Search for dark matter and supersymmetry with a compressed mass spectrum in the vector boson fusion topology in proton-proton collisions at s =8 TeV

• Main Authors: Khachatryan, Vardan, Sirunyan, A. M., Tumasyan, A. R., Adam, Wolfgang, Asilar, Ece, Md. Ali, Mohd. Adli
• Format: Article
• Language: English; English
• Published: American Physical Society 2017
• Subjects: Q Science (General); QC Physics
• Online Access: http://irep.iium.edu.my/63065/1/63065_Search%20for%20Dark%20Matter%20and%20Supersymmetry%20_article.pdf; http://irep.iium.edu.my/63065/2/63065_Search%20for%20Dark%20Matter%20and%20Supersymmetry%20_scopus.pdf; http://irep.iium.edu.my/63065/; https://journals.aps.org/prl/pdf/10.1103/PhysRevLett.118.021802

A first search for pair production of dark matter candidates through vector boson fusion in proton-proton collisions at ffiffi s p ¼ 8 TeV is performed with the CMS detector. The vector boson fusion topology enhances missing transverse momentum, providing a way to probe supersymmetry, even in the case of a compressed mass spectrum. The data sample corresponds to an integrated luminosity of 18.5 fb−1, recorded by the CMS experiment. The observed dijet mass spectrum is consistent with the standard model expectation. In an effective field theory, dark matter masses are explored as a function of contact interaction strength. The most stringent limit on bottom squark production with mass below 315 GeV is also reported, assuming a 5 GeV mass difference with respect to the lightest neutralino.