SUP>)/Γ(Ξc0→<SUP>Ξ−</SUP><SUP>π+</SUP>)=0.33±0.03±0.03, with improved precision, and measure Γ(Ξc+→pKS0KS0)/Γ(Ξc+→<SUP>Ξ−</SUP><SUP>π+</SUP><SUP>π+</SUP>)=0.087±0.016±0.014, Γ(Ξc0→Λ<SUP>K−</SUP><SUP>π+</SUP>)/Γ(Ξc0→<SUP>Ξ−</SUP><SUP>π+</SUP>)=1.07±0.12±0.07 and Γ(Ξc0→ΛKS0)/Γ(Ξc0→<SUP>Ξ−</SUP><SUP>π+</SUP>)=0.21±0.02±0.02 for the first time.</P>
Search for resonant B<sup>+</sup>/-->K<sup>+</sup>/-h->K<sup>+</sup>/-γγ decays at Belle
Belle Collaboration,Wicht, J.,Adachi, I.,Aihara, H.,Anipko, D.,Aulchenko, V.,Aushev, T.,Bakich, A.M.,Barberio, E.,Bedny, I.,Bitenc, U.,Bizjak, I.,Bondar, A.,Bozek, A.,Bracko, M.,Brodzicka, J.,Browder, North-Holland Pub. Co 2008 Physics letters: B Vol.662 No.4
We report measurements and searches for resonant B<SUP>+</SUP>/-->K<SUP>+</SUP>/-h->K<SUP>+</SUP>/-γγ decays where h is a η, η<SUP>'</SUP>, η<SUB>c</SUB>, η<SUB>c</SUB>(2S), χ<SUB>c0</SUB>, χ<SUB>c2</SUB>, J/ψ meson or the X(3872) particle. The results are based on a data sample containing 535 million BB@? pairs collected with the Belle detector at the KEKB e<SUP>+</SUP>e<SUP>-</SUP> asymmetric-energy collider operating at the @?(4S) resonance. Signals are observed in the modes with η and η<SUP>'</SUP>, and we obtain evidence for a signal in the mode with η<SUB>c</SUB>. We measure B(B<SUP>+</SUP>/-->K<SUP>+</SUP>/-η->K<SUP>+</SUP>/-γγ)=(0.87<SUB>-0.15</SUB><SUP>+0.16</SUP>(stat)<SUB>-0.07</SUB><SUP>+0.10</SUP>(syst))x10<SUP>-6</SUP>, B(B<SUP>+</SUP>/-->K<SUP>+</SUP>/-η<SUP>'</SUP>->K<SUP>+</SUP>/-γγ)=(1.40<SUB>-0.15</SUB><SUP>+0.16</SUP>(stat)<SUB>-0.12</SUB><SUP>+0.15</SUP>(syst))x10<SUP>-6</SUP> and B(B<SUP>+</SUP>/-->K<SUP>+</SUP>/-η<SUB>c</SUB>->K<SUP>+</SUP>/-γγ)=(0.22<SUB>-0.07</SUB><SUP>+0.09</SUP>(stat)<SUB>-0.02</SUB><SUP>+0.04</SUP>(syst))x10<SUP>-6</SUP>. We set upper limits on the branching fractions of the other modes.
Search for τ→eγ decay at Belle
Hayasaka, K.,Abe, K.,Abe, K.,Aihara, H.,Asano, Y.,Aushev, T.,Bahinipati, S.,Bakich, A.M.,Bedny, I.,Bitenc, U.,Bizjak, I.,Blyth, S.,Bondar, A.,Bozek, A.,Brač,ko, M.,Brodzicka, J.,Browder, T.E.,Cha Elsevier 2005 Physics letters: B Vol.613 No.1
<P><B>Abstract</B></P><P>We have searched for the lepton-flavor-violating decay τ→eγ using a data sample of 86.7 fb<SUP>−1</SUP> collected with the Belle detector at the KEKB asymmetric <SUP>e+</SUP><SUP>e−</SUP> collider. No evidence for a signal is obtained, and we set an upper limit for the branching fraction B(τ→eγ)<3.9×<SUP>10−7</SUP> at the 90% C.L.</P>
Improved measurements of the partial rate asymmetry inB→hhdecays
Chao, Y.,Chang, P.,Abe, K.,Abe, K.,Aihara, H.,Asano, Y.,Aushev, T.,Bahinipati, S.,Bakich, A. M.,Ban, Y.,Bedny, I.,Bitenc, U.,Bizjak, I.,Blyth, S.,Bondar, A.,Brač,ko, M.,Brodzicka, J.,Browder, T. American Physical Society 2005 PHYSICAL REVIEW D - Vol.71 No.3
Wang, M.-Z.,Abe, K.,Abe, K.,Aihara, H.,Asano, Y.,Aulchenko, V.,Aushev, T.,Bahinipati, S.,Bakich, A.M.,Bedny, I.,Bitenc, U.,Bizjak, I.,Bozek, A.,Brač,ko, M.,Brodzicka, J.,Browder, T.E.,Chang, M.-C Elsevier 2005 Physics letters: B Vol.617 No.3
<P><B>Abstract</B></P><P>The angular distributions of the baryon–antibaryon low-mass enhancements seen in the charmless three-body baryonic <I>B</I> decays <SUP>B+</SUP>→pp¯<SUP>K+</SUP>, <SUP>B0</SUP>→pp¯KS0 and <SUP>B0</SUP>→pΛ¯<SUP>π−</SUP> are reported. A quark fragmentation interpretation is supported, while the gluonic resonance picture is disfavored. Searches for the <SUP>Θ+</SUP> and <SUP>Θ++</SUP> pentaquarks in the relevant decay modes and possible glueball states G with 2.2 GeV/<SUP>c2</SUP><<SUB>Mpp¯</SUB><2.4 GeV/<SUP>c2</SUP> in the pp¯ systems give null results. We set upper limits on the products of branching fractions, B(<SUP>B0</SUP>→<SUP>Θ+</SUP>p¯)B(<SUP>Θ+</SUP>→pKS0)<2.3×<SUP>10−7</SUP>, B(<SUP>B+</SUP>→<SUP>Θ++</SUP>p¯)B(<SUP>Θ++</SUP>→p<SUP>K+</SUP>)<9.1×<SUP>10−8</SUP>, and B(<SUP>B+</SUP>→G<SUP>K+</SUP>)B(G→pp¯)<4.1×<SUP>10−7</SUP> at the 90% confidence level. The analysis is based on a 140 fb<SUP>−1</SUP> data sample recorded on the ϒ(4S) resonance with the Belle detector at the KEKB asymmetric energy <SUP>e+</SUP><SUP>e−</SUP> collider.</P>
Study of Decay Mechanisms inB−→Λc+p¯π−Decays and Observation of Low-Mass Structure in theΛc+p¯System
Gabyshev, N.,Abe, K.,Abe, K.,Adachi, I.,Aihara, H.,Asano, Y.,Aulchenko, V.,Aushev, T.,Bakich, A. M.,Bitenc, U.,Bizjak, I.,Blyth, S.,Bondar, A.,Bozek, A.,Brač,ko, M.,Brodzicka, J.,Browder, T. E.,C American Physical Society 2006 Physical review letters Vol.97 No.24