کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8187885 | 1528832 | 2013 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Reassessing the importance of the colour-singlet contributions to direct J/Ï+W production at the LHC and the Tevatron
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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: Reassessing the importance of the colour-singlet contributions to direct J/Ï+W production at the LHC and the Tevatron Reassessing the importance of the colour-singlet contributions to direct J/Ï+W production at the LHC and the Tevatron](/preview/png/8187885.png)
چکیده انگلیسی
We show that the colour-singlet contributions to the hadroproduction of J/Ï in association with a W boson are sizable, if not dominant over the colour-octet contributions. They are of two kinds, sgâJ/Ï+c+W at αS3α and qq¯â²âγâ/ZâWâJ/ÏW at order α3. These have not been considered in the literature until now. Our conclusion is that the hadroproduction of a J/Ï in association with a W boson cannot be claimed as a clean probe of the colour-octet mechanism. The rate are small even at the LHC and it will be very delicate to disentangle the colour-octet contributions from the sizable colour-singlet ones and from the possibly large double-parton-scattering contributions. During this analysis, we have also noted that, for reactions such as the production of a J/Ï by light quark-antiquark fusion, the colour-singlet contribution via an off-shell photon is of the order of the expectation from the colour-octet contribution via an off-shell gluon. This is relevant for inclusive production at low energies close to the threshold. Such an observation also likely extends to other processes naturally involving light-quark annihilation.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physics Letters B - Volume 726, Issues 1â3, 7 October 2013, Pages 218-222
Journal: Physics Letters B - Volume 726, Issues 1â3, 7 October 2013, Pages 218-222
نویسندگان
J.P. Lansberg, C. Lorcé,