کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8188453 | 1528838 | 2013 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
A new limit on the CP violating decay KSâ3Ï0 with the KLOE experiment
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک هسته ای و انرژی بالا
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: A new limit on the CP violating decay KSâ3Ï0 with the KLOE experiment A new limit on the CP violating decay KSâ3Ï0 with the KLOE experiment](/preview/png/8188453.png)
چکیده انگلیسی
We have carried out a new direct search for the CP violating decay KSâ3Ï0 with 1.7 fbâ1 of e+eâ collisions collected by the KLOE detector at the Φ-factory DAΦNE. We have searched for this decay in a sample of about 5.9Ã108KSKL events tagging the KS by means of the KL interaction in the calorimeter and requiring six prompt photons. With respect to our previous search, the analysis has been improved by increasing of a factor four the tagged sample and by a more effective background rejection of fake KS tags and spurious clusters. We find no candidates in data and simulated background samples, while we expect 0.12 standard model events. Normalizing to the number of KSâ2Ï0 events in the same sample, we set the upper limit on BR(KSâ3Ï0)⩽2.6Ã10â8 at 90% C.L., five times lower than the previous limit. We also set the upper limit on the η000 parameter, |η000|⩽0.0088 at 90% C.L., improving by a factor two the latest direct measurement.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physics Letters B - Volume 723, Issues 1â3, 10 June 2013, Pages 54-60
Journal: Physics Letters B - Volume 723, Issues 1â3, 10 June 2013, Pages 54-60