تقرير
Measurements of b-jet Nuclear Modification Factors in pPb and PbPb Collisions with CMS
| العنوان: | Measurements of b-jet Nuclear Modification Factors in pPb and PbPb Collisions with CMS |
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| المؤلفون: | Jung, Kurt |
| سنة النشر: | 2014 |
| المجموعة: | Nuclear Experiment |
| مصطلحات موضوعية: | Nuclear Experiment |
| الوصف: | We present measurements of the nuclear modification factors RAA and RpA(PYTHIA) of b jets in lead-lead and proton-lead collisions, respectively, using the CMS detector. Jets from b-quark fragmentations are found by exploiting the long lifetime of the b-quark through tagging methods using distributions of the secondary vertex displacement. From these, b-jet cross-sections are calculated and compared to the pp cross-section from the 2.76 TeV pp data collected in 2013 and to a PYTHIA simulation at 5.02 TeV, where these center-of-mass energies correspond to those of the PbPb and pPb data. We observe significant suppression for b jets in PbPb, and a RpA(PYTHIA) value consistent with unity for b jets in pPb. Results from both collision species show remarkable correspondence with inclusive-jet suppression measurements, indicating that mass-dependent energy-loss effects are negligible at pT values greater than around 50 GeV/c. We use 150 inverse {\mu}b of lead-lead data and 35 inverse nb of proton-lead data collected at the LHC. Comment: 4 pages, 3 figures, proceedings from Quark Matter 2014 |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1016/j.nuclphysa.2014.09.086 |
| URL الوصول: | http://arxiv.org/abs/1410.2576 |
| رقم الأكسشن: | edsarx.1410.2576 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1016/j.nuclphysa.2014.09.086 |
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