<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>0035-001X</journal-id>
<journal-title><![CDATA[Revista mexicana de física]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. mex. fis.]]></abbrev-journal-title>
<issn>0035-001X</issn>
<publisher>
<publisher-name><![CDATA[Sociedad Mexicana de Física]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0035-001X2009000500007</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Masa del fotón por medio de un condensador de placas paralelas]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rodríguez]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,Universidad de Carabobo Facultad de Ciencia Y Tecnología (FACYT) Departamento de Física]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Venezuela</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>10</month>
<year>2009</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>10</month>
<year>2009</year>
</pub-date>
<volume>55</volume>
<numero>5</numero>
<fpage>373</fpage>
<lpage>377</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0035-001X2009000500007&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0035-001X2009000500007&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0035-001X2009000500007&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Aquí se obtiene el campo eléctrico en el interior de un condensador de placas paralelas derivado a partir de las ecuaciones de Proca. El campo encontrado se compone del campo eléctrico estándar, Es, y un campo adicional dependiente de la masa del fotón E&#947;. Este campo adicional junto con un efecto del tipo AB para partículas neutras con momento dipolar magnético permite establecer un límite superior sobre la masa del fotón. El límite superior encontrado por medio de este escenario de naturaleza cuántica es del orden de 10-41g.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Here it is obtained the electrical field inside of a parallel-plates capacitor derived from Proca's equations. The field consists of the electric field standard Es, and an additional field dependent of the photon mass E&#947;. This additional field together with an effect of the AB type for neutral particles with magnetic dipole moment can set an upper limit on the photon mass. The upper limit obtained by this scenario of quantum nature is 10-41g.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Ecuaciones de Proca]]></kwd>
<kwd lng="es"><![CDATA[efecto Aharonov-Bohm]]></kwd>
<kwd lng="es"><![CDATA[masa del fotón]]></kwd>
<kwd lng="en"><![CDATA[Proca's equations]]></kwd>
<kwd lng="en"><![CDATA[Aharonov-Bohm effect]]></kwd>
<kwd lng="en"><![CDATA[photon mass]]></kwd>
</kwd-group>
</article-meta>
</front><body><![CDATA[ <p align="justify"><font face="verdana" size="4">Investigaci&oacute;n</font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="center"><font face="verdana" size="4"><b>Masa del fot&oacute;n por medio de un condensador de placas paralelas</b></font></p>     <p align="center"><font face="verdana" size="2">&nbsp;</font></p>     <p align="center"><font face="verdana" size="2"><b>M. Rodr&iacute;guez</b></font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2"><i>Departamento de F&iacute;sica, Facultad de Ciencia Y Tecnolog&iacute;a (FACYT), Universidad de Carabobo, Naguanagua, 2001&#150;Venezuela, </i>e&#150;mail: <a href="mailto:merodriguez3@uc.edu.ve">merodriguez3@uc.edu.ve</a></font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2">Recibido el 3 de abril de 2009    <br> Aceptado el 9 de junio de 2009</font></p>     ]]></body>
<body><![CDATA[<p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2"><b>Resumen</b></font></p>     <p align="justify"><font face="verdana" size="2">Aqu&iacute; se obtiene el campo el&eacute;ctrico en el interior de un condensador de placas paralelas derivado a partir de las ecuaciones de Proca. El campo encontrado se compone del campo el&eacute;ctrico est&aacute;ndar, <b>E</b><sub>s</sub>, y un campo adicional dependiente de la masa del fot&oacute;n <b>E</b><sub>&gamma;</sub>. Este campo adicional junto con un efecto del tipo AB para part&iacute;culas neutras con momento dipolar magn&eacute;tico permite establecer un l&iacute;mite superior sobre la masa del fot&oacute;n. El l&iacute;mite superior encontrado por medio de este escenario de naturaleza cu&aacute;ntica es del orden de 10<sup>&#150;41</sup>g.</font></p>     <p align="justify"><font face="verdana" size="2"><b>Descriptores:</b> Ecuaciones de Proca; efecto Aharonov&#150;Bohm; masa del fot&oacute;n.</font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2"><b>Abstract</b></font></p>     <p align="justify"><font face="verdana" size="2">Here it is obtained the electrical field inside of a parallel&#150;plates capacitor derived from Proca's equations. The field consists of the electric field standard <b>E</b><sub>s</sub>, and an additional field dependent of the photon mass <b>E</b><sub>&gamma;</sub>. This additional field together with an effect of the AB type for neutral particles with magnetic dipole moment can set an upper limit on the photon mass. The upper limit obtained by this scenario of quantum nature is 10<sup>&#150;41</sup>g.</font></p>     <p align="justify"><font face="verdana" size="2"><b>Keywords:</b> Proca's equations; Aharonov&#150;Bohm effect; photon mass.</font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2">PACS: 14.70.Bh; 03.65.Ta</font></p>     ]]></body>
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