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def V(phi,T):
    lbd_0 = m_h**2/(2*v**2)
    V0 = (lbd_0/4)*(phi**2 - v**2)**2
    MASSA_W = ((mw2(phi)**2)*np.log(mw2(phi)/m_w**2)) -((3*mw2(phi)**2)/2) + (2*mw2(phi))*(m_w**2) - (m_w**4)/2
    MASSA_Z = ((mz2(phi)**2)*np.log(mz2(phi)/m_z**2)) -((3*mz2(phi)**2)/2) + (2*mz2(phi))*(m_z**2) - (m_z**4)/2
    MASSA_t = ((mt2(phi)**2)*np.log(mt2(phi)/m_t**2)) -((3*mt2(phi)**2)/2) + (2*mt2(phi))*(m_t**2) - (m_t**4)/2
    V1 = (1/(64*(pi**2)))*(MASSA_W+MASSA_Z+MASSA_t)
    if T!=0.0:
        del_V1 = ((T**4/(2*pi**2))*((6*jb(np.sqrt(mw2(phi))/T) + (3*jb(np.sqrt(mz2(phi))/T)) - (12*jf(np.sqrt(mt2(phi))/T)))))         
        return V0+V1+del_V1
    else:
        return V0+V1