Silver halide emulsion and silver halide photographic light-sensitive material

A silver halide emulsion, which is chemically sensitized by a compound represented by formula (1):

• wherein, in formula (1), Ch represents a sulfur atom, a selenium atom, or a tellurium atom;
• X1 represents NR1, or N+(R2)R3Y−, in which R1 represents a hydrogen atom, an alkyl group, an alkenyl group, an alkynyl group, an aryl group, or a heterocyclic group, and R2 and R3 each independently represent an alkyl group, an alkenyl group, an alkynyl group, an aryl group, or a heterocyclic group, and Y− represents an anionic ion;
• X2 represents a hydrogen atom, an alkyl group, an alkenyl group, an alkynyl group, an aryl group, a heterocyclic group, OR4, or N(R5)R6, in which R4, R5, and R6 each independently represent a hydrogen atom, an alkyl group, an alkenyl group, an alkynyl group, an aryl group, or a heterocyclic group;
• and E is a group selected from groups represented by formula (2), (3), (4), or (5):
• wherein, in formula (2), Z represents a hydrogen atom, an alkyl group, an alkenyl group, an alkynyl group, an aryl group, a heterocyclic group, OR7, or N(R8)R9, in which R7, R8, and R9 each independently represent a hydrogen atom, an alkyl group, an alkenyl group, an alkynyl group, an aryl group, or a heterocyclic group;
• wherein, in formula (3), A1 represents an oxygen atom, a sulfur atom, or NR13;
• and R10, R11, R12, and R13 each independently represent a hydrogen atom, an alkyl group, an alkenyl group, an alkynyl group, an aryl group, or a heterocyclic group;
• wherein, in formula (4), A2 represents an oxygen atom, a sulfur atom, or NR17;
• R14 represents a hydrogen atom, an alkyl group, an alkenyl group, an alkynyl group, an aryl group, a heterocyclic group, or an acyl group;
• R15, R6, and R17 each independently represent a hydrogen atom, an alkyl group, an alkenyl group, an alkynyl group, an aryl group, or a heterocyclic group;
• W represents a substituent;
• n is an integer from 0 to 4;
• when n is 2 or more, Ws may be the same or different;
• and
• wherein, in formula (5), L represents a divalent linking group;
• and EWG represents an electron withdrawing group.