کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8187590 | 1528831 | 2013 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Evidence for s-channel single top quark production in pp¯ collisions at s=1.96 TeV
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موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک هسته ای و انرژی بالا
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
We present measurements of the cross sections for the two main production modes of single top quarks in pp¯ collisions at s=1.96 TeV in the Run II data collected with the D0 detector at the Fermilab Tevatron Collider, corresponding to an integrated luminosity of 9.7 fbâ1. The s-channel cross section is measured to be Ï(pp¯âtb+X)=1.10â0.31+0.33 pb with no assumptions on the value of the t-channel cross section. Similarly, the t-channel cross section is measured to be Ï(pp¯âtqb+X)=3.07â0.49+0.54 pb. We also measure the s+t combined cross section as Ï(pp¯âtb+X,tqb+X)=4.11â0.55+0.60 pb and set a lower limit on the CKM matrix element |Vtb|>0.92 at 95% C.L., assuming mt=172.5 GeV. The probability to measure a cross section for the s channel at the observed value or higher in the absence of signal is 1.0Ã10â4, corresponding to a significance of 3.7 standard deviations.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physics Letters B - Volume 726, Issues 4â5, 4 November 2013, Pages 656-664
Journal: Physics Letters B - Volume 726, Issues 4â5, 4 November 2013, Pages 656-664