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Model dependent analysis of ■→■ decays in beyond standard model

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Chinese physics C 2024年第9期48卷 86-99页

作者： S.Mahata M.Mandal H.mahapatra S.Biswas S.Sahoo department of physics National Institute of Technology Durgapur

Motivated by the recent experimental results of branching fractions for ■→■ decays,which deviate from their SM predictions,we hve investigated these decays in W' model and scalar leptoquark model to determine potential signatures of new physics(Np) in semileptonic charm decays induced by c→■ *** recent experimental results of branching fractions for semileptonic d meson decays,new coupling parameters are predicted for the aforementioned Np *** fraction,forward-backward asymmetry,and lepton polarization asymmetry are examined by considering the predicted Np coupling *** results of branching fractions in scalar leptoquark model are found very close to the experimental results and exist around the range of 1σ *** presented a comparative study of the Np models to check their sensitivity on these *** anticipate that further research on these decays will significantly support our findings.

关键词： $ W' $ boson charm decay flavour changing charged current new physics scalar leptoquark

Model dependent analysis of d^(+)_(s)→η^(′)l+v_(l) decays in beyond standard model

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Chinese physics C 2024年第9期48卷 82-95页

作者： S.Mahata M.Mandal H.mahapatra S.Biswas S.Sahoo department of physics National Institute of Technology Durgapur Durgapur 713209West BengalIndia

Motivated by the recent experimental results of branching fractions for d^(+)_(s)→η^(′)l+v_(l) decays,which deviate from their SM predictions,we hve investigated these decays in W' model and scalar leptoquark model to determine potential signatures of new physics(Np) in semileptonic charm decays induced by c→(s,d)l+v_(l) *** recent experimental results of branching fractions for semileptonic d meson decays,new coupling parameters are predicted for the aforementioned Np *** fraction,forward-backward asymmetry,and lepton polarization asymmetry are examined by considering the predicted Np coupling *** results of branching fractions in scalar leptoquark model are found very close to the experimental results and exist around the range of 1σ *** presented a comparative study of the Np models to check their sensitivity on these *** anticipate that further research on these decays will significantly support our findings.

关键词： charm decay new physics W′boson scalar leptoquark flavour changing charged current

Measurements of dihadron correlations relative to the event plane in Au+Au collisions at√^(S)NN=200 GeV

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Chinese physics C 2021年第4期45卷 198-241页

作者： H.Agakishiev M.M.Aggarwal Z.Ahammed A.V.Alakhverdyants I.Alekseev J.Alford B.d.Anderson C.d.Anson d.Arkhipkin G.S.Averichev J.Balewski d.R.Beavis N.K.Behera R.Bellwied M.J.Betancourt R.R.Betts A.Bhasin A.K.Bhat H.Bichsel J.Bieleik J.Bielcikova B.Biritz L.C.Bland W.Borowski J.Bouchet E.Braidot A.V.Brandin A.Bridgeman S.G.Brovko E.Bruna S.Bueltmann I.Bunzarov T.p.Burton X.Z.Cai H.Caines M.Calderon de la Barca Sanchez d.Cebra R.Cendejas M.C.Cervantes Z.Chajecki p.Chaloupka S.Chattopadhyay H.F.Chen J.H.Chen J.Y.Chen L.Chen J.Cheng M.Cherney A.Chikanian K.E.Choi W.Christie p.Chung M.J.M.Codrington R.Corliss J.G.Cramer H.J.Crawford S.dash A.davila Leyva L.C.de Silvat R.R.debbe T.G.dedovich A.A.derevschikov R.derradi de Souza L.didenko p.djawotho S.M.dogra X.dong J.L.drachenberg J.E.draper J.C.dunlop L.G Efimov M.Elnim J.Engelage G Eppley M.Estienne L.Eun O.Evdokimov R.Fatemi J.Fedorisin A.Feng R.G.Fersch p.Filip E.Finch V.Fine Y.Fisyak C.A.Gagliardi d.R.Gangadharan A.Geromitsos F.Geurts p.Ghosh Y.N.Gorbunov A.Gordon O.Grebenyuk d.Grosnick S.M.Guertin A.Gupta W.Guryn B.Haag O.Hajkova A.Hamed L-X.Han J.W.Harris J.p.Hays-Wehle M.Heinz S.Heppelmann A.Hirsch E.Hjort G.W.Hoffmann d.J.Hofiman B.Huang H.Z.Huang T.J.Humanic L.Huo G.Igo p.Jacobs W.W.Jacobs C.Jena F.Jin J.Joseph E.G.Judd S.Kabana K.Kang J.Kapitan K.Kauder H.Ke d.Keane A.Kechechyan d.Kettler d.p.Kikola J.Kiryluk A.Kisiel V.Kizka A.G.Knospe d.d.Koetke T.Kollegger J.Konzer I.Koralt L.Koroleva W.Korsch L.Kotchenda V.Kouchpil p.Kravtsov K.Krueger M.Krus L.Kumar p.Kurnadi M.A.C.Lamont J.M.Landgraf S.Lapointe J.Lauret A.Lebedev R.Lednicky J.H.Lee W.Leight M.J.LeVine C.Lil L.Li N.Li W.Li X.Li X.Li Y.Li Z.M.Li M.A.Lisa F.Liu H.Liu J.Liu T.Ljubicic W.J.Llope R.S.Longacre W.A.Love Y.Lu E.V.Lukashov X.Luo G.L.Ma Y.G.Mai d.p.mahapatra R.Majka O.I.Mall L.K.Mangotra R.Manweiler S.Margetis C.Markert H.Masui H.S.Matis Yu.A.Matulenko d.Medonald T.S.McShane A.Meschanin R.Milner N.G.Minaev S.Mioduszewski A.Mischke M.K.Mitrovski B.Mohanty M.M.Mondal B.Morozov d.A.Morozov M.G.Munhoz M Argonne National Laboratory Argonnellinois 60439USA Brookhaven National Laboratory UptonNew York 11973USA University of Califomia BerkeleyCaliformnia 94720USA University of California DavisCalifornia 95616USA University of Califormnia Los AngelesCalifomia 90095USA Universidade Estadual de Campinas Sao PauloBrazil University of Illinois at Chicago ChicagoIlinois 60607USA Creighton University OmahaNebraska 68178USA Czech Technical University in prague FNSPEPrague11519Czech Republic Nuclear physics Institute AS CR 25068 Rez/PragueCzech Republic University of Frankfurt FrankfurtGermany Institute of physics Bhubaneswar 751005India Indian Institute of Technology MumbaiIndia Indiana University BloomingtonIndiana 47408USA Alikhanov Instiute for Theoretical and Experimental physics MoscowRussia University of Jammu Jammu 180001India Joint Institute for Nuclear Research Dubna141980Russia Kent State University KentOhio 44242USA University of Kentucky LexingtonKentucky40506-0055USA Institute of Modern physics LanzhouChina Lawrence Berkeley National Laboratory BerkeleyCalifornia 94720USA Massachusetts Institute of Technology CambridgeMA 02139-4307USA Mx-planck-Institut fir physik MunichGermany Michigan State University East LansingMichigan 48824USA Moscow Engineering physics Institute Moscow Russia NIKHEF and Utrecht University AmsterdamThe Netherlands Ohio State University ColumbusOhio 43210USA Old dominion University NorfolkVA23529USA panjab University Chandigarh 160014India pennsyIvania State University University ParkPennsylvania 16802USA Institute of High Energy physics ProtvinoRussia purdue University West LafayetteIndiana 47907USA pusan National University PusanRepublic of Korea University of Rajasthan Jaipur 302004India Rice University HoustonTexas 77251USA Universidade de Sao paulo Sao PauloBrazil University of Science&Technology of China Hefei 230026.China Shandong University JinanShandong 250100China Shanghai Institute of Applied physics Shanghai 201800Chi

dihadron azimuthal correlations containing a high transverse momentum(pr)trigger particle are sensit-ive to the properties of the nuclear medium created at RHIC through the strong interactions occurring between the traversing parton and the medium,*** measurements revealed a strong modification to di-hadron azimuthal correlations in Au+Au collisions with respect to ptp and d+Au *** modification in-creases with the collision centrality,suggesting a path-length or energy density dependence to the je-quenching *** paper reports STAR measurements of dihadron azimuthal correlations in mid-central(20%-60%)Au+Au collisions at√^(S)NN=200 GeV as a function of the trigger particle's azimuthal angle relative to the event plane,Ф_(s)=|Ф_(t)-ψ_(Ep)|.The azimuthal correlation is studied as a function of both the trigger and associated particle *** subtractions of the combinatorial background and anisotropic flow,assuming Zero Yield At Minimum(ZYAM),are *** correlation results are first discussed with subtraction of the even harmonic(elliptic and quadrangu-lar)flow *** away-side correlation is strongly modifed,and the modification varies withФ_(s),with a double-peak structure for out-of-plane trigger *** near-side ridge(long range pseudo-rapidity△_(η)correla-tion)appears to drop with increasingФ_(s)while the jet-like component remains approximately *** correla-tion functions are further studied with the subtraction of odd harmonic triangular flow background arising from *** is found that the triangular flow,while responsible for the majority of the amplitudes,is not sufficient to explain theφs-dependence of the ridge or the away-side double-peak *** dropping ridge withФ_(s)could be attributed to aФ_(s)-dependent lliptie anisotropy;however,the physics mechanism of the ridge remains an open *** with aФ_(s)-dependent elliptic flow,the away-side correlation structure

关键词： relativistic heavy ion collisions dihadron correlations jet-medium interactions anisotropic flow background event plane

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parameter uncertainty in biomathematical model described by one-prey two-predator system with mutualism

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International Journal of Biomathematics 2017年第6期10卷 147-182页

作者： d. pal G. S. mahapatra G. p. Samanta Chandrahati dilip Kumar High School (HS) Chandrahati 712504 West Bengal India department of Mathematics National Institute of Technology-puducherry Karaikal 609605 India department of Mathematics Indian Institute of Engineering Science and Technology Shibpur Howrah 711103 India

In this paper, a three-species system consisting of two predators which are in mutual- ism with each other and preying on the same single prey is considered. Also, the prey and first predator are harvested under optimal conditions. The values of the biological parameters depend on the collection of data from the experts as well as on the nature of the environment in which prey predator system are considered. So the biological para- meters are not precise in reality. This paper presents a different approach to study the prey-predator model with imprecise biological parameters. All the possible equilibrium points are identified and the local as well as global stability criteria under imprecise- ness are discussed. The possibility of existence of bionomic equilibrium is discussed. The optimal harvesting policy is studied using pontryagin＇s maximum principle. Numerical examples are provided to support the proposed approach.

关键词： Mutualism equilibrium stability bioeconomic optimal control intervalnumber.

Surface-engineered gadolinium oxide nanorods and nanocuboids for bioimaging

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Rare Metals 2021年第4期40卷 848-857页

作者： Nitya Ramesh Chawda Santosh Kumar mahapatra Indrani Banerjee School of Nano Sciences Central University of GujaratGandhinagar 382030India department of physical Sciences Central University of PunjabBathinda 151001India

Folic acid and d-gluconic acid-capped gadolinium oxide nanorods and nanocuboids were synthesized via co-precipitation *** study of relaxivity factor on the role of capping and morphology for enhancing contrast ability for T_(1) and T_(2) magnetic resonance imaging(MRI) was *** obtained r_(2)/r_(1) ratio for folic acid and d-gluconic acid-capped gadolinium oxide nanorods and nanocuboids was 1.5 and 1.3,*** nanocrystals were characterized and presented with properties such as good dispersity and stability required for standard contrast agent used in *** characterization and the analysis of capping agent for nanocrystals suggest the preferable use of carbohydrate moieties with higher number of hydroxyl functional group reacted with urea and hydrogen peroxide for desired morphology and anisotropic ***-differential thermal analysis(TG-dTA) illustrated the amount of capping,transition temperature from Gd(OH)3 to GdOOH and crystallization temperature from GdOOH to *** nanocrystals would be significant for other biomedical applications such as drug delivery when equipped with well-functionalized drug molecules.

关键词： Contrast agent Nanomaterials Magnetic resonance imaging Imaging

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Vibration analysis of multi-walled carbon nanotubes embedded in elastic medium

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Frontiers of Structural and Civil Engineering 2014年第2期8卷 151-159页

作者： pattabhi R. BUdARApU Sudhir Sastry YB Brahmanandam JAVVAJI d. Roy mahapatra Institute of Structural Mechanics Bauhaus University of Weimar Weimar 99423 Germany deptarment of Aeronautical Engineering Institute of Aeronautical Engineering Hyderabad 500043 India department of Aerospace Engineering Indian Institute of Science Bangalore 560012 India

We propose a method to estimate the natural frequencies of the multi-walled carbon nanotubes （MWCNTs） embedded in an elastic medium. Each of the nested tubes is treated as an individual bar interacting with the adjacent nanotubes through the inter-tube Van der Waals forces. The effect of the elastic medium is introduced through an elastic model. The mathematical model is finally reduced to an eigen value problem and the eigen value problem is solved to arrive at the inter-tube resonances of the MWCNTs. Variation of the natural frequencies with different parameters are studied. The estimated results from the present method are compared with the literature and results are observed to be in close agreement.

关键词： natural frequencies multi-walled carbon nanotubes (MWCNTS) elastic medium

dynamic parameters of vehicles under heterogeneous traffic stream with non-lane discipline:An experimental study

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Journal of Traffic and Transportation Engineering(English Edition) 2018年第5期5卷 386-405页

作者： Geetimukta mahapatra Akhilesh Kumar Maurya department of Civil Engineering Indian Institute of Technology Guwahati

On the heterogeneous and no lane disciplined traffic, the abreast maneuver of vehicles depends upon the driver behavior, vehicle type and most importantly the traffic parameters such as vehicle speed and acceleration. Hence, the drivers have two basic tasks while driving, first is to control the vehicle＇s position along longitudinal direction of motion and second is to control the vehicle＇s position along lateral direction i.e. the width of the roadway. The relation between the dynamic parameters （speed and lateral/longitudinal acceleration）, can very well represent the driving behavior of vehicles in mixed with weak or no lane disciplined traffic. Hence, the study of longitudinal and lateral control of vehicles in a comprehensive manner is necessary. In the present paper, driving behavior of vehicles are studied by analyzing longitudinal and lateral acceleration/deceleration （A/d） with operating speed of vehicles on different straight roadway sections. data are collected from five major cities of India using GpS based instrument （Video-VBOX） mounted on five different type of vehicles. The probability distribution of longitudinal A/d and the lateral acceleration are analysed, and their relationship with operating speed of vehicles are studied on roads with a different number of lanes for different vehicle types. A two-term exponential and linear relationship with operating speed are observed for lateral and longitudinal A/d respectively.

关键词： Non-lane discipline traffic Mixed traffic driving behavior dynamic parameters Operating speed g-g diagram

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performance analysis of a thick copper-electroplated FdM ABS plastic rapid tool EdM electrode

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Advances in Manufacturing 2018年第4期6卷 442-456页

作者： Saroj Kumar padhi S. S. mahapatra Rosalin padhi Harish Chandra das department of Mechanical Engineering Koneru Lakshmiah Education Foundation Deemed to be University Vaddeswarm 522502 India department of Mechanical Engineering National Institute of Technology Rourkela Rourkela 76900& India department of physics Berhampur University Berhampur 760007 India department of Mechanical Engineering National Institute of Technology Meghalaya Shillong 793003 India

The importance of rapid tooling (RT) and additive manufacturing (AM) appears to be indispensable for boosting the process of manufacturing and expanding the horizon of production technology worldwide. This concept draws the attention of numerous scholars to arrive at a conclusive theory for the widespread utilization of RT. This study attempts to determine the viability and performance of an RT electrode in the field of electro discharge machining (EdM). The electrode prototype is made using an acrylonitrile butadiene styrene (ABS) plastic by fused deposition modeling (FdM), an AM technique, electroplated with copper of desired thickness, and used in die sinking EdM of d2 steel. The scanning electron microscope analysis of the electroplated samples confirms that it is possible to obtain the desired thickness of the metal by electroplating on any electrically conductive surfaces. In the present work, an experimental study is performed for examining the electroplated copper thickness of the plastic EdM electrode and its performances. It is found that the electroplated ABS plastic EdM RT electrode successfully performs the machining operation of d2 steel, and the results are comparable with a solid electrode. The study reveals that the RT electrode can be regarded as a viable tool for rough cutting or semi-finishing cut EdM functions. The experimental results are thoroughly discussed, examined, analyzed, and evaluated for the purpose of developing the appropriate form of the concept.

关键词： Additive manufacturing (AM) Fused deposition modeling (FdM)-Metallization of acrylonitrile butadiene styrene (ABS) plastic Reduced silver colloidal Rapid tooling (RT) Electro discharge machining (EdM)

Morphological and functional alterations of female reproduction after regular exposure of bamboo shoots of North East India

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Asian pacific Journal of Reproduction 2017年第4期6卷 151-157页

作者： deotima Sarkar Arijit Chakraborty dakshayani mahapatra Amar K Chandra Endocrinology and Reproductive physiology Laboratory Department of PhysiologyUniversity of Calcutta92APC RoadKolkata-700009

Objective:To evaluate the effect of daily consumption of bamboo shoots (BS) on the morphological features and functional status of the female reproductive system in adult with respect to ***: Adult female rats were divided into control and experimental groups of six each. Control group was given normal diet while experimental group was fed BS by 1/3rd replacement of 180 g of their foodi.e.60 g of BS containing 35 g of goitrogens of cyanogenic origin such that each rat likely consumed 6 mg/100 g of body weight per day for a period of 45 d. Morphological features like changes in body weight and organ weight were noted. Key steroidogenic enzyme levels viz?53β hydroxysteroid dehydrogenase (HSd) and 17β HSd along with serum estradiol, estriol and progesterone levels were measured. Estrous cyclicity of the animals monitored regularly followed by histological analysis of thyroid, ovary and uterus at the end of ***:Increase in body weight, thyroid gland weight and thyroid stimulating hormone, decrease in serum triiodothyronine and thyroxine, a decrease in ovarian as well as uterine weight and the activity of steroidogenic enzymes?53β HSd andβ17β HSd along with diminished serum estradiol, estriol and progesterone levels were noted;while histological plates showed prominent degenerative changes in both the ovary and uterus. Estrous cyclicity of the treated animals were irregular and almost stopped at diestrous stage of the cycle in the latter stage of the treatment as compared to ***: Overall results indicates that BS rich in cyanogenic constituents induces biochemical hypothyroidism in the experimental animals that acts in corroboration to cause morphological and functional alteration of reproductive organs indicating its likely impact in fertility on continued use.

关键词： Bamboo shoots dietary goitrogens Female reproduction Estrogen Steroidogenic enzymes Reproductive disruptor