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Dissertations / Theses on the topic 'Baryonen'

Author: Grafiati
Published: 7 December 2024
Last updated: 31 July 2025

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1

Kiehlmann, H. D. [Verfasser]. "Vorhersage von Strukturfunktionen der Baryonen fuer die elektromagnetische und schwache Wechselwirkung / H. D. Kiehlmann." Karlsruhe : KIT-Bibliothek, 2010. http://d-nb.info/1188749358/34.

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2

Urlichs, Konrad. "Baryons and baryonic matter in four-fermion interaction models." [S.l.] : [s.n.], 2007. http://deposit.ddb.de/cgi-bin/dokserv?idn=983572755.

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3

Nicolini, Janina. "Study of rare beauty baryon decays with the LHCb detector." Electronic Thesis or Diss., université Paris-Saclay, 2024. http://www.theses.fr/2024UPASP049.

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Les courants neutres avec changement de saveur, tels que les transitions b-> sl+l-, sont interdits au premier ordre dans le Modèle Standard (MS) et ne peuvent se produire qu'au niveau des boucles. Par conséquent, ils sont sensibles à la présence potentielle de Nouvelle Physique (NP) qui se manifestait par la présence de petites déviations par rapport aux prédictions du MS. Alors que la matière ordinaire est composée de baryons, très peu de mesures ont été réalisées avec des transitions baryoniques b-> sl+l- en raison de la suppression de la production de baryons de beauté dans les expéri
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4

Ouared, Mohamed Rafik. "Étude des propriétés de production et de désintégration du baryon charme lambda C dans les interactions PP à 400 GeV/c." Paris 11, 1987. http://www.theses.fr/1987PA112191.

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5

Drach, Vincent. "Fermions twistés dynamiques et spectroscopie des baryons." Phd thesis, Grenoble, 2010. http://www.theses.fr/2010GRENY015.

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Ce travail s'intéresse au calcul de la masse des baryons à partir de la théorie décrivant l'interaction forte : la chromodynamique quantique (QCD). Cette théorie régit l'interaction entre les quarks et l es gluons et a pu durant ces dernières décennies être vérifiée à haute énergie grâce à l'une de ses propriétés : la liberté asymptoti que. Celle-ci prédit que les calculs perturbatifs sont valides à haute énergie car la constante de couplage tend vers zéro. Les quantités physiques régissant la physique à basse énergie nécessitent quant à elles un traitement non pertubatif et font l'objet de ce
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6

Drach, Vincent. "Fermions twistés dynamiques et spectroscopie des baryons." Phd thesis, Université de Grenoble, 2010. http://tel.archives-ouvertes.fr/tel-00633497.

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Ce travail s'intéresse au calcul de la masse des baryons à partir de la théorie décrivant l'interaction forte : la chromodynamique quantique (QCD). Cette théorie régit l'interaction entre les quarks et l es gluons et a pu durant ces dernières décennies être vérifiée à haute énergie grâce à l'une de ses propriétés : la liberté asymptoti que. Celle-ci prédit que les calculs perturbatifs sont valides à haute énergie car la constante de couplage tend vers zéro. Les quantités physiques régissant la physique à basse énergie nécessitent quant à elles un traitement non pertubatif et font l'objet de ce
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7

Haupt, Christian. "Electromagnetic properties of baryons." [S.l.] : [s.n.], 2006. http://deposit.ddb.de/cgi-bin/dokserv?idn=980373271.

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8

Chabanier, Solène. "Neutrinos and dark matter cosmology with the Lyman-α forest : the interplay between large-scale evolution and small-scale baryonic physics". Thesis, université Paris-Saclay, 2020. http://www.theses.fr/2020UPASP034.

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Bien que le modèle cosmologique standard LCDM offre un cadre remarquablement en accord avec de nombreuses observations indépendantes, beaucoup de mystères persistent. En particulier, la masse des neutrinos est toujours inconnue. De par leur masse non nulle, ils laissent une empreinte sur les grandes structures de l'univers à travers l'échelle à laquelle ils diffusent, qui se manifeste comme un déficit de fluctuations de densité de matière aux petites échelles. Par ailleurs, le modèle de matière noire froide montre des tensions persistantes avec les observations sur des échelles inférieures au
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9

Mancuso, Chiara. "Measurement of the CKM angle gamma with the Lambda⁰_b -> D⁰ p K⁻ decay and commissioning of the Upstream Tracker at the LHCb experiment." Electronic Thesis or Diss., université Paris-Saclay, 2024. http://www.theses.fr/2024UPASP084.

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La violation de la Parité de Charge (CP) est un phénomène bien documenté décrit par le Modèle Standard (MS) de la physique des particules. La compréhension de la violation de CP peut expliquer pourquoi la matière a prévalu sur l'antimatière après le Big Bang, ce qui explique essentiellement notre existence. De nombreuses prédictions théoriques ont été observées expérimentalement, à commencer par la découverte en 1964 de la violation de CP dans le système du kaon neutre par James Cronin et Val Fitch. Depuis lors, de nombreuses expériences de physique des saveurs ont enrichi nos connaissances, o
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10

Kerins, Eamonn John. "Baryonic dark matter and its detection." Thesis, Queen Mary, University of London, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.243974.

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11

Miyamoto, Takaya. "Charmed baryon interaction from lattice QCD and its application to charmed hypernuclei." Kyoto University, 2019. http://hdl.handle.net/2433/242606.

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12

Habibi, Farhang. "Searching for missing baryons through scintillation." Phd thesis, Université Paris Sud - Paris XI, 2011. http://tel.archives-ouvertes.fr/tel-00625486.

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Cool molecular hydrogen H2 may be the ultimate possible constituent to the Milky-Way missing baryon. We describe a new way to search for such transparent matter in the Galactic disc and halo, through the diffractive and refractive effects on the light of background stars. By simulating the phase delay induced by a turbulent medium, we computed the corresponding illumination pattern on the earth for an extended source and a given passband. We show that in favorable cases, the light of a background star can be subjected to stochastic fluctuations of the order of a few percent at a characteristic
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13

Avenarius, Christoph. "The spin structure of the baryons." Thesis, University of Oxford, 1992. http://ora.ox.ac.uk/objects/uuid:448e060b-085d-449f-b33a-dd3913093d6d.

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Baryons are considered in the Nonrelativistic Quark Model (NQM) to be bound states of three valence quarks. Each quark has two possible spin eigenstates in the restframe of the baryon whose spin is fully carried by quarks. The baryon wavefunctions are connected through SU(6) symmetry rotations. For a long time, the measured magnetic moments of the baryons appeared to be in agreement with the NQM predictions. However, recent experiments which are examining the spin structure of the baryons show the failure of several NQM predictions. The so-called 'spin crisis' arose from the interpretation of
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14

MERLI, ANDREA. "SEARCH FOR CP VIOLATION IN BARYONS." Doctoral thesis, Università degli Studi di Milano, 2019. http://hdl.handle.net/2434/656029.

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In the past, flavour physics has driven indirect discoveries of new particles through precision measurements of other processes before the actual particles could be produced directly. For example the discovery of the differences in the behaviour of matter and antimatter, CP violation (CPV), has led to the explanation of flavour mixing with three families of quarks; the absence of the decay{KL}{mumu} decay drove the prediction of the cquark quark trough the GIM mechanism; the measurement of the Bd mixing allowed for the prediction of high mass of the quark quark. The asymmetry between matter
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15

Niemiec, Anna. "Influence of the environment on galaxy formation." Thesis, Aix-Marseille, 2017. http://www.theses.fr/2017AIXM0260/document.

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Dans le modèle de formation hiérarchique des structures, les amas de galaxies se forment et grandissent par l'accrétion de groupes plus petits ou de galaxies isolées. Dans ce scenario, comprendre comment les galaxies accrétées interagissent avec cet environnement très dense est une étape importante pour comprendre le schéma global de l'évolution des galaxies et de la formation des structures. En effet, pendant leur chute au coeur de l'amas, les galaxies sont sujettes à diverses interactions avec l'amas hôte, au niveau de leur composante baryonique aussi bien que matière noire, et ces interacti
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16

Ren, Xiulei. "Effective Field Theory for Baryon Masses." Thesis, Université Paris-Saclay (ComUE), 2015. http://www.theses.fr/2015SACLS156/document.

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La masse est une des propriétés les plus fondamentales de la matière. Comprendre son origine a longtemps été un sujet central en physique. D'après la physique nucléaire et la physique des particules modernes, la clef de ce problème réside dans la compréhension de l’origine de la masse du nucléon à partir de l’interaction forte. Avec le développement des technologies informatiques, la chromodynamique quantique sur réseau offre la possibilité de comprendre l’origine de la masse à partir des premiers principes. Cependant, dû aux ressources de calcul limitées, les masses obtenues à partir des calc
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17

Cumberbatch, Daniel T. "The indirect detection of non-Baryonic Dark Matter." Thesis, University of Oxford, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.489426.

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The understanding of the nature of the dominant forms of matter and energy in the Universe is undoubtedly one of the most intriguing concepts within the vast domain of current scientific research. Current experimental evidence supports the notion that the dominant form of matter in the Universe is composed of a non-luminous, possibly exotic, material that is distinct from the familiar baryonic matter from which the luminous Universe is composed.
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18

Zanotti, James Michael. "Baryon spectroscopy with FLIC fermions." Title page, abstract and table of contents only, 2002. http://web4.library.adelaide.edu.au/theses/09PH/09phz33.pdf.

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"October 2002" Bibliography: p. 129-136. 1. Introduction -- 2. QCD and the standard model -- 3. The Lattice -- 4. Symanzik improvement in the Static Quark Potential -- 5. Scale determination for an improved Gluon Action -- 6. Fat-link Irrelevant Clover Fermion actions -- 7. Excited Baryons in Lattice QCD -- 8. Spin 3/2 Baryons -- 9. Conclusion. This thesis reports work done in conducting numerical simulations of Lattice QCD.
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19

Knippschild, Bastian [Verfasser]. "Baryons in the chiral regime / Bastian Knippschild." Mainz : Universitätsbibliothek Mainz, 2012. http://d-nb.info/1020765712/34.

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20

Yamato, Shinichiro. "Static properties of baryons in holographic QCD." 京都大学 (Kyoto University), 2009. http://hdl.handle.net/2433/124420.

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21

Elliot-Ripley, Matthew Kevin Ian David. "Baryons, salt and popcorn in holographic QCD." Thesis, Durham University, 2017. http://etheses.dur.ac.uk/12156/.

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The Sakai-Sugimoto model is the leading model of holographic QCD. It has an effective five-dimensional description in which baryons correspond to the bulk topological solitons of a Yang-Mills-Chern-Simons theory. However, the large dimensionality of the model means studying soliton solutions either analytically or numerically is difficult. Sakai-Sugimoto solitons in the high density limit should provide an analogue of cold, dense QCD. Two competing theories for high-density solutions are the dyon salt model, in which the appropriate crystal is a salt-like arrangement of dyons, and the baryonic
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22

Zbroszczyk, Hanna Paulina. "Les études des corrélations baryon-baryon dans les collisions nucléaires relativistes enregistrées dans l'expérience STAR." Nantes, 2008. http://www.theses.fr/2008NANT2133.

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Ce travail fait partie du programme scientifique de l'expérience STAR (Solenoidal Tracker At RHIC) au BNL (Brookhaven National Laboratory) qui fonctionne auprès du RHIC (Relativistic Heavy Ion Collider). Le but principal de l'expérience STAR est de mesurer les propriétés de la matière extrêmement chaude et dense créée pendant la collision d'ions lourds. Il est attendu qu'à la suite de la collision des noyaux d'or à l'énergie √snn =200GeV/nucleon une nouvelle forme de matière – OGP (Quark Gluon Plasma) sera créé. Ce nouvel état, qui aurait existé une microseconde après le Big Bang, permettra de
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23

Hütsi, Gert. "Cosmic sound measuring the Universe with baryonic acoustic oscillations /." [S.l.] : [s.n.], 2006. http://edoc.ub.uni-muenchen.de/archive/00005400.

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24

Huetsi, Gert. "Cosmic sound: Measuring the Universe with baryonic acoustic oscillations." Diss., lmu, 2006. http://nbn-resolving.de/urn:nbn:de:bvb:19-54005.

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25

Cole, David Ronald. "Interactions of dark and baryonic matter in dwarf galaxies." Thesis, University of Leicester, 2012. http://hdl.handle.net/2381/10918.

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The ΛCDM model for structure formation in the universe has been successful on large scales, however there are outstanding problems on the scale of galaxies. In this thesis we study a number of processes where baryonic and dark matter (DM) interact on the scale of galaxies in order to provide a greater understanding of how such processes can explain observations. One significant issue for ΛCDM is the prediction of cusped density profiles for DM halos. In Chapter 2 we consider the infall of a massive baryonic clump into a dark-matter halo and demonstrate that the baryons need to transfer only a
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26

Pinto, Leda Cardoso Sampson. "The luminosity and baryonic mass functions, and their evolution." Thesis, University of Cambridge, 2007. https://www.repository.cam.ac.uk/handle/1810/290023.

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27

Stella, Nicoletta. "Heavy baryon phenomenology from lattice QCD." Thesis, University of Southampton, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.242393.

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28

Perkins, Warren Bryan. "Baryon decay catalysis and cosmic strings." Thesis, University of Cambridge, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.239105.

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29

Lewis, Stefanie Janneke. "Bayesian data analysis in baryon spectroscopy." Thesis, University of Glasgow, 2014. http://theses.gla.ac.uk/5245/.

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The strong interaction within a nucleon has been the focus of much theoretical and experimental work in nuclear and particle physics. Theorists have been improving lattice QCD calculations and developing quark models that define the inter-quark interactions, and experimentalists have spent years gathering data to support and improve these models. Finding nucleon resonance states provides essential information for the development of these theories and improves our understanding of the excited nucleon spectrum. There are a variety of quark models that have been proposed which each predict a uniq
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30

Lefcoe, Andrew Carleton University Dissertation Physics. "The Baryon as a topological soliton." Ottawa, 1985.

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31

Silva, António. "Form factors of the baryon octet in the chiral quark soliton model." [S.l.] : [s.n.], 2004. http://deposit.ddb.de/cgi-bin/dokserv?idn=972728074.

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32

Oettel, Martin. "Baryons as relativistic bound states of quark and diquark." [S.l. : s.n.], 2000. http://deposit.ddb.de/cgi-bin/dokserv?idn=96321604X.

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33

Rasera, Yann. "L'histoire cosmique des baryons dans un univers hierarchique." Phd thesis, Université Paris-Diderot - Paris VII, 2005. http://tel.archives-ouvertes.fr/tel-00070844.

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Durant cette these, j'ai etudie la formation des galaxies grace a des simulations cosmologiques et a un nouveau modele analytique. Dans le cadre du modele standard de formation hierachique des grandes structures, les petites fluctuations primordiales de densite observees sur le fond diffus cosmologique sont amplifiees par la gravite pour donner des halos de matiere noire de plus en plus gros. C'est au sein de ces halos que le gaz s'effondre et se refroidit pour former des disques de gaz froid a support centrifuge. Ces disques sont ensuite convertis en disques stellaires : les galaxies. Le prob
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34

Ohlsson, Tommy. "Properties of baryons in the chiral quark model." Licentiate thesis, KTH, Fysik, 1997. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-756.

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In this thesis, several properties of baryons are studied using the chiral quark model. The chiral quark model is a theory which can be used to describe low energy phenomena of baryons. In Paper 1, the chiral quark model is studied using wave functions with configuration mixing. This study is motivated by the fact that the chiral quark model cannot otherwise break the Coleman–Glashow sum-rule for the magnetic moments of the octet baryons, which is xperimentally broken by about ten standard deviations. Configuration mixing with quark-diquark components is also able to reproduce the octet baryon
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35

Powell, Leila Catherine. "Baryons in hierarchical structure formation : substructure and accretion." Thesis, University of Oxford, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.532005.

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36

Cahill, Mark D. "An extension of the Skyrme model of baryons." Thesis, University of Kent, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.329094.

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37

McGovern, J. A. "Strange baryons in a chiral quark-meson model." Thesis, University of Manchester, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.233064.

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38

Blanckenberg, Jacobus Petrus. "Skyrme model description of heavy baryons with strangeness." Thesis, Stellenbosch : Stellenbosch University, 2015. http://hdl.handle.net/10019.1/96953.

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39

McEwen, Joseph Eugene McEwen. "The Hidden Universe: Dark Energy, Dark Matter, Baryons." The Ohio State University, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=osu1471877488.

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40

Rasera, Yann. "L'histoire cosmique des baryons dans un univers hiérarchique." Paris 7, 2005. https://tel.archives-ouvertes.fr/tel-00070844.

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41

Helminen, Christina. "Aspects of the quark model for the baryons." Helsinki : University of Helsinki, 2000. http://ethesis.helsinki.fi/julkaisut/mat/fysii/vk/helminen/.

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42

Sutcliffe, William. "Determination of the quark coupling strength |Vub| using baryonic decays." Thesis, Imperial College London, 2016. http://hdl.handle.net/10044/1/41844.

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This thesis presents the first determination of |Vub| at a hadron collider and in a baryonic decay. The determination is made by measuring the ratio of branching fractions of the baryonic decays $\Lambda^{0}_{b} \rightarrow p \mu^{-} \bar{\nu}_{\mu}$ and $\Lambda^{0}_{b} \rightarrow \Lambda^{+}_{c} \mu^{-} \bar{\nu}_{\mu}$ at large momentum transfer squared. The experimental measurement was made using a $2$ fb$^{-1}$ dataset of $pp$ collision events produced at $\sqrt{s}= 8$ TeV by the Large Hadron Collider and collected by the LHCb experiment in 2012. This is the first observation of the deca
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43

Beddow, John K. S. "Searches for two-body charmless baryonic B0 decays at LHCb." Thesis, University of Glasgow, 2016. http://theses.gla.ac.uk/7745/.

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The results of two separate searches for the rare two-body charmless baryonic decays B0 → p pbar and B0s → p pbar at the LHCb experiment are reported in this thesis. The first analysis uses a data sample, corresponding to an integrated luminosity of 0.9 fb^-1, of proton-proton collision data collected by the LHCb experiment at a centre-of-mass energy of 7 TeV. An excess of B0 → p pbar candidates with respect to background expectations is seen with a statistical significance of 3.3 standard deviations. This constitutes the first evidence for a two-body charmless baryonic B0 decay. No significan
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44

Eckhart, Eric Ashton. "A search for charmless baryonic B meson decays at CLEO." Columbus, OH : Ohio State University, 2003. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1054568796.

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Thesis (Ph. D.)--Ohio State University, 2003.<br>Title from first page of PDF file. Document formatted into pages; contains xv, 133 p.: ill. Includes abstract and vita. Advisor: Richard D. Kass, Dept. of Physics. Includes bibliographical references (p. 132-133).
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45

Durrive, Jean-Baptiste. "Baryonic processes in the large scale structuring of the Universe." Thesis, Université Paris-Saclay (ComUE), 2016. http://www.theses.fr/2016SACLS346/document.

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Ma thèse porte sur deux questions importantes de la Cosmologie:(i) L'origine des champs magnétiques cosmologiques:L'Univers semble magnétisé à absolument toutes ses échelles (spatiales et temporelles), y compris le milieu intergalactique. Mais leur origine est encore inconnue à l'heure actuelle, malgré les nombreux efforts pour essayer de répondre à cette question. On pense qu'ils ont d'abord été générés avec de très faibles amplitudes, puis qu'ils ont été amplifiés au cours de la formation des structures. La turbulence dans les galaxies et les amas de galaxies modifie totalement l'organisatio
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46

Benson, Kevin E. C. "Aspects of the electroweak phase transition and baryogenesis." Thesis, University of Oxford, 1993. http://ora.ox.ac.uk/objects/uuid:27c64513-bbb7-4f94-b385-4e691354a7b5.

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In this thesis we study aspects of the cosmological electroweak phase transition which are relevant to the possibility of baryogenesis at this epoch. We focus on two issues: first, requiring that the observed baryon number be of electroweak origin places strong constraints on electroweak physics, and second, baryogenesis at the electroweak scale may be driven by an asymmetry generated at the GUT scale. We use the effective potential at finite temperature as a means of analyzing phase transitions associated with spontaneous symmetry breaking. We develop the theory with two basic examples: the s
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47

Plaszczynski, Stéphane. "Etude de la production des hyperons a lep (delphi) et recherche de baryons beaux etranges." Paris 7, 1994. http://www.theses.fr/1994PA077178.

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A partir de l'analyse des donnees enregistrees a lep avec le detecteur delphi en 1991-1992-1993, un signal de baryons beaux etranges est obtenu par l'etude des correlations de charge entre un hyperon xi et un lepton d'un meme jet. Les diverses sources conduisant a cet etat final sont etudiees. La probabilite que ce signal soit issu de fluctuations d'autres sources que des baryons beaux est estimee a 10#-#4. Une evaluation de la duree de vie des baryons beaux etranges est effectuee. Les taux de production inclusifs de plusieurs hyperons sont egalement mesures
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48

Feijoo, Aliau Albert. "Meson-Baryon interactions from effective Chiral Lagrangians." Doctoral thesis, Universitat de Barcelona, 2017. http://hdl.handle.net/10803/459150.

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The purpose of this thesis has been to study the S=-1 meson-baryon interaction in S-wave employing an effective chiral SU(3) lagrangian up to NLO and implementing unitarization in coupled channels. Such a study requires fixing the NLO coefficients of the lagrangian which are not well established yet. In general, the low energy constants of an effective lagrangian are obtained from fitting procedures to the experimental available data. These parameters have been constrained to a large set of experimental K^- p scattering data into πΣ,K ̅N, πΛ channels, to γ, R_n and R_c branching ratios, an
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49

Tomalin, I. R. "Strange baryon production in e'+e'- annihilation." Thesis, University of Oxford, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.235095.

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50

Bosworth, Steven. "A measurement of the B-Baryon lifetime." Thesis, University of Oxford, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.308501.

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