Measurement of the absolute branching fraction of the three-body decay Λ+c→Ξ0K+π0 and search for Λ+c→nK+π0, Σ0K+π0, and ΛK+π0

For complete list of authors see http://dx.doi.org/10.1103/PhysRevD.109.052001
The Cabbibo-favored decay Λ+c→Ξ0K+π0 is studied for the first time using 6.1 fb−1 of e+e− collision data at center-of-mass energies between 4.600 and 4.840 GeV, collected with the BESIII detector at the BEPCII collider. With a double-tag method, the branching fraction of the three-body decay Λ+c→Ξ0K+π0 is measured to be (7.79±1.46±0.95)×10−3, where the first and second uncertainties are statistical and systematic, respectively. The branching fraction of the two-body decay Λ+c→Ξ(1530)0K+ is (5.99±1.04±0.32)×10−3, which is consistent with the previous result of (5.02±0.99±0.31)×10−3. In addition, the upper limit on the branching fraction of the doubly Cabbibo-suppressed decay Λ+c→nK+π0 is 7.1×10−4 at the 90% confidence level. The upper limits on the branching fractions of Λ+c→Σ0K+π0 and ΛK+π0 are also determined to be 1.8×10−3 and 2.0×10−3, respectively.

Adlarson, PatrikUppsala universitet,Kärnfysik(Swepub:uu)patad399 (författare)
Johansson, TordUppsala universitet,Kärnfysik(Swepub:uu)tordjoha (författare)
Kupsc, AndrzejUppsala universitet,Kärnfysik,Natl Ctr Nucl Res, PL-02093 Warsaw, Poland(Swepub:uu)andrkups (författare)
Schönning, Karin,1978-Uppsala universitet,Kärnfysik(Swepub:uu)kasch734 (författare)
Thorén, ViktorUppsala universitet,Kärnfysik(Swepub:uu)vikth925 (författare)
Wolke, MagnusUppsala universitet,Kärnfysik(Swepub:uu)mawol031 (författare)
Zu, J.State Key Lab Particle Detect & Elect, Beijing 100049, Peoples R China;State Key Lab Particle Detect & Elect, Hefei 230026, Peoples R China;Univ Sci & Technol China, Hefei 230026, Peoples R China (författare)
Inst High Energy Phys, Beijing 100049, Peoples R ChinaKärnfysik (creator_code:org_t)

Av författaren/redakt...: Ablikim, M.; Adlarson, Patrik; Johansson, Tord; Kupsc, Andrzej; Schönning, Karin ...; Thorén, Viktor; visa fler...; Wolke, Magnus; Zu, J.; visa färre...

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