Probing new physics viapp→W+W−→lνjjat the CERN LHC

Abstract

TeV scale new physics, e.g., large extra dimensions or models with anomalous triple vector boson couplings, can lead to excesses in various kinematic regions on the semileptonic productions of pp ! WW ! ljj at the CERN LHC, which, although suffer from large QCD background compared with the pure leptonic channel pp ! WW ! ll, can benefit from larger production rates and the reconstructable four-body mass M ljj . We study the search sensitivity through the ljj channel at the 7 TeV LHC on relevant new physics via probing the hard tails on the reconstructed M ljj and the transverse momentum of leptonically decayed W boson (P TW ), taking into account main backgrounds and including the parton shower and detector simulation effects. Our results show that with integrated luminosity of 5 fb À1 , the LHC can already discover or exclude a large parameter region of the new physics, e.g., a 95% C.L. can be set on the large extra dimensions with a cutoff scale up to 1.5 TeV, and the WWZ anomalous coupling down to, e.g., j Z j $ 0:1. Results are also given for the 8 TeV LHC.1 Searches with a monojet and missing transverse energy via graviton real emission have also been performed at CMS with 36 pb À1 of data [25], which, however, lead to rather loose limits at 95% C.L., i.e., 1.68-2.56 TeV for ¼ 6 to 2. PHYSICAL REVIEW D 86, 074010 (2012) 1550-7998= 2012=86(7)=074010 (7) 074010-1

Temporal and spatial interference in molecular above-threshold ionization with elliptically polarized fields

“…exp -Eit)n exp -Eit) (18) and is the initial velocity. Hence, the larger the initial velocity fo is, the lower the ionization rate at that ionization time will be.…”

“…In the context of linearly polarized fields and diatomic molecules, spatial-interference effects have been widely studied [9][10][11][12][13][14][15][16][17][18]. Such studies range from simplified molecular models to exact three-dimensional time-dependent calculafions.…”

Fluid Flow and Distributive Mixing Analysis in the Cavity Transfer Mixer

“…In order to analyze mixing features, two approaches are followed: Poincaré maps and the study of the evolution of a blob of fluid inside the mixer, following pioneering concepts of Hassan Aref [18,26] and Julio Ottino [27] and co-workers and later many other researchers. [22,[28][29][30][31][32][33][34][35][36][37] Through these two tools, the impact of the mentioned factors on the approximated 2D mixer efficiency is assessed. Regarding the rheological properties of the mixed fluids, the present work focuses on determining the influence of a sheardependent viscosity, by using the Carreau model.…”

Analysis of Advective–Diffusive Transport in Complex Mixing Devices by the Diffusive Mapping Method

“…A key advantage of the mapping method, besides its flexibility, is that it enables spectral analysis of the advective-diffusive transport in terms of eigenmodes of the transport operator. [31][32][33][34][35] Spectral analysis offer fundamental insights into the transport phenomena [36][37][38][39][40][41][42][43] and the mapping method makes this accessible to complex flows. Relevant in particular to mixing flows-and thus a primary topic of the study hereafter-is the correlation between advective-diffusive concentration transport and invariant Lagrangian structures in the flow field (e.g., elliptic islands and chaotic seas).…”