Indication of a deeply bound and compact K- pp state formed in the pp- -> pLambdaK+ reaction at 2.85 GeV.
Indication of a deeply bound and compact K- pp state formed in the pp- -> pLambdaK+ reaction at 2.85 GeV.
复制标题
DOI：
10.1103/physrevlett.104.132502
复制
发表时间：
2010-02
影响因子：
8.6
通讯作者：
T. Yamazaki;M. Maggiora;P. Kienle;Ken Suzuki;A. Amoroso;M. Alexeev;F. Balestra;Y. Bedfer;R. Bertini;L. Bland;A. Brenschede;F. Brochard;M. Bussa;Seonho Choi;M. Colantoni;R. Dressler;M. Dzemidzic;J. Faivre;L. Ferrero;J. Foryciarz;I. Fröhlich;V. Frolov;R. Garfagnini;A. Grasso;S. Heinz;W. Jacobs;W. Kühn;A. Maggiora;D. Panzieri;H. Pfaff;G. Pontecorvo;A. Popov;J. Ritman;P. Salabura;S. Sosio;V. Tchalyshev;S. Vigdor
中科院分区：
文献类型：
--
作者：
T. Yamazaki;M. Maggiora;P. Kienle;Ken Suzuki;A. Amoroso;M. Alexeev;F. Balestra;Y. Bedfer;R. Bertini;L. Bland;A. Brenschede;F. Brochard;M. Bussa;Seonho Choi;M. Colantoni;R. Dressler;M. Dzemidzic;J. Faivre;L. Ferrero;J. Foryciarz;I. Fröhlich;V. Frolov;R. Garfagnini;A. Grasso;S. Heinz;W. Jacobs;W. Kühn;A. Maggiora;D. Panzieri;H. Pfaff;G. Pontecorvo;A. Popov;J. Ritman;P. Salabura;S. Sosio;V. Tchalyshev;S. Vigdor
我们分析了 2.85 GeV 下 pp --> pLambdaK+ 反应的 DISTO 实验数据，以寻找 pp --> K+ + X 反应中形成的强束缚紧凑 K- pp(约 = X) 态。观察到的 K+ 缺失质量和 pLambda 不变质量（具有 p 和 K+ 的高横向动量）的光谱揭示了 26-sigma 置信度的宽阔明显峰值，其质量 M(X)=2267+/-3(stat)+/-5(syst) MeV/c2 和宽度 Gamma(X)=118+/-8(stat)+/-10(syst) MeV。巨大的横截面表明形成了具有大结合能 B(K)=103 MeV 的紧凑 K-pp，这可能是通向冷且致密的高子核物质的可能途径。
We have analyzed data of the DISTO experiment on the exclusive pp --> pLambdaK+ reaction at 2.85 GeV to search for a strongly bound compact K- pp(approximately = X) state to be formed in the pp --> K+ + X reaction. The observed spectra of the K+ missing mass and the pLambda invariant-mass with high transverse momenta of p and K+ revealed a broad distinct peak of 26-sigma confidence with a mass M(X)=2267+/-3(stat)+/-5(syst) MeV/c2 and a width Gamma(X)=118+/-8(stat)+/-10(syst) MeV. The enormously large cross section indicates formation of a compact K- pp with a large binding energy of B(K)=103 MeV, which can be a possible gateway toward cold and dense kaonic nuclear matter.