Higher twist contributions to R-hadron phenomenology in the light gluino scenario
نویسنده
چکیده
The open light gluino window allows non-trivial higher-twist gluino contributions to the proton wave function. Using a two-component model originally developed for charm hadroproduction, higher-twist intrinsic gluino contributions to final-state R-hadron formation are shown to enhance leading-twist production in the forward xF region. We calculate R-hadron production at plab 800 GeV in pp, pBe, and pCu interactions with light gluino masses of 1.2, 1.5, 3.5, and 5.0 GeV. PACS: 12.38.Bx; 13.75.Ev; 14.20.Lg; 14.40.Lb
منابع مشابه
Moduli Stabilization and Supersymmetry Breaking in Deflected Mirage Mediation
We present a model of supersymmetry breaking in which the contributions from gravity/modulus, anomaly, and gauge mediation are all comparable. We term this scenario “deflected mirage mediation,” which is a generalization of the KKLT-motivated mirage mediation scenario to include gauge mediated contributions. These contributions deflect the gaugino mass unification scale and alter the pattern of...
متن کاملSignatures of the light gluino in the top quark production
If a light gluino, with a mass of the order of GeV, exists in the minimal supersymmetric extension of the Standard Model, then it can contribute to the production rate of the top quark pairs at hadron colliders via g̃g̃ → tt̄. Because the top quark is heavy, the masses of the superpartners of the lefthanded and right-handed top quarks can be very different such that a parityviolating observable ca...
متن کاملSignatures for squarks in the light gaugino scenario.
When the gluino is light and long lived, missing energy is a poor signature for both squarks and gluinos. Instead, squark pair production leads to events with ≥ 4 jets. If a chargino can decay to squark and quark, missing energy is also a poor signature for the chargino. Properties of 4-jet events originating from squarks are discussed. ALEPH’s preliminary report of an excess of 4-jet events, w...
متن کاملVery light sbottom and gluino scenario confronting electroweak precision tests
The minimal supersymmetric model with light sbottom (∼ mb) and light gluino (12 ∼ 16 GeV) can explain the excess of bottom quark production cross section at hadron colliders and has drawn much attention. We calculate one-loop contribution to Z-pole observable Rb in this scenario when large CP violating phases are allowed in the gluino mass and/or sbottom sector. We show that these large CP viol...
متن کاملHigher–twist Contributions to Fl and F2 from Instantons ∗
We study the twist–4 contribution to the unpolarized nucleon structure functions, F L and F 2 , in an approach where the vacuum structure of QCD is described by a dilute medium of instantons (¯ ρ/ ¯ R ≪ 1). The dominant power corrections come from the twist–4 quark–gluon operators and are of the order 1/(¯ ρ 2 Q 2). The contributions from four–quark operators are suppressed. The approach predic...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2000