Search for anomalous production of highly boosted Z bosons decaying to μ+μ− in proton-proton collisions at [Formula presented] TeV
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, cilt.722, sa.1-3, ss.28-47, 2013 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 722 Sayı: 1-3
- Basım Tarihi: 2013
- Doi Numarası: 10.1016/j.physletb.2013.03.037
- Dergi Adı: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
- Sayfa Sayıları: ss.28-47
- Anahtar Kelimeler: CMS, Dimuons, Excited quarks, New phenomena, Physics
- Yıldız Teknik Üniversitesi Adresli: Evet
Özet
Results are reported from a search for the anomalous production of highly boosted Z bosons with large transverse momentum and decaying to μ+μ−. Such Z bosons may be produced in the decays of new heavy particles. The search uses pp collision data at s=7 TeV, corresponding to an integrated luminosity of 5.0 fb−1 recorded with the CMS detector. The shape of the observed transverse momentum distribution of Z bosons is consistent with standard model expectations. Constraints are obtained on models predicting the production of excited quarks decaying via electroweak processes. Assuming a compositeness scale that is equal to the excited quark mass as well as transition coupling strengths between Z bosons and excited quarks that are equal to standard model couplings to quarks, masses of excited quarks below 1.94 TeVare excluded at the 95% confidence level. For excited quark production via a novel contact interaction, masses below 2.22 TeVare excluded, even if the excited quarks do not couple to gluons.