From:	SMTP%"Guido.Montagna@pv.infn.it" 27-SEP-1999 18:39:04.27
To:	GIAMPIERO
CC:	
Subj:	numeri LEP2: seconda tornata

From: Guido.Montagna@pv.infn.it
Date: Mon, 27 Sep 1999 18:31:26 +0200
To: GIAMPIERO@to.infn.it
CC: MONTAGNA@pv.infn.it
Message-Id: <990927183126.22a1e10e@pv.infn.it>
Subject: numeri LEP2: seconda tornata

Caro Giampiero,

 segue una seconda tornata di numeri:
1) single-W, sezioni d'urto Born alle tre energie per 
   1.1) e+e- -> e- {bar nu_e} mu+ nu_mu
   1.2) e+e- -> e- {bar nu_e} tau+ nu_tau
   con tagli e input come da proposal;
2) 4f+\gamma, sezioni d'urto Born alle tre energie per
   2.1) e+e- --> e- {bar nu_e} u {bar d} gamma
   2.2) e+e- --> mu- {bar nu_mu} tau+ nu_tau gamma
   2.3) e+e- --> e- {bar nu_e} mu+ nu_mu gamma
   2.4) e+e- --> u {bar d} c {bar s} gamma
   Per il processo 2.1)  M_ud > 10 GeV;
   Per il processo 2.2) e 2.3) M_l+l- > 10 GeV;
   Per il processo 2.4) at least two pairs with 
                        M_qiqj > 10 GeV.  
   Taglio angolare su fotone sempre |cos\theta_\gamma|<0.985,
   e altri tagli "fissi" come da proposal.

Grazie, ciao
              Andrea, Fulvio, Guido, Mauro, Marco e Oreste             


1) Single-W
==============================================
1.1) Process: e+e- -> e- {bar nu_e} mu+ nu_mu
     Input parameters as in 4f proposal 
==============================================

E_beam = 183. GeV

BORN cross-section: 26.47 +- 0.04 fb

E_beam = 189. GeV

BORN cross section: 29.70 +- 0.04 fb

E_beam = 200. GeV

BORN cross section: 35.93 +- 0.05 fb

=================================================
1.2) Process: e+e- ->  e- {bar nu_e} tau+ nu_tau
     Input parameters as in 4f proposal 
=================================================

E_beam = 183. GeV

BORN cross-section: 26.3 +- 0.2 fb

E_beam = 189. GeV

BORN cross section: 29.6 +- 0.2 fb

E_beam = 200. GeV

BORN cross section: 35.92 +- 0.05 fb
============================================

2) Four fermions plus gamma
=====================================================
2.1) Process: e+e- -> e- {bar nu_e} u {bar d} gamma
     Input parameters as in 4f proposal 
=====================================================

E_beam = 200. GeV        
BORN cross section: 81.18 +- 0.23 fb

E_beam = 189. GeV        
BORN cross section: 76.56 +- 0.22 fb

E_beam = 183. GeV        
BORN cross section: 71.09 +- 0.16 fb

========================================================
2.2) Process: e+e- -> mu- {bar nu_mu} tau+ nu_tau gamma
     Input parameters as in 4f proposal 
========================================================

E_beam = 200. GeV        
BORN cross section: 29.45 +- 0.07 fb

E_beam = 189. GeV        
BORN cross section: 28.30 +- 0.06 fb

E_beam = 183. GeV        
BORN cross section: 26.62 +- 0.05 fb

=====================================================
2.3) Process: e+e- -> e- {bar nu_e} mu+ nu_mu gamma
     Input parameters as in 4f proposal 
=====================================================

E_beam = 200. GeV        
BORN cross section: 30.32 +- 0.07 fb

E_beam = 189. GeV        
BORN cross section: 28.89 +- 0.07 fb

E_beam = 183. GeV        
BORN cross section: 27.02 +- 0.06 fb

=====================================================
2.4) Process: e+e- ->  u {bar d} c {bar s} gamma
     Input parameters as in 4f proposal 
=====================================================

E_beam = 200. GeV        
BORN cross section: 208.0 +- 0.4 fb

E_beam = 189. GeV        
BORN cross section: 196.3 +- 0.4 fb

E_beam = 183. GeV        
BORN cross section: 181.9 +- 0.3 fb
====================================================