Thank you for your useful answer, the JS/CSS/Jquery script are added when using H:HEAD, below are the generated HTML page :
1- using <head> tag
<head>
<title>TODO supply a title</title>
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
</head>
2- using <h:head> tag
<head><link type="text/css" rel="stylesheet" href="/PrimefacesExamples /face/javax.faces.resource/theme.css?ln=primefaces-aristo" />
<link type="text/css" rel="stylesheet" href="/PrimefacesExamples/faces/javax.faces.resource/primefaces.css?ln=primefaces&v=4.0" />
<script type="text/javascript" src="/PrimefacesExamples/faces/javax.faces.resource/jquery/jquery.js?ln=primefaces&v=4.0"></script>
<script type="text/javascript" src="/PrimefacesExamples/faces/javax.faces.resource/jquery/jquery-plugins.js?ln=primefaces&v=4.0"></script>
<script type="text/javascript" src="/PrimefacesExamples/faces/javax.faces.resource/primefaces.js?ln=primefaces&v=4.0"></script>
<title>TODO supply a title</title>
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
</head>