Advances in High Energy Physics
http://www.hindawi.com
The latest articles from Hindawi Publishing Corporation
© 2014 , Hindawi Publishing Corporation . All rights reserved.

Chemical Evolution of Strongly Interacting QuarkGluon Plasma
Mon, 24 Nov 2014 14:00:25 +0000
http://www.hindawi.com/journals/ahep/2014/952607/
At very initial stage of relativistic heavy ion collisions a wave of quarkgluon matter is produced from the breakup of the strong color electric field and then thermalizes at a short time scale (1 fm/c). However, the quarkgluon plasma (QGP) system is far out of chemical equilibrium, especially for the heavy quarks which are supposed to reach chemical equilibrium much late. In this paper a continuing quark production picture for strongly interacting QGP system is derived, using the quark number susceptibilities and the equation of state; both of them are from the results calculated by the WuppertalBudapest lattice QCD collaboration. We find that the densities of light quarks increase by 75% from the temperature MeV to MeV, while the density of strange quark annihilates by 18% in the temperature region. We also offer a discussion on how this late production of quarks affects the final chargecharge correlations.
YingHua Pan and WeiNing Zhang
Copyright © 2014 YingHua Pan and WeiNing Zhang. All rights reserved.

Perihelion Precession and Deflection of Light in the General Spherically Symmetric Spacetime
Mon, 24 Nov 2014 13:50:06 +0000
http://www.hindawi.com/journals/ahep/2014/604321/
The perihelion precession and deflection of light have been investigated
in the 4dimensional general spherically symmetric spacetime, and the master
equation is obtained. As the application of this master equation, the ReissnerNordstormAdS solution and CliftonBarrow solution in gravity have been taken as examples. We find that both the electric charge and gravity
can affect the perihelion precession and deflection of light, while the cosmological
constant can only effect the perihelion precession. Moreover, we clarify a subtlety
in the deflection of light in the solar system that the possible sun’s electric charge
is usually used to interpret the gap between the experiment data and theoretical
result. However, after also considering the effect from the sun’s same electric charge
on the perihelion precession of Mercury, we can find that it is not the truth.
YaPeng Hu, Hongsheng Zhang, JunPeng Hou, and LiangZun Tang
Copyright © 2014 YaPeng Hu et al. All rights reserved.

Novel Quantum Encryption Algorithm Based on Multiqubit Quantum Shift Register and Hill Cipher
Mon, 24 Nov 2014 13:24:04 +0000
http://www.hindawi.com/journals/ahep/2014/104325/
Based on a quantum shift register, a novel quantum block cryptographic algorithm
that can be used to encrypt classical messages is proposed. The message is encoded and decoded
by using a code generated by the quantum shift register. The security of this algorithm is
analysed in detail. It is shown that, in the quantum block cryptographic algorithm, two keys
can be used. One of them is the classical key that is used in the Hill cipher algorithm where
Alice and Bob use the authenticated Diffie Hellman key exchange algorithm using the concept
of digital signature for the authentication of the two communicating parties and so eliminate
the maninthemiddle attack. The other key is generated by the quantum shift register and
used for the coding of the encryption message, where Alice and Bob share the key by using
the BB84 protocol. The novel algorithm can prevent a quantum attack strategy as well as
a classical attack strategy. The problem of key management is discussed and circuits for the
encryption and the decryption are suggested.
Rifaat Zaidan Khalaf and Alharith Abdulkareem Abdullah
Copyright © 2014 Rifaat Zaidan Khalaf and Alharith Abdulkareem Abdullah. All rights reserved.

An Analytical Study of the Nonsinglet Spin Structure Function
Up to NLO in the DGLAP Approach at Small
Sun, 23 Nov 2014 12:47:23 +0000
http://www.hindawi.com/journals/ahep/2014/379823/
A nexttoleading order QCD calculation of nonsinglet spin structure function at small is presented using the analytical methods: Lagrange’s method and method of characteristics.
The compatibility of these analytical approaches is tested by comparing the analytical solutions with the available polarized global fits.
Neelakshi N. K. Borah and D. K. Choudhury
Copyright © 2014 Neelakshi N. K. Borah and D. K. Choudhury. All rights reserved.

Equal Area Laws and Latent Heat for Dimensional RNAdS Black Hole
Wed, 19 Nov 2014 09:39:22 +0000
http://www.hindawi.com/journals/ahep/2014/816728/
We study the equal area laws of dimensional RNAdS black hole. We choose two kinds of phase diagrams, and . We employ the equal area laws to find an isobar which is the real twophase coexistence line. Our calculation is much simpler to derive the critical value of the thermodynamic quantities. According to the thermodynamic quantities, we also study the latent heat of the black hole.
LiChun Zhang, HuiHua Zhao, Ren Zhao, and MengSen Ma
Copyright © 2014 LiChun Zhang et al. All rights reserved.

The Effect of Nuclear Elastic Scattering on Temperature Equilibration Rate of Ions in Fusion Plasma
Mon, 17 Nov 2014 00:00:00 +0000
http://www.hindawi.com/journals/ahep/2014/739491/
A plasma with two different particle types and at different temperatures has been considered, so that each type of ion with MaxwellBoltzmann distribution function is in temperature equilibrium with itself. Using the extracted nuclear elastic scattering differential crosssection from experimental data, solving the Boltzmann equation, and also taking into account the mobility of the background particles, temperature equilibration rate between two different ions in a fusion plasma is calculated. The results show that, at higher temperature differences, effect of nuclear elastic scattering is more important in calculating the temperature equilibration rate. The obtained expressions have general form so that they are applicable to each type of particle for background () and each type for projectile (). In this paper, for example, an equimolar DeuteriumHydrogen plasma with density cm−3 is chosen in which the deuteron is the background particle with temperature (also electron temperature) keV (usual conditions for a fusion plasma at the ignition instant) and the proton is the projectile with temperature . These calculations, particularly, are very important for ion fast ignition in inertial confinement fusion concept.
M. Mahdavi, R. Azadifar, and T. Koohrokhi
Copyright © 2014 M. Mahdavi et al. All rights reserved.

Extracting the QCD Cutoff Parameter Using the Bernstein Polynomials and the Truncated Moments
Tue, 11 Nov 2014 12:16:24 +0000
http://www.hindawi.com/journals/ahep/2014/304369/
Since there are not experimental data over the whole range of Bjorken variable, that is, , we are inevitable in practice to do the integration for Mellin moments over the available range of experimental data. Among the methods of analysing DIS data, there are the methods based on application of Mellin moments. We use the truncated Mellin moments rather than the usual moments to analyse the EMC collaboration data for muonnucleon and WA25 data for neutrinodeuterium DIS scattering. How to connect the truncated Mellin moments to usual ones is discussed. Following that we combine the truncated Mellin moments with the Bernstein polynomials. As a result, Bernstein averages which are related to different orders of the truncated Mellin moment are obtained. These averaged quantities can be considered as the constructed experimental data. By accessing the sufficient experimental data we can do the fitting more precisely. We do the fitting at leading order and nexttoleading order approximations to extract the QCD cutoff parameter. The results are in good agreement with what is being expected.
A. Mirjalili, M. M. Yazdanpanah, and Z. Moradi
Copyright © 2014 A. Mirjalili et al. All rights reserved.

Field Equations and Radial Solutions in a Noncommutative Spherically Symmetric Geometry
Tue, 11 Nov 2014 10:23:12 +0000
http://www.hindawi.com/journals/ahep/2014/349659/
We study a noncommutative theory of gravity in the framework of torsional spacetime. This theory is based on a Lagrangian obtained by applying the technique of dimensional reduction of noncommutative gauge theory and that the yielded diffeomorphism invariant field theory can be made equivalent to a teleparallel formulation of gravity. Field equations are derived in the framework of teleparallel gravity through Weitzenbock geometry. We solve these field equations by considering a mass that is distributed spherically symmetrically in a stationary static spacetime in order to obtain a noncommutative line element. This new line element interestingly reaffirms the coherent state theory for a noncommutative Schwarzschild black hole. For the first time, we derive the Newtonian gravitational force equation in the commutative relativity framework, and this result could provide the possibility to investigate examples in various topics in quantum and ordinary theories of gravity.
Aref Yazdani
Copyright © 2014 Aref Yazdani. All rights reserved.

Probing the Top Quark FlavourChanging Neutral Current at a Future ElectronPositron Collider
Mon, 03 Nov 2014 07:11:07 +0000
http://www.hindawi.com/journals/ahep/2014/476490/
We present a study to examine the sensitivity of a future collider to the anomalous top flavourchanging neutral current (FCNC) to the gluon. To separate signal from background a multivariate analysis is performed on top quark pair and background events, where one top quark is considered to follow the dominant standard model (SM) decay, , and the other top decays through FCNC, , where is a  or a quark. The analysis of fully hadronic FCNC decay of the pair is also presented. The 95% confidence level limits on the top quark anomalous couplings are obtained for different values of the centerofmass energies and integrated luminosities.
Hoda Hesari, Hamzeh Khanpour, Morteza Khatiri Yanehsari, and Mojtaba Mohammadi Najafabadi
Copyright © 2014 Hoda Hesari et al. All rights reserved.

Correspondence of Modified Gravity with Scalar Field Models
Sun, 02 Nov 2014 08:01:34 +0000
http://www.hindawi.com/journals/ahep/2014/594781/
This paper is devoted to study the scalar field dark energy models by taking its different aspects in the framework of gravity. We consider flat FRW universe to construct the equation of state parameter governed by gravity. The stability of the model is discussed with the help of squared speed of sound parameter. It is found that models show quintessence behavior of the universe in stable as well as unstable modes. We also develop the correspondence of model with some scalar field dark energy models like quintessence, tachyonic field, kessence, dilaton, hessence, and DBIessence. The nature of scalar fields and corresponding scalar potentials is being analyzed in gravity graphically which show consistency with the present day observations about accelerated phenomenon.
Abdul Jawad and Ujjal Debnath
Copyright © 2014 Abdul Jawad and Ujjal Debnath. All rights reserved.

Fractional Quantum Field Theory: From Lattice to Continuum
Thu, 30 Oct 2014 10:20:33 +0000
http://www.hindawi.com/journals/ahep/2014/957863/
An approach to formulate fractional field theories on unbounded lattice spacetime is suggested. A fractionalorder analog of the lattice quantum field theories is considered. Lattice analogs of the fractionalorder 4dimensional differential operators are proposed. We prove that continuum limit of the suggested lattice field theory gives a fractional field theory for the continuum 4dimensional spacetime. The fractional field equations, which are derived from equations for lattice spacetime with longrange properties of powerlaw type, contain the Riesz type derivatives on noninteger orders with respect to spacetime coordinates.
Vasily E. Tarasov
Copyright © 2014 Vasily E. Tarasov. All rights reserved.

Investigation of the Rare Exclusive Decays in the Framework of the QCD Sum Rules
Mon, 27 Oct 2014 08:49:23 +0000
http://www.hindawi.com/journals/ahep/2014/503049/
Exclusive decay is studied in the framework of the threepoint QCD sum rules approach. The two gluon condensate contributions to the correlation function are calculated and the form factors of this transition are found. The decay width and total branching ratio for this decay are also calculated.
V. Bashiry
Copyright © 2014 V. Bashiry. All rights reserved.

Development of a Liquid Scintillator Using Water for a Next Generation Neutrino Experiment
Mon, 27 Oct 2014 00:00:00 +0000
http://www.hindawi.com/journals/ahep/2014/327184/
A feasibility study on a new type of liquid scintillator based on water has been performed. Mainly due to the differences in polarities between water and oil, organic solvents are not mixed in water. In order to make a liquid scintillator based on water, a surfactant that contains hydrophilic and hydrophobic groups is used. The surfactant keeps water and organic solvents apart in solution. Good physical and optical parameters and longterm stability are required to use liquid scintillator based on water in massive detector for the next generation neutrino experiments. In this paper, we report the characteristics and the possibility of liquid scintillators using water with various new surfactants.
Sun Heang So, Kyung Kwang Joo, Ba Ro Kim, Bong Keon Kim, Seung Chan Kim, Chang Dong Shin, and In Sung Yeo
Copyright © 2014 Sun Heang So et al. All rights reserved.

Spherically Symmetric Solution in (1+4)Dimensional Gravity Theories
Thu, 23 Oct 2014 13:06:24 +0000
http://www.hindawi.com/journals/ahep/2014/830109/
A nondiagonal spherically symmetric tetrad field, involving four unknown functions of radial coordinate plus an angle , which is a generalization of the azimuthal angle , is applied to the field equations of (1+4)dimensional gravity theory. A special vacuum solution with one constant of integration is derived. The physical meaning of this constant is shown to be related to the gravitational mass of the system and the associated metric represents Schwarzschild in (1+4)dimension. The scalar torsion related to this solution vanishes. We put the derived solution in a matrix form and rewrite it as a product of three matrices: the first represents a rotation while the second represents an inertia and the third matrix is the diagonal square root of Schwarzschild spacetime in (1+4)dimension.
Gamal G. L. Nashed
Copyright © 2014 Gamal G. L. Nashed. All rights reserved.

Identification of Parton Pairs in a Dijet Event and Investigation of Its Effects on Dijet Resonance Search
Tue, 21 Oct 2014 00:00:00 +0000
http://www.hindawi.com/journals/ahep/2014/719216/
Being able to distinguish parton pair type in a dijet event could significantly improve the search for new particles that are predicted by the theories beyond the Standard Model at the Large Hadron Collider. To explore whether parton pair types manifesting themselves as a dijet event could be distinguished on an eventbyevent basis, I performed a simulation based study considering observable jet variables. I found that using a multivariate approach can filter out about 80% of the other parton pairs while keeping more than half of the quarkquark or gluongluon parton pairs in an inclusive QCD dijet distribution. The effects of eventbyevent parton pair tagging for dijet resonance searches were also investigated and I found that improvement on signal significance after applying parton pair tagging can reach up to 4 times for gluongluon resonances.
Sertac Ozturk
Copyright © 2014 Sertac Ozturk. All rights reserved.

Langevin Diffusion in Holographic Backgrounds with Hyperscaling Violation
Mon, 20 Oct 2014 09:09:02 +0000
http://www.hindawi.com/journals/ahep/2014/670598/
We consider a relativistic heavy quark which moves in the quarkgluon plasmas. By using the holographic methods, we analyze the Langevin diffusion process of this relativistic heavy quark. This heavy quark is described by a trailing string attached to a flavor brane and moving at constant velocity. The fluctuations of this string are related to the thermal correlators and the correlation functions are precisely the kinds of objects that we compute in the gravity dual picture. We obtain the action of the trailing string in hyperscaling violation backgrounds and we then find the equations of motion. These equations lead us to constructing the Langevin correlator which helps us to obtain the Langevin constants. Using the Langevin correlators we derive the spectral densities and simple analytic expressions in the small and largefrequency limits. We examine our works for planar and charged black holes with hyperscaling violation and find new constraints on in the presence of velocity .
J. Sadeghi and F. Pourasadollah
Copyright © 2014 J. Sadeghi and F. Pourasadollah. All rights reserved.

Rotating Dilaton Black Strings Coupled to Exponential Nonlinear Electrodynamics
Mon, 20 Oct 2014 00:00:00 +0000
http://www.hindawi.com/journals/ahep/2014/615041/
We construct a new class of charged rotating black string solutions coupled to dilaton and exponential nonlinear electrodynamic fields with cylindrical or toroidal horizons in the presence of a Liouvilletype potential for the dilaton field. Due to the presence of the dilaton field, the asymptotic
behaviors of these solutions are neither flat nor (A)dS. We analyze the physical properties of the solutions in detail. We compute the conserved and thermodynamic quantities of the solutions and verify the first law of thermodynamics on the black string horizon. When the nonlinear parameter goes to infinity, our results reduce to those of black string solutions in EinsteinMaxwelldilaton gravity.
Ahmad Sheykhi
Copyright © 2014 Ahmad Sheykhi. All rights reserved.

Effects of Noncommutativity on the Black Hole Entropy
Thu, 16 Oct 2014 08:42:46 +0000
http://www.hindawi.com/journals/ahep/2014/139172/
The BTZ black hole geometry is probed with a noncommutative scalar field which obeys the κMinkowski algebra. The entropy of the BTZ black hole is calculated using the brick wall method. The contribution of the noncommutativity to the black hole entropy is explicitly evaluated up to the first order in the deformation parameter. We also argue that such a correction to the black hole entropy can be interpreted as arising from the renormalization of the Newton’s constant due to the effects of the noncommutativity.
Kumar S. Gupta, E. Harikumar, Tajron Jurić, Stjepan Meljanac, and Andjelo Samsarov
Copyright © 2014 Kumar S. Gupta et al. All rights reserved.

Spinless Particles in Exponentially Varying Electric and Magnetic Fields
Wed, 15 Oct 2014 08:26:25 +0000
http://www.hindawi.com/journals/ahep/2014/493120/
We investigate the motion of the charged spin0 particles subjected to the spacedependent electric and magnetic fields. By selecting the external fields oriented parallel and orthogonal to each other, exact solutions of the motion are obtained for the nonrelativistic and the relativistic cases. The quantized energy spectrum is determined by using the solutions obtained for the motion of the particles and dependence of the energy on the strengths of the electric and magnetic fields is discussed. We compared the energy spectrum of the nonrelativistic and the relativistic particles by using the numerical results obtained for the first few quantum levels.
Kenan Sogut and Ali Havare
Copyright © 2014 Kenan Sogut and Ali Havare. All rights reserved.

Classical Bianchi Type I Cosmology in KEssence Theory
Tue, 14 Oct 2014 08:20:47 +0000
http://www.hindawi.com/journals/ahep/2014/805164/
We use one of the simplest forms of the Kessence theory and we apply it to the classical anisotropic Bianchi type I cosmological model, with a barotropic perfect fluid () modeling the usual matter content and with cosmological constant . Classical exact solutions for any and are found in closed form, whereas solutions for are found for particular values in the barotropic parameter. We present the possible isotropization of the cosmological model Bianchi I using the ratio between the anisotropic parameters and the volume of the universe. We also include a qualitative analysis of the analog of the Friedmann equation.
J. Socorro, Luis O. Pimentel, and Abraham EspinozaGarcía
Copyright © 2014 J. Socorro et al. All rights reserved.

Probing Features of the LeeWick Quantum Electrodynamics
Mon, 13 Oct 2014 11:43:11 +0000
http://www.hindawi.com/journals/ahep/2014/153953/
We discuss some aspects concerning the electromagnetic sector of the abelian LeeWick (LW) quantum electrodynamics (QED). Using the Dirac’s theory of constrained systems, the higherorder canonical quantization of the LW electromagnetism is performed. A quantum bound on the LW heavy mass is also estimated using the best known measurement of the anomalous magnetic moment of the electron. Finally, it is shown that magnetic monopoles can coexist peacefully in the LW scenario.
R. Turcati and M. J. Neves
Copyright © 2014 R. Turcati and M. J. Neves. All rights reserved.

Semileptonic Transition of Tensor to Meson
Mon, 13 Oct 2014 07:15:18 +0000
http://www.hindawi.com/journals/ahep/2014/252795/
Taking into account the twogluon condensate corrections, the transition form factors of the semileptonic decay channel are calculated via threepoint QCD sum rules. These form factors are used to estimate the decay width of the transition under consideration in both electron and muon channels. The obtained results can be used both in direct search for such decay channels at charm factories and in analysis of the Bc meson decay at LHC.
J. Y. Sungu, H. Sundu, and K. Azizi
Copyright © 2014 J. Y. Sungu et al. All rights reserved.

Reconstructions of EinsteinAether Gravity from Ordinary and EntropyCorrected Versions of Holographic and New Agegraphic Dark Energy Models
Sun, 12 Oct 2014 12:50:10 +0000
http://www.hindawi.com/journals/ahep/2014/475862/
Here we briefly discuss the EinsteinAether gravity theory by modification of EinsteinHilbert action. We find the modified Friedmann equations and then from the equations we find the effective density and pressure for EinsteinAether gravity sector. These can be treated as if dark energy provided some restrictions on the free function , where is proportional to . Assuming two types of the power law solutions of the scale factor, we have reconstructed the unknown function from HDE and NADE and their entropycorrected versions (ECHDE and ECNADE). We also obtain the EoS parameter for EinsteinAether gravity dark energy. For HDE and NADE, we have shown that the type I scale factor generates the quintessence scenario only and type II scale factor generates phantom scenario. But for ECHDE and ECNADE, both types of scale factors can accommodate the transition from quintessence to phantom stages; that is, phantom crossing is possible for entropycorrected terms of HDE and NADE models. Finally, we show that the models are classically unstable.
Ujjal Debnath
Copyright © 2014 Ujjal Debnath. All rights reserved.

Regge Poles in Neutron Scattering by a Cylinder
Tue, 16 Sep 2014 09:23:35 +0000
http://www.hindawi.com/journals/ahep/2014/124592/
We establish asymptotic expressions for the positions of Regge poles for cold neutron scattering on mesoscopic cylinder mirror as well as for the matrix residuals. We outline the correspondence between Regge poles and nearsurface quasistationary neutron states. Such states are of practical importance for studying subtle effects of neutronsurface interaction.
K. V. Protasov and A. Y. Voronin
Copyright © 2014 K. V. Protasov and A. Y. Voronin. All rights reserved.

FRW Cosmology with the Extended Chaplygin Gas
Mon, 15 Sep 2014 08:47:22 +0000
http://www.hindawi.com/journals/ahep/2014/231452/
We propose extended Chaplygin gas equation of state for which it recovers barotropic fluid with quadratic equation of state. We use numerical method to investigate the behavior of some cosmological parameters such as scale factor, Hubble expansion parameter, energy density, and deceleration parameter. We also discuss the resulting effective equation of state parameter. Using density perturbations we investigate the stability of the theory.
B. Pourhassan and E. O. Kahya
Copyright © 2014 B. Pourhassan and E. O. Kahya. All rights reserved.

A Field Theory with Curvature and Anticurvature
Sun, 14 Sep 2014 08:05:35 +0000
http://www.hindawi.com/journals/ahep/2014/687103/
The present work is an attempt to construct a unified field theory in a space with curvature and anticurvature, the PAPspace. The theory is derived from an action principle and a Lagrangian density using a symmetric linear parameterized connection. Three different methods are used to explore physical contents of the theory obtained. Poisson’s equations for both material and charge distributions are obtained, as special cases, from the field equations of the theory. The theory is a pure geometric one in the sense that material distribution, charge distribution, gravitational and electromagnetic potentials, and other physical quantities are defined in terms of pure geometric objects of the structure used. In the case of pure gravity in free space, the spherical symmetric solution of the field equations gives the Schwarzschild exterior field. The weak equivalence principle is respected only in the case of pure gravity in free space; otherwise it is violated.
M. I. Wanas and Mona M. Kamal
Copyright © 2014 M. I. Wanas and Mona M. Kamal. All rights reserved.

Study of Baryon Spectroscopy Using a New Potential Form
Wed, 10 Sep 2014 13:18:01 +0000
http://www.hindawi.com/journals/ahep/2014/196484/
In the present work, the nonrelativistic quark model is applied to study baryon systems, where the constituent quarks are bound by a suitable hyper central potential. We proposed a new phenomenological form of the interaction potential, digammatype potential. Using the Jacobi coordinates, the threebody wave equation is solved numerically to calculate the resonance states of the , and baryon systems. The present model contains only two adjustable parameters in addition to the quark masses. Our theoretical calculations are compared to the available experimental data and Cornell potential results. The description of the spectrum shows that the ground states of the considered light and strange baryon spectra are in general well reproduced.
L. I. AbouSalem
Copyright © 2014 L. I. AbouSalem. All rights reserved.

Method of Studying Decays with One Missing Particle
Wed, 10 Sep 2014 09:36:03 +0000
http://www.hindawi.com/journals/ahep/2014/931257/
A new technique is discussed that can be applied to baryon decays where decays with one missing particle can be discerned from background and their branching fractions determined, along with other properties of the decays. Applications include measurements of the CKM elements and and detection of any exotic objects coupling to decays, such as the inflaton. Potential use of and to investigate decays is also commented upon.
Sheldon Stone and Liming Zhang
Copyright © 2014 Sheldon Stone and Liming Zhang. All rights reserved.

Precision Measurement of the PositionSpace Wave Functions of Gravitationally Bound Ultracold Neutrons
Wed, 10 Sep 2014 07:20:56 +0000
http://www.hindawi.com/journals/ahep/2014/859241/
Gravity is the most familiar force at our natural length scale. However, it is still exotic from the view point of particle physics. The first experimental study of quantum effects under gravity was performed using a cold neutron beam in 1975. Following this, an investigation of gravitationally bound quantum states using ultracold neutrons was started in 2002. This quantum bound system is now well understood, and one can use it as a tunable tool to probe gravity. In this paper, we review a recent measurement of positionspace wave functions of such gravitationally bound states and discuss issues related to this analysis, such as neutron loss models in a thin neutron guide, the formulation of phase space quantum mechanics, and UCN position sensitive detectors. The quantum modulation of neutron bound states measured in this experiment shows good agreement with the prediction from quantum mechanics.
Y. Kamiya, G. Ichikawa, and S. Komamiya
Copyright © 2014 Y. Kamiya et al. All rights reserved.

Schwarzschildde Sitter and Antide Sitter ThinShell Wormholes and Their Stability
Tue, 09 Sep 2014 12:17:18 +0000
http://www.hindawi.com/journals/ahep/2014/639759/
This paper is devoted to construct Schwarzschildde Sitter and antide Sitter thinshell wormholes by employing Visser’s cut and paste technique. The DarmoisIsrael formalism is adopted to formulate the surface stresses of the shell. We analyze null and weak energy conditions as well as attractive and repulsive characteristics of thinshell wormholes. We also explore stable and unstable solutions against linear perturbations by taking two different Chaplygin gas models for exotic matter. It is concluded that the stressenergy tensor components
violate the null and weak energy conditions indicating the existence of
exotic matter at the wormhole throat. Finally, we find unstable and
stable configurations for the constructed thinshell wormholes.
M. Sharif and Saadia Mumtaz
Copyright © 2014 M. Sharif and Saadia Mumtaz. All rights reserved.