We study the possibility of observing an ‘invisible’ Higgs boson in central exclusive diffractive production at the LHC. We evaluate the cross section using, as a simple example, the Standard Model with a heavy fourth generation, where the invisible decay mode H → ν4ν̄4 dominates, with the heavy neutrino mass M(ν4) ≃ 50 GeV. We discuss the possible requirements on trigger conditions and the back...

The decays D → V l + l − present in principle the opportunity to observe the short distance FCNC transition c → ul + l − , which is sensitive to the physics beyond the Standard Model. We analyze the D → V l + l − decays within the Standard Model, where in addition to the short distance dynamics also the long distance dynamics is present. The short distance contribution due to c → ul + l − trans...

1 I n t r o d u c t i o n The problem we address in this paper is that of a machine vision system with two cameras, sometimes called a stereo rig, to which no thro~-dimensional metric information has been made available. The only information at hand is contained in the two images. We assume that this machine vision system is capable, by comparing these two images, of establishing correspondence...

War on terrorism, as the motto which formed the cornerstone of global policies of former     neo-conservative administration of the United States, is increasingly becoming ineffective in Afghanistan with the dreaded consequence of spilling over into Pakistan. This inevitable consequence of War on    Terrorism in Afghanistan has brought the West face to face with the ‘nest of terrorism’ that CIA...

Double diffractive Higgs production at pp (or p̄p) colliders continues to attract attention as a potential signal in the search for the boson. We present improved perturbative QCD estimates of the event rates for both the exclusive and inclusive double diffractive Higgs processes, paying particular attention to the survival probability of the rapidity gaps. We find that the major uncertainty is ...

Abrupt Monsoon Transitions Exist in Paleorecords and Pertinent Models Paleoclimatic records show abrupt monsoon shifts at various different locations and historic periods (1–5). An important question is whether such transitions are possible in the future (6). To this end, we carved out the physical mechanism for such transitions in a purposefully simple conceptual model (7). Recently, Boos and ...

Case series Case 1 G.T., a 75-year-old nun, came to our observation because of an history of constipation. She had been diagnosed with a constipating-like irritable bowel syndrome, but constipation had worsened in the last months and was refractory to conventional laxatives. She was taking iron-based therapy which she was self-administrating since 3 years. She had undergone a sigmoidoscopy appr...