115236552
Searches for exotic pentaquark baryons with hidden strangeness in experiments at the SPHINX facility
2520973
Study of the Primakoff Reactions at High Energy
In this talk the Coulomb production reactions at high energy are discussed as well as the study of electromagnetic properties of hadrons (mesons and hyperons) in these processes. The results of previous investigations are summed together with some recent data of SELEX(Fermilab) and SPHINX(IHEP) experiments.
122871438
Rare K-meson decays, standard model, and new physics
AbstractA wide program of new investigations into rare kaon decays in experiments at IHEP, Fermilab, and Brookhaven National Laboratory accelerators is reviewed. Experiments aimed at studying low-energy hadronic processes in kaon decays, searches for new types of interactions, and investigation of CP-violation processes and of extremely rare flavor-changing neutral-current 
$$K \to \pi \nu \bar \nu $$
 decays are the main components of this program. The relation of such processes to the Standard Model and new physics beyond it is discussed.
121350964
Study of the diffractive production of baryon states and search for cryptoexotic baryons with hidden strangeness
The reactions of baryon diffractive productionp+N→(pK+K−)+N, p+N→(pϕ)+N, p+N→[Λ(1520)K+]+N p+N→[Σ(1385)oK+]+N in the 70 GeV proton beam were studied. Very sensitive upper limits for the production cross sections of heavy narrow cryptoexotic baryon resonances with hidden strangeness were obtained.
125225301
Study of quark line selection rule (OZI rule) in hadron processes. 2. Search for the OZI suppressed decay B / b1 (1235) ---> phi pi0
11765363
Is it still worth searching for lepton flavor violation in rare kaon decays ?
Prospective searches for lepton flavor violation (LFV) in rare kaon decays at the existing and future intermediate-energy accelerators are considered. The proposed studies are complementary to LFV searches in muon-decay experiments and offer a unique opportunity to probe models with approximately conserved fermion-generation quantum number with sensitivity superior to that in other processes. Consequently, new searches for LFV in kaon decays are an important and independent part of the general program of searches for lepton flavor violation in the final states with charged leptons. 1 Fundamental fermion generations of the Standard Model, lepton flavors, and neutrino oscillations The Standard Model (SM) provides a good description of physics phenomena in the range of masses up to several hundred GeV. The SM includes three generations of fundamental particles – quarks and leptons: u, d, e, νe − first generation, c, s, μ, νμ − second generation, t, b, τ, ντ − third generation. (1) Strong interactions between quarks (characterized by special quantum numbers: flavors and colors) are realized by the exchange of eight types of massless colored vector gluons. These interactions are described within the framework of the modern theory of strong processes – Quantum ChromoDynamics (QCD). QCD formalism allows to perform reliable perturbative calculations at the leading or next-to-leading logarithmic order at sufficiently short An extended version of the talk given at the Chicago Flavor Seminar, February 27, 2004.
15354086
Black holes at future colliders
Abstract One of the most dramatic consequences of low-scale (∼1 TeV) quantum gravity is copious production of mini black holes at future accelerators. Hawking radiation of these black holes is constrained mainly to our (3+1)-dimensional world and results in rich phenomenology. We discuss a sensitive probe of the dimensionality of extra space, as well as an exciting possibility of finding new physics in the decays of black holes.
119113030
Searching for the Layered Structure of Space at the LHC
Alignment of the main energy fluxes along a straight line in a target plane has been observed in families of cosmic ray particles detected in the Pamir mountains. The fraction of events with alignment is statistically significant for families with superhigh energies and large numbers of hadrons. This can be interpreted as evidence for coplanar hard scattering of secondary hadrons produced in the early stages of the atmospheric cascade development. This phenomenon can be described within the recently proposed 'crystal world,' with latticized and anisotropic spatial dimensions. Planar events are expected to dominate particle collisions at a hard-scattering energy exceeding the scale {Lambda}{sub 3} at which space transitions from 3D{r_equilibrium}2D. We study specific collider signatures that will test this hypothesis. We show that the energy spectrum of Drell-Yan (DY) scattering is significantly modified in this framework. At the LHC, two jet and three jet events are necessarily planar, but four jet events can test the hypothesis. Accordingly, we study in a model-independent way the 5{sigma} discovery reach of the ATLAS and CMS experiments for identifying four jets coplanarities. For the extreme scenario in which all pp {yields} 4 jet scattering processes become coplanar above {Lambda}{sub 3}, we show that withmore » an integrated luminosity of 10(100) fb{sup -1} the LHC experiments have the potential to discover correlations between jets if {Lambda}{sub 3} {approx}< 1.25(1.6) TeV.« less
15177633
Collider Searches for Extra Spatial Dimensions and Black Holes
Searches for extra spatial dimensions remain among the most popular new directions in our quest for physics beyond the Standard Model. High-energy collider experiments of the current decade should be able to find an ultimate answer to the question of their existence in a variety of models. We review these models and recent results from the Tevatron on searches for large, inverse-TeV-size, and Randall-Sundrum extra spatial dimensions. The most dramatic consequence of low-scale (~1 TeV) quantum gravity is copious production of mini-black holes at the LHC. We discuss selected topics in the mini-black-hole phenomenology.
119251173
Vanishing Dimensions and Planar Events at the LHC
We propose that the effective dimensionality of the space we live in depends on the length scale we are probing. As the length scale increases, new dimensions open up. At short scales the space is lower dimensional; at the intermediate scales the space is three-dimensional; and at large scales, the space is effectively higher dimensional. This setup allows for some fundamental problems in cosmology, gravity, and particle physics to be attacked from a new perspective. The proposed framework, among the other things, offers a new approach to the cosmological constant problem and results in striking collider phenomenology and may explain elongated jets observed in cosmic-ray data.
18467342
Search for Exotics at the Tevatron: Present and Future
We present recent results on searches for non-SUSY new physics at the CDF and D0 Collaborations in the 1992-1996 Fermilab Tevatron run. While no compelling evidence for existence of new physics was found, the Tevatron data have excluded a significant region of the theoretically allowed phase space for a variety of non-SUSY extensions of the Standard Model. Tight limits on the existence of the following new phenomena are set: leptoquarks of all three generations, quark-lepton compositeness, 4-th generation quarks, fermiophobic Higgs, technicolor, etc. Prospects of the Tevatron experiments in Run II are discussed.