Welcome sailor !!
| DAVID LÓPEZ-VAL PhD student Theoretical High Energy Physics Group Dept. Estructura i Constituents de la Matèria Universitat de Barcelona |
 |
Phone (34)-93-403-92-88
E-mail dlopez@ecm.ub.es
Adress Dept. ECM (Office 607), Facultat de Física,
Av. Diagonal 647 E-08028 Barcelona
Research Activity
Some notes and references on Physics
Something about me
Some thoughts
Some links
Currently I am concentrated on several topics in Particle Physics Phenomenology beyond the Standard Model.
My research assignments, which I carry out under the supervision of my PhD advisors, Professors Joan Solà and Jaume Guasch, involve two main streamlines:
On one hand we are interested in tracing back the role of Supersymmetric theories into the flavour dynamics of elementary particles. Of crucial importance are the Flavour-Changing Neutral Currents (FCNC), which turn out to be extremely supressed in the Standard Model (due to the Glashow-Iliopoloulos-Maiani mechanism) but, in contrast, could be largely enhanced on the grounds of some more fundamental underlying dynamics. In particular, my master thesis was devoted to study the single top-quark production triggered by flavor-changing supersymmetric interactions in proton-proton collisions to be observed at the LHC. This is a very interesting process since it could provide a very large signal (of around 100,000 events in the whole life of the LHC !!) that would be distinctive (if ever observed) of a Supersymmetric dynamics lying beyond the Standard Model. Furthermore, we have also recently shown than even in the case of virtually decoupled gluinos (which are the SUSY force carriers of the strong interaction), we could still be left with sizeable production rates entailing around 1000 events, due to the cooperative SUSY-EW contribution. For further details you can have a look at the eprint hep-ph/0710.0587, and also at the talks I gave at the RADCOR 2007 International Conference (Firenze) and at the Interplay of Collider and Flavor Physics Worshop at CERN (the latter includes several recent results, obtained in collaboration with Santi Béjar)
On the other hand we are also working very hard on the (certainly exciting !) field of particle phenomenology in Extended Higgs Sectors, either in Supersymmetric (MSSM) and non-Supersymmetric (2HDM's) scenarios. Last summer we showed (see our eprint hep-ph/0707.3162.) that, due to the potential enhancements of the trilinear Higgs self-interactions, the triple Higgs production channels by electron-positron anihilation in the general 2HDM would result into cross sections up to 50.000 events, that is, even higher than the pair-production case (!). Such a surprising fact would translate into 6 heavy-quark jet production through the decay of the Higgs bosons, which could entail spectacular signals in Linear Colliders ! Now I am (almost) fully concentrated in a giant computation involving the 1-loop renormalization of the neutral Higgs sector within the general 2HDM. Other studies, such as for instance on the inclusive triple Higgs production cross sections within the 2HDM context are also in progress.
On one hand we are interested in tracing back the role of Supersymmetric theories into the flavour dynamics of elementary particles. Of crucial importance are the Flavour-Changing Neutral Currents (FCNC), which turn out to be extremely supressed in the Standard Model (due to the Glashow-Iliopoloulos-Maiani mechanism) but, in contrast, could be largely enhanced on the grounds of some more fundamental underlying dynamics. In particular, my master thesis was devoted to study the single top-quark production triggered by flavor-changing supersymmetric interactions in proton-proton collisions to be observed at the LHC. This is a very interesting process since it could provide a very large signal (of around 100,000 events in the whole life of the LHC !!) that would be distinctive (if ever observed) of a Supersymmetric dynamics lying beyond the Standard Model. Furthermore, we have also recently shown than even in the case of virtually decoupled gluinos (which are the SUSY force carriers of the strong interaction), we could still be left with sizeable production rates entailing around 1000 events, due to the cooperative SUSY-EW contribution. For further details you can have a look at the eprint hep-ph/0710.0587, and also at the talks I gave at the RADCOR 2007 International Conference (Firenze) and at the Interplay of Collider and Flavor Physics Worshop at CERN (the latter includes several recent results, obtained in collaboration with Santi Béjar)
On the other hand we are also working very hard on the (certainly exciting !) field of particle phenomenology in Extended Higgs Sectors, either in Supersymmetric (MSSM) and non-Supersymmetric (2HDM's) scenarios. Last summer we showed (see our eprint hep-ph/0707.3162.) that, due to the potential enhancements of the trilinear Higgs self-interactions, the triple Higgs production channels by electron-positron anihilation in the general 2HDM would result into cross sections up to 50.000 events, that is, even higher than the pair-production case (!). Such a surprising fact would translate into 6 heavy-quark jet production through the decay of the Higgs bosons, which could entail spectacular signals in Linear Colliders ! Now I am (almost) fully concentrated in a giant computation involving the 1-loop renormalization of the neutral Higgs sector within the general 2HDM. Other studies, such as for instance on the inclusive triple Higgs production cross sections within the 2HDM context are also in progress.
Formerly I had also been in touch with several topics related to Nuclear and Many-Body Physics.
During a collaboration grant (from 2005 to 2006), and under the
supervision of Professors Artur Polls, Isaac Vidaña and Arnau
Rios, I explored the thermodynamical properties of nuclear and neutron
matter at finite temperature with finite-range effective nuclear
interactions. This work led to the publication Phys. Rev. C74 (2006) 068801 (nuc-th/0604058). We also adressed the problem of
hyperonic impurities in the nuclear medium within a
Brueckner-Hartree-Fock approach and the application of Gogny-type
nuclear forces to neutron star calculations.
all these words together ! I hope you enjoy ! )
No me entristecería si los hombres no me conocieran; pero me afligiría si yo no conociera a los hombres (Confucio)
Carmina invenient iter (Sèneca)
Si no ens entenem per paraules, entenguem-nos per amor (Ramon Llull)
El feixisme és una malaltia que es cura pensant (popular de manis ...)
Les fulles cauen tot besant la llum serena // i el cel és més subtil pels homes que se'n van (Josep Carner)
All our life we will wait for an answer ... and the question is why (Enigma)
Som milions i el planeta no és vostre ! (popular de manis ...)
En cada mot, m'hi jugo l'existència (Miquel Martí i Pol)
Algú ha de matar el drac perquè d'altres recullin les roses (mine)
Puer sic itur ad astra (Virgili)
Logics will take you from A to B. Imagination will take you everywhere (Albert Einstein)
No obris els llavis si no estàs segur que el que diràs és més bonic que el silenci (Alfred Tapscott)
Euer ruhm wird jahrhunderte überleben (Monument als caiguts soviètics, Treptower Park, Berlin)
Cuando veamos personas ilustres, pensemos en igualarlas. Cuando veamos personas llenas de defectos, volvámonos hacia nosotros y examinémonos (Confucio)
The Devil is in the detail (José Ignacio Latorre)
Y la muerte sucumbió ante su belleza (Rafael Argullol)
- Pare, mare, què és l'infern ? - Que t'hagin prohibit el dret d'estimar (Fiodor Doistoievski)
Allò que fa tan dur morir és ignorar per sempre que la vida, com un planeta, traça l'el·lipse d'una llum més gran (Vicenç Llorca)
There's no teacher who can teach anything new. He can just help us to remember the things we always knew (Enigma)
L'originalitat consisteix a retornar a l'origen (Antoni Gaudí)
En tot bon mestre, hi ha un bon deixeble (?)
Potser la barca encara lluita, donant brandades per mar endins. També la vida sents com navega per les onades del teu destí (Toful Mas, dins de l'havanera La Barca de Suro )
Problems cannot be solved with the same awareness that created them (Albert Einstein)
En un beso, sabrás todo lo que he callado (Pablo Neruda)
Nosaltres dos anant cap a nosaltres u (Miquel Àngel Riera)
No demano l'absència de dolors ni perills. Només demano el coratge d'afrontar-los (?).
A vegades la vida és com una suite dantesca, però sense Beatrice (mine)\
Por todo lo que ha sido, gracias. A todo lo que ha de ser, sí (Anthony de Mello)
Some technical (purely HEP) links:
The FeynArts, FormCalc and LoopTools websites -- the beatiful codes by Thomas Hahn and his people at the MPI
The FeynHiggs code -- if you are ever in need of a 2-loop Higgs mass spectrum ...
The CompHEP code, much easier to handle and user-friendly -- but one cannot go beyond tree-level ..
HEP arxives and databases:
ArXiv (direct link to the daily submissions to hep-ph, and to hep-th)
Spires
The CERN Document Server
Some lecture notes:
Standard Model (compiled by the INFN, Italy)
Gerard 't Hooft's advices on "how to become a good theoretical physicist"
And also useful (and really nice):
The Ubuntu site: for me, this is the best distribution to get in touch with the Linux operative system. If you are still a Windows user, please do not hesitate for longer, just format your hard disk and install Ubuntu !
The MikTeX project site: In case your life is still "windows-like" but you want to use a nice set of facilities for processing scientific documents.
The Benissanet Institute of Technology (BiT): this is a lovely site, managed by some colleagues of mine, with great forums and nice materials regarding Physics and Mathematics.
Some pieces of work that I have uploaded here just in case that they are of interest to you ... !
* A brief insight into Differential Renormalitzation: In this brief report I review such technique of handling ultra-violet divergences in Quantum Field Theory. This work was suggested by Professor José Ignacio Latorre during a course on Particle Physics that I took during the autumn semester of 2006. If you are learning LaTeX and you would like to learn how to work out slides within a LaTeX package (for instance prosper), you can also download the following source code and have a look at it.
* Seminari al departament d'Àlgebra i Geometria: Aquí he penjat les notes que he fet servir en el seminari del dia 29 de juny de 2007. Per una banda, el petit resum sobre com les idees de la Renormalització apareixen en el context de la Física de la Matèria Condensada (descàrrega). Per altra, un resum sobre la Renormalització Diferencial en Teoria Quàntica de Camps (descàrrega).
* Students' Seminars 2009: (Non-Standard Perspectives on Electroweak Symmetry Breaking).
Please find herewith an extended version of the slided I used for my seminar on February the 13th.
I was born in Barcelona, it was March 1983
I grew up in this lovely city and I am still living there (with a lovely exception of six months in Munich)
I am quite good at cooking
I am extremely bad at playing football
Apart from Physics, I really love Literature (mainly Poetry and Theatre)
and Languages (foreign and ancient ...)
If you made me choose ...
A place to live in: Barcelona
A place to visit: Berlin
Something to taste: red wine
Something not to taste: most types of fish (I'm sorry for my mother ...),
and beer (I'm even more sorry for my german friends)
Something to learn from: pain
Something that I always miss: the sea
Something to believe in: Science
Something not to believe in: money
Someone to listen to: Pere Casaldàliga
Someone not to listen to: that guy that was president of Spain from 1996 to 2004
A street: Leopoldstrasse (Munich)
A picture: El Jardin de Las Delicias (El Bosco)
A book: Elegies de Bierville (Carles Riba)
A theatre play: Cyrano de Bergerac (Edmont Rostand)
A song: Worlds Apart (Bruce Springsteen)
( It is sort of a mess of languages, topics and authors,
but I really love mixing * A brief insight into Differential Renormalitzation: In this brief report I review such technique of handling ultra-violet divergences in Quantum Field Theory. This work was suggested by Professor José Ignacio Latorre during a course on Particle Physics that I took during the autumn semester of 2006. If you are learning LaTeX and you would like to learn how to work out slides within a LaTeX package (for instance prosper), you can also download the following source code and have a look at it.
* Seminari al departament d'Àlgebra i Geometria: Aquí he penjat les notes que he fet servir en el seminari del dia 29 de juny de 2007. Per una banda, el petit resum sobre com les idees de la Renormalització apareixen en el context de la Física de la Matèria Condensada (descàrrega). Per altra, un resum sobre la Renormalització Diferencial en Teoria Quàntica de Camps (descàrrega).
* Students' Seminars 2009: (Non-Standard Perspectives on Electroweak Symmetry Breaking).
Please find herewith an extended version of the slided I used for my seminar on February the 13th.
I was born in Barcelona, it was March 1983
I grew up in this lovely city and I am still living there (with a lovely exception of six months in Munich)
I am quite good at cooking
I am extremely bad at playing football
Apart from Physics, I really love Literature (mainly Poetry and Theatre)
and Languages (foreign and ancient ...)
If you made me choose ...
A place to live in: Barcelona
A place to visit: Berlin
Something to taste: red wine
Something not to taste: most types of fish (I'm sorry for my mother ...),
and beer (I'm even more sorry for my german friends)
Something to learn from: pain
Something that I always miss: the sea
Something to believe in: Science
Something not to believe in: money
Someone to listen to: Pere Casaldàliga
Someone not to listen to: that guy that was president of Spain from 1996 to 2004
A street: Leopoldstrasse (Munich)
A picture: El Jardin de Las Delicias (El Bosco)
A book: Elegies de Bierville (Carles Riba)
A theatre play: Cyrano de Bergerac (Edmont Rostand)
A song: Worlds Apart (Bruce Springsteen)
all these words together ! I hope you enjoy ! )
No me entristecería si los hombres no me conocieran; pero me afligiría si yo no conociera a los hombres (Confucio)
Carmina invenient iter (Sèneca)
Si no ens entenem per paraules, entenguem-nos per amor (Ramon Llull)
El feixisme és una malaltia que es cura pensant (popular de manis ...)
Les fulles cauen tot besant la llum serena // i el cel és més subtil pels homes que se'n van (Josep Carner)
All our life we will wait for an answer ... and the question is why (Enigma)
Som milions i el planeta no és vostre ! (popular de manis ...)
En cada mot, m'hi jugo l'existència (Miquel Martí i Pol)
Algú ha de matar el drac perquè d'altres recullin les roses (mine)
Puer sic itur ad astra (Virgili)
Logics will take you from A to B. Imagination will take you everywhere (Albert Einstein)
No obris els llavis si no estàs segur que el que diràs és més bonic que el silenci (Alfred Tapscott)
Euer ruhm wird jahrhunderte überleben (Monument als caiguts soviètics, Treptower Park, Berlin)
Cuando veamos personas ilustres, pensemos en igualarlas. Cuando veamos personas llenas de defectos, volvámonos hacia nosotros y examinémonos (Confucio)
The Devil is in the detail (José Ignacio Latorre)
Y la muerte sucumbió ante su belleza (Rafael Argullol)
- Pare, mare, què és l'infern ? - Que t'hagin prohibit el dret d'estimar (Fiodor Doistoievski)
Allò que fa tan dur morir és ignorar per sempre que la vida, com un planeta, traça l'el·lipse d'una llum més gran (Vicenç Llorca)
There's no teacher who can teach anything new. He can just help us to remember the things we always knew (Enigma)
L'originalitat consisteix a retornar a l'origen (Antoni Gaudí)
En tot bon mestre, hi ha un bon deixeble (?)
Potser la barca encara lluita, donant brandades per mar endins. També la vida sents com navega per les onades del teu destí (Toful Mas, dins de l'havanera La Barca de Suro )
Problems cannot be solved with the same awareness that created them (Albert Einstein)
En un beso, sabrás todo lo que he callado (Pablo Neruda)
Nosaltres dos anant cap a nosaltres u (Miquel Àngel Riera)
No demano l'absència de dolors ni perills. Només demano el coratge d'afrontar-los (?).
A vegades la vida és com una suite dantesca, però sense Beatrice (mine)\
Por todo lo que ha sido, gracias. A todo lo que ha de ser, sí (Anthony de Mello)
Some technical (purely HEP) links:
The FeynArts, FormCalc and LoopTools websites -- the beatiful codes by Thomas Hahn and his people at the MPI
The FeynHiggs code -- if you are ever in need of a 2-loop Higgs mass spectrum ...
The CompHEP code, much easier to handle and user-friendly -- but one cannot go beyond tree-level ..
HEP arxives and databases:
ArXiv (direct link to the daily submissions to hep-ph, and to hep-th)
Spires
The CERN Document Server
Some lecture notes:
Standard Model (compiled by the INFN, Italy)
Gerard 't Hooft's advices on "how to become a good theoretical physicist"
And also useful (and really nice):
The Ubuntu site: for me, this is the best distribution to get in touch with the Linux operative system. If you are still a Windows user, please do not hesitate for longer, just format your hard disk and install Ubuntu !
The MikTeX project site: In case your life is still "windows-like" but you want to use a nice set of facilities for processing scientific documents.
The Benissanet Institute of Technology (BiT): this is a lovely site, managed by some colleagues of mine, with great forums and nice materials regarding Physics and Mathematics.