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Measurement of the production cross section ratio σ(χb2(1P))/σ(χb1(1P)) in pp collisions at s=8TeV
, Article Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics ; Volume 743 , April , 2015 , Pages 383-402 ; 03702693 (ISSN) ; Sirunyan, A. M ; Tumasyan, A ; Adam, W ; Bergauer, T ; Dragicevic, M ; Erö, J ; Fabjan, C ; Friedl, M ; Frühwirth, R ; Ghete, V. M ; Hartl, C ; Hörmann, N ; Hrubec, J ; Jeitler, M ; Kiesenhofer, W ; Knünz, V ; Krammer, M ; Krätschmer, I ; Liko, D ; Mikulec, I ; Rabady, D ; Rahbaran, B ; Rohringer, H ; Schöfbeck, R ; Strauss, J ; Taurok, A ; Treberer Treberspurg, W ; Waltenberger, W ; Wulz, C. E ; Mossolov, V ; Shumeiko, N ; Suarez Gonzalez, J ; Alderweireldt, S ; Bansal, M ; Bansal, S ; Cornelis, T ; De Wolf, E. A ; Janssen, X ; Knutsson, A ; Luyckx, S ; Ochesanu, S ; Roland, B ; Rougny, R ; Van De Klundert, M ; Van Haevermaet, H ; Van Mechelen, P ; Van Remortel, N ; Van Spilbeeck, A ; Blekman, F ; Blyweert, S ; D'Hondt, J ; Daci, N ; Heracleous, N ; Keaveney, J ; Lowette, S ; Maes, M ; Olbrechts, A ; Python, Q ; Strom, D ; Tavernier, S ; Van Doninck, W ; Van Mulders, P ; Van Onsem, G. P ; Villella, I ; Caillol, C ; Clerbaux, B ; De Lentdecker, G ; Dobur, D ; Favart, L ; Gay, A. P. R ; Grebenyuk, A ; Léonard, A ; Mohammadi, A ; Perniè, L ; Reis, T ; Seva, T ; Thomas, L ; Vander Velde, C ; Vanlaer, P ; Wang, J ; Adler, V ; Beernaert, K ; Benucci, L ; Cimmino, A ; Costantini, S ; Crucy, S ; Dildick, S ; Fagot, A ; Garcia, G ; Mccartin, J ; Ocampo Rios, A. A ; Ryckbosch, D ; Salva Diblen, S ; Sigamani, M ; Strobbe, N ; Thyssen, F ; Tytgat, M ; Yazgan, E ; Zaganidis, N ; Basegmez, S ; Beluffi, C ; Bruno, G ; Castello, R ; Caudron, A ; Ceard, L ; Da Silveira, G. G ; Delaere, C ; du Pree, T ; Favart, D ; Forthomme, L ; Giammanco, A ; Hollar, J ; Jez, P ; Komm, M ; Lemaitre, V ; Nuttens, C ; Pagano, D ; Perrini, L ; Pin, A ; Piotrzkowski, K ; Popov, A ; Quertenmont, L ; Selvaggi, M ; Vidal Marono, M ; Vizan Garcia, J. M ; Beliy, N ; Caebergs, T ; Daubie, E ; Hammad, G. H ; Aldá Júnior, W. L ; Alves, G. A ; Brito, L ; Correa Martins Junior, M ; Dos Reis Martins, T ; Mora Herrera, C ; Pol, M. E ; Carvalho, W ; Chinellato, J ; Custódio, A ; Da Costa, E. M ; De Jesus Damiao, D ; De Oliveira Martins, C ; Fonseca De Souza, S ; Malbouisson, H ; Matos Figueiredo, D ; Mundim, L ; Nogima, H ; Prado Da Silva, W. L ; Santaolalla, J ; Santoro, A ; Sznajder, A ; Tonelli Manganote, E. J ; Vilela Pereira, A ; Bernardes, C. A ; Dogra, S ; Fernandez Perez Tomei, T. R ; Gregores, E. M ; Mercadante, P. G ; Novaes, S. F ; Padula, S. S ; Aleksandrov, A ; Genchev, V ; Iaydjiev, P ; Marinov, A ; Piperov, S ; Rodozov, M ; Stoykova, S ; Sultanov, G ; Tcholakov, V ; Vutova, M ; Dimitrov, A ; Glushkov, I ; Hadjiiska, R ; Kozhuharov, V ; Litov, L ; Pavlov, B ; Petkov, P ; Bian, J. G ; Chen, G. M ; Chen, H. S ; Chen, M ; Du, R ; Jiang, C. H ; Liang, S ; Plestina, R ; Tao, J ; Wang, X ; Wang, Z ; Asawatangtrakuldee, C ; Ban, Y ; Guo, Y ; Li, Q ; Li, W ; Liu, S ; Mao, Y ; Qian, S. J ; Wang, D ; Zhang, L ; Zou, W ; Avila, C ; Chaparro Sierra, L. F ; Florez, C ; Gomez, J. P ; Gomez Moreno, B ; Sanabria, J. C ; Godinovic, N ; Lelas, D ; Polic, D ; Puljak, I ; Antunovic, Z ; Kovac, M ; Brigljevic, V ; Kadija, K ; Luetic, J ; Mekterovic, D ; Sudic, L ; Attikis, A ; Mavromanolakis, G ; Mousa, J ; Nicolaou, C ; Ptochos, F ; Razis, P. A ; Bodlak, M ; Finger, M ; Finger, M ; Assran, Y ; Ellithi Kamel, A ; Mahmoud, M. A ; Radi, A ; Kadastik, M ; Murumaa, M ; Raidal, M ; Tiko, A ; Eerola, P ; Fedi, G ; Voutilainen, M ; Härkönen, J ; Karimäki, V ; Kinnunen, R ; Kortelainen, M. J ; Lampén, T ; Lassila Perini, K ; Lehti, S ; Lindén, T ; Luukka, P ; Mäenpää, T ; Peltola, T ; Tuominen, E ; Tuominiemi, J ; Tuovinen, E ; Wendland, L ; Tuuva, T ; Besancon, M ; Couderc, F ; Dejardin, M ; Denegri, D ; Fabbro, B ; Faure, J. L ; Favaro, C ; Ferri, F ; Ganjour, S ; Givernaud, A ; Gras, P ; Hamel de Monchenault, G ; Jarry, P ; Locci, E ; Malcles, J ; Rander, J ; Rosowsky, A ; Titov, M ; Baffioni, S ; Beaudette, F ; Busson, P ; Charlot, C ; Dahms, T ; Dalchenko, M ; Dobrzynski, L ; Filipovic, N ; Florent, A ; Granier de Cassagnac, R ; Mastrolorenzo, L ; Miné, P ; Mironov, C ; Naranjo, I. N ; Nguyen, M ; Ochando, C ; Paganini, P ; Regnard, S ; Salerno, R ; Sauvan, J.B ; Sirois, Y ; Veelken, C ; Yilmaz, Y ; Zabi, A ; Agram, J. L ; Andrea, J ; Aubin, A ; Bloch, D ; Brom, J. M ; Chabert, E. C ; Collard, C ; Conte, E ; Fontaine, J. C ; Gelé, D ; Goerlach, U ; Goetzmann, C ; Le Bihan, A. C ; Van Hove, P ; Gadrat, S ; Beauceron, S ; Beaupere, N ; Boudoul, G ; Bouvier, E ; Brochet, S ; Carrillo Montoya, C. A ; Chasserat, J ; Chierici, R ; Contardo, D ; Depasse, P ; El Mamouni, H ; Fan, J ; Fay, J ; Gascon, S ; Gouzevitch, M ; Ille, B ; Kurca, T ; Lethuillier, M ; Mirabito, L ; Perries, S ; Ruiz Alvarez, J. D ; Sabes, D ; Sgandurra, L ; Sordini, V ; Vander Donckt, M ; Verdier, P ; Viret, S ; Xiao, H ; Tsamalaidze, Z ; Autermann, C ; Beranek, S ; Bontenackels, M ; Edelhoff, M ; Feld, L ; Hindrichs, O ; Klein, K ; Ostapchuk, A ; Perieanu, A ; Raupach, F ; Sammet, J ; Schael, S ; Weber, H ; Wittmer, B ; Zhukov, V ; Ata, M ; Dietz Laursonn, E ; Duchardt, D ; Erdmann, M ; Fischer, R ; Güth, A ; Hebbeker, T ; Heidemann, C ; Hoepfner, K ; Klingebiel, D ; Knutzen, S ; Kreuzer, P ; Merschmeyer, M ; Meyer, A ; Millet, P ; Olschewski, M ; Padeken, K ; Papacz, P ; Reithler, H ; Schmitz, S.A ; Sonnenschein, L ; Teyssier, D ; Thüer, S ; Weber, M ; Cherepanov, V ; Erdogan, Y ; Flügge, G ; Geenen, H ; Geisler, M ; Haj Ahmad, W ; Heister, A ; Hoehle, F ; Kargoll, B ; Kress, T ; Kuessel, Y ; Lingemann, J ; Nowack, A ; Nugent, I. M ; Perchalla, L ; Pooth, O ; Stahl, A ; Asin, I ; Bartosik, N ; Behr, J ; Behrenhoff, W ; Behrens, U ; Sharif University of Technology
Elsevier
2015
Abstract
A measurement of the production cross section ratio σ(χb2(1P))/σ(χb1(1P)) is presented. The χb1(1P) and χb2(1P) bottomonium states, promptly produced in pp collisions at s=8TeV, are detected by the CMS experiment at the CERN LHC through their radiative decays χb1,2(1P)→ϒ(1S)+γ. The emitted photons are measured through their conversion to e+e- pairs, whose reconstruction allows the two states to be resolved. The ϒ(1S) is measured through its decay to two muons. An event sample corresponding to an integrated luminosity of 20.7fb-1 is used to measure the cross section ratio in a phase-space region defined by the photon pseudorapidity, |ηγ|<1.0; the ϒ(1S) rapidity, |yϒ|<1.5; and the ϒ(1S)...
Stable local moments of vacancies, substitutional and hollow site impurities in graphene
, Article Journal of Physics Condensed Matter ; Volume 27, Issue 15 , 2015 ; 09538984 (ISSN) ; Jafari, S. A ; Sharif University of Technology
Institute of Physics Publishing
2015
Abstract
The two-sublattice nature of graphene lattice in conjunction with three-fold rotational symmetry, allows for the p-wave hybridization of the impurity state with the Bloch states of carbon atoms. Such an opportunity is not available in normal metals where the wave function is scalar. The p-wave hybridization function V (-k) appears when dealing with vacancies, substitutional adatoms and the hollow site impurities while the s-wave mixing on graphene lattice pertains only to the top site impurities. In this work, we compare the local moment formation in these two cases and find that the local moments formed by p-wave mixing compared to the s-wave one are robust against the changes in the...
Detection of characteristic points of ecg using quadratic spline wavelet transfrom
, Article 3rd International Conference on Signals, Circuits and Systems, SCS 2009, 6 November 2009 through 8 November 2009, Medenine ; 2009 ; 9781424443987 (ISBN) ; Vahdat, B. V ; Mousavi, S. R ; Sharif University of Technology
Abstract
This paper presents a method for ECG characteristic points detection based on Wavelet Transform (WT). Wavelet Transform leads to more accurate results in analyzing nonstationary signals such as ECG. The selected wavelet is quadratic spline wavelet. Using quadratic spline mother wavelet, a method for detection of QRS complex and T and P waves is presented and evaluated with the help of MIT-BIH Arrhythmia database. Experimental results show excellent performance of the proposed method. © 2009 IEEE
Resilience of Majorana Fermions in 2XY Chain in the Presence of Disorder
, Ph.D. Dissertation Sharif University of Technology ; Rouhani, Shahin (Supervisor) ; Jafari, Akbar (Co-Supervisor)
Abstract
In this thesis, we investigate the effect of disorder on Majorana fermions at the boundary of one-dimensional topological superconductor. Starting from one-dimensional spin model nXY and then applying the Jordan-Wigner transformation result in one-dimensional topological superconductor. The Majorana fermions are found in the topological superconductor boundaries, protected by particle-hole and time-reversal symmetries. On the other hand, these fermions are highly localized at the boundary. Owing to non-trivial topology, the Majorana fermions are not affected by weak disorder. Increasing the disorder strength, the localization length of the Majorana fermions increases. Upon further increase in...
P-Wave Holographic Superconductor Phase Transition
, Ph.D. Dissertation Sharif University of Technology ; Arfaei, Hessamaddin (Supervisor) ; Alishahiha, Mohsen (Supervisor)
Abstract
In the present thesis, two subjects have been studied. In the first one we introduce the theory of holographic superconductors. Using the gauge/gravity correspondence, many of the features of perconductors will be explored. Analyzing the five-dimensional AdS gravity coupled to a gauge field and a charged scalar field, we can recognize the system undergoes a superconductor/insulator transition at zero temperature and critical chemical potential.We consider the backreaction effects to construct the complete phase diagram for the system. For a determined chemical potential there are typically two phase transitions as the temperature is lowered.we also discuss the zero temperature limit of a...
The scattering of P-waves by a piezoelectric particle with FGPM interfacial layers in a polymer matrix
, Article International Journal of Solids and Structures ; Volume 47, Issue 18-19 , 2010 , Pages 2390-2397 ; 00207683 (ISSN) ; Shodja, H. M ; Sharif University of Technology
2010
Abstract
Propagation of P-wave in an unbounded elastic polymer medium which contains a set of nested concentric spherical piezoelectric inhomogeneities is formulated. The polymer matrix is made of Epoxy and is isotropic; each phase of the inhomogeneity is made of a different piezoelectric material and is radially polarized and has spherical isotropy. Note that the individual phases are homogeneous, and all interfaces are perfectly bonded. The scattered displacement and electric potentials in the matrix are expressed in terms of spherical wave vector functions and Legendre functions, respectively. The transmitted displacement and electric potentials within each phase of the piezoelectric particle are...
Effects of dynamical noises on Majorana bound states
, Article Physical Review B ; Volume 102, Issue 16 , 2020 ; Kargarian, M ; Sharif University of Technology
American Physical Society
2020
Abstract
The nonlocal nature of unpaired Majorana bound states (MBSs) in topological superconductors can be exploited to create topologically protected qubits and perform gate operations fault-tolerantly via braidings. However, the time-dependent noises induced by coupling to an environment which is inevitable in any realistic system could spoil the topological protection. In this work, we study the effects of various dynamical noises such as Lorentzian, thermal, and quantum point contact on the MBSs in the recently proposed one-dimensional topological superconductors. We begin by investigating the Kitaev p-wave superconductors and examine the effects of long-range hopping and pairing on the...
The scattering of electro-elastic waves by a spherical piezoelectric particle in a polymer matrix
, Article International Journal of Engineering Science ; Volume 44, Issue 10 , 2006 , Pages 633-649 ; 00207225 (ISSN) ; Shodja, H. M ; Sharif University of Technology
2006
Abstract
This paper is devoted to the study of scattering of plane harmonic waves by a piezoelectric sphere with spherical isotropy embedded in an unbounded isotropic polymer matrix. The scattered displacement field and the electric potential in the matrix are expressed in terms of spherical vector wave functions and spherical harmonic functions, respectively. For the field points inside the inhomogeneity, new displacement functions are introduced. Expansion of the new displacement functions and the electric potential in terms of spherical harmonic functions, the equations of motion and electrostatic lead to four second order ordinary differential equations (odes), where three of them are coupled....
ECG fiducial point extraction using switching Kalman filter
, Article Computer Methods and Programs in Biomedicine ; Volume 157 , 2018 , Pages 129-136 ; 01692607 (ISSN) ; Montazeri Ghahjaverestan, N ; Shamsollahi, M. B ; Jutten, C ; Sharif University of Technology
Elsevier Ireland Ltd
2018
Abstract
In this paper, we propose a novel method for extracting fiducial points (FPs) of the beats in electrocardiogram (ECG) signals using switching Kalman filter (SKF). In this method, according to McSharry's model, ECG waveforms (P-wave, QRS complex and T-wave) are modeled with Gaussian functions and ECG baselines are modeled with first order auto regressive models. In the proposed method, a discrete state variable called “switch” is considered that affects only the observation equations. We denote a mode as a specific observation equation and switch changes between 7 modes and corresponds to different segments of an ECG beat. At each time instant, the probability of each mode is calculated and...